Weather Prediction Center

National Oceanic and Atmospheric Administration

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
352 AM EDT Fri Apr 17 2026

Valid 12Z Fri Apr 17 2026 - 12Z Sun Apr 19 2026

...Widespread severe weather and flash flood threat across much of the
Midwest and central/southern Plains Friday...

...Late season wintry weather for the northern/central Rockies and Upper
Midwest/Great Lakes Friday...

...Cold front to bring an end to the well above average, hot conditions
across the central to eastern U.S. heading into the weekend...

Another active day of Spring weather is in store for much of the central
U.S. as an amplified upper-level pattern remains in place. An upper-trough
that has lingered over the western U.S. will finally begin to move
eastward bringing a cold front and trailing dryline across the Midwest and
central/southern Plains. Ample moisture and warm, buoyant air will already
be in place supporting the development of widespread thunderstorms through
the day. The Storm Prediction Center (SPC) has highlighted the Upper
Mