Weather Prediction Center

National Oceanic and Atmospheric Administration

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
412 PM EDT Sun May 04 2025

Valid 00Z Mon May 05 2025 - 00Z Wed May 07 2025

...A continued omega block pattern over the lower 48 will lead to
prolonged periods of unsettled weather and cooler temperatures into early
next week...

...Locally heavy rainfall with flash flooding possible for southern New
England Monday...

...Scattered instances of flash flooding as well as severe weather
forecast for the southern High Plains Sunday and Monday...

The lower 48 states will be in a blocky pattern that keeps upper-level
lows anchored over the California and Desert Southwest and over the Ohio
Valley. Cooler temperatures and widespread showers and thunderstorms can
be expected across the East as an occluded/cold front arcing southeastward
along the Lower Great Lakes and East Coast over the next couple of days.
Given the slow progression of this system, moderate to locally heavy
rainfall can be expected with isolated flash flooding possible today
through at least Wednesday morning. The southern portion of the cold front
over the Southeast/Carolinas will make the most eastward progress,
bringing an end to rain chances for these areas during the day Monday as
the front clears the coast, while rainfall lingers into Tuesday for the
Lower Great Lakes and Northeast. Forecast temperatures broadly throughout
the Great Lakes and Southeast will remain below average the next couple of
days, particularly for the Ohio/Tennessee Valleys, with highs mainly in
the 50s and 60s. Conditions will be closer to average along the East Coast
ahead of the slow moving front, with highs in the 60s and 70s for New
England and the northern Mid-Atlantic and the 70s and 80s for the southern
Mid-Atlantic/Carolinas.

The north-central U.S. will generally be dry with daily temperatures above
normal. Elsewhere, dry conditions and well above average temperatures are
expected across north-central portions of the country as the upper-ridge
builds overhead. Highs will be in the 70s and 80s Sunday across the
northern/central Rockies, northern/central Plains, and Upper Midwest. Some
locations across the northern High Plains may approach 90, upwards of
30-35 degrees above average for this time of year. The approach of the
upper-low and an accompanying eastward moving cold front will bring much
cooler temperatures to the northern/central Rockies and adjacent High
Plains Monday as highs fall into the 50s and 60s.

Further west, widespread precipitation chances were remain possible under
the influence of the second upper-level low. Showers and thunderstorms
throughout the Northern Rockies, Great Basin, Four Corners region, and
Southwest are forecast to shift to the east on Monday, bringing greater
chances into areas of the Central Rockies and the adjacent High Plains as
areas of the western Great Basin dry out. Moderate to locally heavy
rainfall, with some isolated flash flooding possible, is most likely over
the western Great Basin today and the eastern Great Basin Monday. For some
of the locations with higher terrain, snow will likely accumulate,
especially for parts of the Northern/Central Rockies where totals of 4 to
8+ inches are expected. A more focused corridor of showers and
thunderstorms along with more widespread heavy rainfall is expected over
the southern High Plains as anomalously high moisture from the Gulf flows
northwestward ahead of a surface frontal system emerging from the
mountains over the region. A Slight Risk of Excessive Rainfall is in place
for portions of northeastern New Mexico today with another Slight Risk
over portions of the Texas Panhandle/western Texas on Monday where the
potential for rain rates of 1"/hr and 2-4" totals may lead to some
scattered instances of flash flooding. In addition, sufficient instability
given the moisture in place and cooler air aloft with the approaching low,
along with increasing upper-level winds, will lead to the threat of some
severe weather. The Storm Prediction Center has outlined portions of
southeastern New Mexico with a Slight Risk (level 2/5) today mainly for
the threat of large hail. Another Slight Risk in place Monday across
portions of western Texas for the threat of very large hail, damaging
winds, and a few tornadoes. In contrast to the unsettled weather to the
north, portions of southwestern New Mexico will remain very dry ahead of
the approaching upper-low, with the combination of low humidity and gusty
winds prompting a Critical Risk of fire weather (level 2/3) from the Storm
Prediction Center for today. WPC has highlighted portions of the
Southern/Central High Plains as having a Slight Risk for locally heavy
rain and flash flooding today and Monday (level 2/4) before expanding
across the Gulf states/Lower Mississippi and raising to a Moderate Risk
(level 3/4). Conditions across much of the west and into the southern
Plains will be below average given the upper-low overhead and widespread
precipitation. Forecast temperatures Sunday are mainly in the 50s and 60s
across the Interior West with 60s and 70s in the Desert Southwest and
southern Plains. The West Coast will be cooler and below average as well
on Sunday, with highs in the 50s and 60s, before a warm up into the 60s
and 70s on Monday as the upper-low shifts eastward.

Campbell/Putnam


Graphics available at
https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
253 AM EDT Mon May 5 2025

Valid 12Z Thu May 08 2025 - 12Z Mon May 12 2025


...Mid to late week heavy rainfall potential for the central Gulf
Coast into the Southeast...


...Overview...

A weakening upper low over the central Plains will shift slowly
eastward, eventually settling over/near the Southeast through next
weekend. This should allow for a stationary or very slow moving
frontal boundary to remain draped across the Southeast with some
daily chances for heavy rainfall as anomalous moisture pools along
the boundary. Meanwhile, a northern stream shortwave may briefly
close off a low over the Northeast, but with a lot of uncertainty
in what or any sensible weather impacts this may bring. Elongated
troughing off the West Coast, stemming from an upper low moving out
of the Gulf of Alaska, will move into the West next Sunday, with
some agreement on a closed low over the Pacific Northwest/northern
California region early next week. This pushes upper ridging
downstream in the Plains states.


...Guidance/Predictability Assessment...

While model guidance agrees in principle on the larger scale
features and evolution described above, uncertainty in the details
still produce sensible weather differences. As early as day 4,
models continue to struggle with a cutoff low over the location and
track of a cutoff low over the Northeast. The ECMWF was the
outlier this evening, showing a low much farther south over the
Mid- Atlantic versus the better consensus which is farther north
and over the Northeast. The UKMET was the farthest north. Still
some run to run variability in the models so the evolution of this
feature remains very low confidence still.

Elsewhere, the models show agreement that the upper low initially
over the Central/Southern Plains will drift slowly east over the
Southeast, but with plenty of uncertainty in the timing. The ECMWF
was the fastest to race this feature off the Southeast by early
next week. Out West, the CMC continues to be the outlier with
keeping troughing well off the West Coast as a result of an earlier
cut off upper low drifting southwestward. The ECMWF, GFS, and the
ensemble means show troughing moving into the West, with some
indications that a broad closed low may be present over the West
Coast by next Monday.

The WPC forecast for tonight used a blend of the deterministic
models with the ensemble means, outside of the UKMET which was much
farther north with the early period upper low over the Northeast.
Increased the weighting of the ensemble means from 30 to 70 percent
through the period which helps mitigate the smaller scale
differences, especially late period.


...Weather/Hazards Highlights...

A stationary frontal boundary through the Southeast to central
Gulf Coast will continue some sort of heavy rainfall threat along
the boundary within an area of anomalous moisture. However, model
spread, drier antecedent conditions, and higher flash flood
guidance limits the overall flash flooding potential. As such, held
with marginal risks on the Days 4 and 5 EROs (Thursday and Friday)
for tonight. Areas of rain are also likely across the central
Plains to Middle Mississippi Valley into Thursday and lingering
into Friday in the Lower Mississippi Valley. Areas of rain are also
possible in the northeastern U.S. at times later this week into
the weekend, but amounts are highly dependent on upper low
evolution.

The upper low over the Southern Plains region early in the period
will result in lingering below normal temperatures for the south-
central Plains where daytime highs could be 5-10 degrees below
normal. This should moderate with time but may still remain
modestly below normal into late week for the southern Plains. Upper
troughing/low over the Northeast keeps temperatures near or below
normal as well. Upper ridging building over the West as the upper
low shifts east will allow for expanding coverage of above normal
temperatures there as the week progresses, including 100 degree
temperatures in the Desert Southwest. Above average temperatures
will stretch into the northern tier as well, with highs reaching
the 70s and 80s in the northern Plains to Upper Midwest.


Santorelli


Additional 3-7 Day Hazard information can be found on the WPC
medium range hazards outlook chart at:
https://www.wpc.ncep.noaa.gov/threats/threats.php

WPC medium range 500mb heights, surface systems, weather grids,
quantitative precipitation forecast (QPF), excessive rainfall
outlook (ERO), winter weather outlook (WWO) probabilities, heat
indices, and Key Messages can be accessed from:

https://www.wpc.ncep.noaa.gov/medr/5dayfcst500_wbg.gif
https://www.wpc.ncep.noaa.gov/medr/5dayfcst_wbg_conus.gif
https://www.wpc.ncep.noaa.gov/5km_grids/5km_gridsbody.html
https://www.wpc.ncep.noaa.gov/qpf/day4-7.shtml
https://www.wpc.ncep.noaa.gov/#page=ero
https://www.wpc.ncep.noaa.gov/wwd/pwpf_d47/pwpf_medr.php?day=4
https://www.wpc.ncep.noaa.gov/heat_index.shtml
https://www.wpc.ncep.noaa.gov/#page=ovw

Hawaii Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
319 AM EDT Sun May 4 2025

Valid 00Z Mon 05 May 2025 - 00Z Mon 12 May 2025

Guidance continues to show a persistent easterly trade wind pattern
over the next week or so featuring upper ridging over the main
islands into at least the middle of next week. An upper low out of
the Gulf of Alaska will extend troughing towards Hawaii around
next Thursday, which may support higher moisture and some increase
in windward/mountain-focused showers. Developing surface high
pressure to the north of Hawaii will continue moderate to brisk
wind speeds through next week.

Santorelli

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
746 PM EDT Sun May 4 2025
Day 1 threat area: www.wpc.ncep.noaa.gov/qpf/94epoints.txt

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
746 PM EDT Sun May 4 2025
Day 2 Valid 12Z Mon May 05 2025 - 12Z Tue May 06 2025

...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PORTIONS OF THE SOUTHERN HIGH PLAINS...

...2030Z Update...

...Southern High Plains...

The Slight Risk area was expanded northwestward to include more of the Texas Panhandle and far eastern New Mexico with this update and in coordination with ABQ/Albuquerque, NM and AMA/Amarillo, TX forecast offices. Showers and thunderstorms from the overnight period will likely be ongoing along the NM/TX border at the start of the period Monday morning, with periodic flareups of additional convection expected throughout the day in this same area. Following occasional daytime convection, a new MCS is likely to form during the evening across west Texas and eastern NM and track northward through the night. Thus, portions of the area, likely centered around Lubbock/southern Texas Panhandle, will likely see multiple rounds of heavy rain through Monday night. Soils in this area are well above normal for moisture, especially for the eastern Panhandle closer to Oklahoma. Therefore lesser amounts of rain than normal will be needed to result in flash flooding.

...Northeast...

The Marginal Risk across portions of the Northeast was maintained with few changes with this update. With coordination from OKX/Upton, NY; ALY/Albany, NY; BOX/Taunton, MA; and PHI/Mt. Holly, NJ forecast offices, a Slight Risk upgrade was considered for portions of the area, with numerous models forecasting a swath of 1-2 inches of rain from NYC north and east through Long Island, much of Connecticut, and the lower Hudson Valley and Catskills. Despite that, very nominal instability and dry antecedent soils conditions and low river levels were determined to likely prevent much flash flooding outside of the most flood prone areas, so the Marginal was maintained. Upslope will be a contributing factor to locally heavier and steadier rain across Connecticut and the lower Hudson Valley into the Catskills, but here too flash flooding should be confined to only isolated areas. Should instability increase or total rainfall increase a targeted Slight Risk may still be needed with future updates.

Wegman

...Previous Discussion...

Texas into New Mexico... A closed upper low over the Desert Southwest will continue to meander eastward on Monday. Confidence remains in a focused area for repeating heavy rainfall south from the TX Panhandle to the NM border where a Slight Risk remains without many changes...with main activity occurring once again around the time of maximum daytime heating and then persisting into or through the night. The suite of 04/00Z numerical guidance still shows the magnitude of precipitable water values to exceed 2 sigma by 00Z Tuesday with the 1.25" precipitable water line reaching the Caprock. The 12Z QPF consensus is for 2-4" over a sizable area just south of the TX Panhandle...with locally higher amounts embedded in the broader QPF area.

Mojave Desert through Southern Utah... Numerous showers with embedded daytime and evening thunderstorms is still expected as upper low continues to meander over Arizona as it begins to fill. Moisture is still anomalous for this time of year...being some 2 to 3 standardized anomalies above climatology for early May...but concern would be greater for excessive rainfall if the actual values of precipitable water values were greater and intense rainfall rates would be sustained for a longer duration. As a result...the risk of excessive rainfall appears to be non-zero but not enough to warrant a Marginal risk area based on coordination with local offices.

Northern Mid-Atlantic into southern New England... Closed low will continue to meanders across portions of the Upper OH Valley through Monday night. Continued onshore flow brings the threat for repeating locally heavy rain over the northern Mid- Atlantic into southern New England which will have seen some heavy rain between now and then. A Marginal Risk is maintained.


Day 2 threat area: www.wpc.ncep.noaa.gov/qpf/98epoints.txt

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
746 PM EDT Sun May 4 2025
Day 3 threat area: www.wpc.ncep.noaa.gov/qpf/99epoints.txt

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
306 PM EDT Sun May 4 2025


By Wednesday, the start of the period, the heaviest rains are
likely to focus near the central Gulf Coast pooling along a frontal
boundary. Heavy rain rates are likely along the cusp of the
instability gradient and training storms are possible generally in
southern Louisiana and vicinity. However, there are some competing
factors for flooding to be too widespread Wednesday, including
model spread with some focusing the front and thus the rainfall
offshore. The farther south axis of heaviest rain compared to the
short range puts the highest QPF atop drier antecedent conditions,
along with higher flash flood guidance in swamplands. Thus
maintained the Slight Risk across much of the Lower Mississippi
Valley rather than any upgrades at this time and will continue to
monitor trends. Urban areas could still be vulnerable to flash
flooding. Heavy rain could persist into Thursday along the central
Gulf Coast and into parts of the Southeast. Again, model spread and
higher flash flood guidance limits flooding potential for now and
will maintain a Marginal Risk for these areas on Day 5/Thursday.
Rain and thunderstorms are likely to persist across the Southeast
late week into the weekend.

Meanwhile farther west and north, precipitation including higher
elevation snow could continue into Wednesday for the south-central
Rockies. Areas of rain are also likely across the central Plains to
Middle Mississippi Valley Wednesday-Thursday and lingering into
Friday in the Lower Mississippi Valley. Areas of rain are also
possible in the northeastern U.S. at times later this week into the
weekend. On Wednesday, some wrapback moisture and instability on
the backside of the associated surface low could allow for modest
rain in Interior Northeast, but with several model and QPF cycles
showing this rain staying well under an inch, removed the Marginal
Risk as any flooding chances should be below 5 percent.

The upper low over the Southwest early in the period will result
in lingering below normal temperatures for the Southwest and south-
central Plains where daytime highs could be 10-20 degrees below
normal. This should moderate with time but may still remain
modestly below normal into late week for the southern Plains. Upper
ridging building over the West as the upper low shifts east will
allow for expanding coverage of above normal temperatures there as
the week progresses, including 100 degree temperatures in the
Desert Southwest. Above average temperatures will stretch into the
northern tier as well, with highs reaching the 70s and 80s in the
northern Plains to Upper Midwest.


Tate/Santorelli

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
306 PM EDT Sun May 4 2025


By Wednesday, the start of the period, the heaviest rains are
likely to focus near the central Gulf Coast pooling along a frontal
boundary. Heavy rain rates are likely along the cusp of the
instability gradient and training storms are possible generally in
southern Louisiana and vicinity. However, there are some competing
factors for flooding to be too widespread Wednesday, including
model spread with some focusing the front and thus the rainfall
offshore. The farther south axis of heaviest rain compared to the
short range puts the highest QPF atop drier antecedent conditions,
along with higher flash flood guidance in swamplands. Thus
maintained the Slight Risk across much of the Lower Mississippi
Valley rather than any upgrades at this time and will continue to
monitor trends. Urban areas could still be vulnerable to flash
flooding. Heavy rain could persist into Thursday along the central
Gulf Coast and into parts of the Southeast. Again, model spread and
higher flash flood guidance limits flooding potential for now and
will maintain a Marginal Risk for these areas on Day 5/Thursday.
Rain and thunderstorms are likely to persist across the Southeast
late week into the weekend.

Meanwhile farther west and north, precipitation including higher
elevation snow could continue into Wednesday for the south-central
Rockies. Areas of rain are also likely across the central Plains to
Middle Mississippi Valley Wednesday-Thursday and lingering into
Friday in the Lower Mississippi Valley. Areas of rain are also
possible in the northeastern U.S. at times later this week into the
weekend. On Wednesday, some wrapback moisture and instability on
the backside of the associated surface low could allow for modest
rain in Interior Northeast, but with several model and QPF cycles
showing this rain staying well under an inch, removed the Marginal
Risk as any flooding chances should be below 5 percent.

The upper low over the Southwest early in the period will result
in lingering below normal temperatures for the Southwest and south-
central Plains where daytime highs could be 10-20 degrees below
normal. This should moderate with time but may still remain
modestly below normal into late week for the southern Plains. Upper
ridging building over the West as the upper low shifts east will
allow for expanding coverage of above normal temperatures there as
the week progresses, including 100 degree temperatures in the
Desert Southwest. Above average temperatures will stretch into the
northern tier as well, with highs reaching the 70s and 80s in the
northern Plains to Upper Midwest.


Tate/Santorelli

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
253 AM EDT Mon May 5 2025

Valid 12Z Mon May 05 2025 - 12Z Thu May 08 2025


...Intermountain West...
Days 1-2...

The interaction of an anomalous and slow moving closed mid-level
low with a surface cold front wavering across the Central Rockies
will result in widespread heavy precipitation through Wednesday
before everything kicks out to the east during D3. The primary
mechanisms for ascent will be the intense closed low (500-700mb
height anomalies below the 1st percentile according to NAEFS) and a
cold front that will stall generally from the Dakotas across
Colorado and into the Great Basin. Intensifying and veering low to
mid level flow will encourage the impressive draw northward of
moisture, leading to robust isentropic ascent at 305K from the Gulf
into the Rockies on the downwind side of this feature. With
moisture confluence becoming impressive, ascent through height
falls and convergence along the front, aided by both strong upslope
flow (especially into the Sangre de Cristos and Front Range) and
elevated frontogenesis will wring out this moisture as expansive
and heavy precipitation from Montana through New Mexico.

Additionally, impressive easterly flow leading to the pronounced
upslope flow will correspond with some reduction (and isolated
folding) of the theta-e surfaces leading to some elevated
instability. This enhanced forcing combined with a lowering trend
in snow levels (NBM 10th% down to 7500 ft) could allow for more
impactful snow into lower elevations of the foothills, especially
across the Palmer Divide and Raton Mesa, including the I-25
corridor in that vicinity. After coordination with WFO BOU, opted
to raise SLRs a bit in this region for the potential, with some
impacts becoming more probable even east of the Front Range and
Sangres.

WPC probabilities across this area are high (>70%) for 6+ inches
both D1 and D2 in the San Juans, Sangre de Cristos, and Front
Range, with 1-2 feet of snow likely up around 9,000 ft, and locally
as much as 3+ feet above 10,000 ft. While accumulations in the
foothills and lower elevations down to 7,000 ft will be much less,
heavy snow rates with low-SLR could cause impacts even into the
I-25 corridor, especially Tuesday evening/night.

Farther north, snow levels will crash behind the cold front as it
sags southward, so while across WY and southern MT they too will
begin around 9,000 ft, by D2 snow levels are expected to fall to as
low as 6,000 ft, especially in MT and in the vicinity of
Yellowstone NP. Across this area, WPC probabilities are high
(70-90%) for 6+ inches D1 across the Absarokas and surrounding
elevations of southern MT, with probabilities reaching 50% across
the Wind Rivers, Big Horns, and in the vicinity of Yellowstone NP.

The probability of significant freezing rain across the CONUS is
less than 10%.


Weiss

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
253 AM EDT Mon May 5 2025

Valid 12Z Thu May 08 2025 - 12Z Mon May 12 2025


...Mid to late week heavy rainfall potential for the central Gulf
Coast into the Southeast...


...Overview...

A weakening upper low over the central Plains will shift slowly
eastward, eventually settling over/near the Southeast through next
weekend. This should allow for a stationary or very slow moving
frontal boundary to remain draped across the Southeast with some
daily chances for heavy rainfall as anomalous moisture pools along
the boundary. Meanwhile, a northern stream shortwave may briefly
close off a low over the Northeast, but with a lot of uncertainty
in what or any sensible weather impacts this may bring. Elongated
troughing off the West Coast, stemming from an upper low moving out
of the Gulf of Alaska, will move into the West next Sunday, with
some agreement on a closed low over the Pacific Northwest/northern
California region early next week. This pushes upper ridging
downstream in the Plains states.


...Guidance/Predictability Assessment...

While model guidance agrees in principle on the larger scale
features and evolution described above, uncertainty in the details
still produce sensible weather differences. As early as day 4,
models continue to struggle with a cutoff low over the location and
track of a cutoff low over the Northeast. The ECMWF was the
outlier this evening, showing a low much farther south over the
Mid- Atlantic versus the better consensus which is farther north
and over the Northeast. The UKMET was the farthest north. Still
some run to run variability in the models so the evolution of this
feature remains very low confidence still.

Elsewhere, the models show agreement that the upper low initially
over the Central/Southern Plains will drift slowly east over the
Southeast, but with plenty of uncertainty in the timing. The ECMWF
was the fastest to race this feature off the Southeast by early
next week. Out West, the CMC continues to be the outlier with
keeping troughing well off the West Coast as a result of an earlier
cut off upper low drifting southwestward. The ECMWF, GFS, and the
ensemble means show troughing moving into the West, with some
indications that a broad closed low may be present over the West
Coast by next Monday.

The WPC forecast for tonight used a blend of the deterministic
models with the ensemble means, outside of the UKMET which was much
farther north with the early period upper low over the Northeast.
Increased the weighting of the ensemble means from 30 to 70 percent
through the period which helps mitigate the smaller scale
differences, especially late period.


...Weather/Hazards Highlights...

A stationary frontal boundary through the Southeast to central
Gulf Coast will continue some sort of heavy rainfall threat along
the boundary within an area of anomalous moisture. However, model
spread, drier antecedent conditions, and higher flash flood
guidance limits the overall flash flooding potential. As such, held
with marginal risks on the Days 4 and 5 EROs (Thursday and Friday)
for tonight. Areas of rain are also likely across the central
Plains to Middle Mississippi Valley into Thursday and lingering
into Friday in the Lower Mississippi Valley. Areas of rain are also
possible in the northeastern U.S. at times later this week into
the weekend, but amounts are highly dependent on upper low
evolution.

The upper low over the Southern Plains region early in the period
will result in lingering below normal temperatures for the south-
central Plains where daytime highs could be 5-10 degrees below
normal. This should moderate with time but may still remain
modestly below normal into late week for the southern Plains. Upper
troughing/low over the Northeast keeps temperatures near or below
normal as well. Upper ridging building over the West as the upper
low shifts east will allow for expanding coverage of above normal
temperatures there as the week progresses, including 100 degree
temperatures in the Desert Southwest. Above average temperatures
will stretch into the northern tier as well, with highs reaching
the 70s and 80s in the northern Plains to Upper Midwest.


Santorelli


Additional 3-7 Day Hazard information can be found on the WPC
medium range hazards outlook chart at:
https://www.wpc.ncep.noaa.gov/threats/threats.php

WPC medium range 500mb heights, surface systems, weather grids,
quantitative precipitation forecast (QPF), excessive rainfall
outlook (ERO), winter weather outlook (WWO) probabilities, heat
indices, and Key Messages can be accessed from:

https://www.wpc.ncep.noaa.gov/medr/5dayfcst500_wbg.gif
https://www.wpc.ncep.noaa.gov/medr/5dayfcst_wbg_conus.gif
https://www.wpc.ncep.noaa.gov/5km_grids/5km_gridsbody.html
https://www.wpc.ncep.noaa.gov/qpf/day4-7.shtml
https://www.wpc.ncep.noaa.gov/#page=ero
https://www.wpc.ncep.noaa.gov/wwd/pwpf_d47/pwpf_medr.php?day=4
https://www.wpc.ncep.noaa.gov/heat_index.shtml
https://www.wpc.ncep.noaa.gov/#page=ovw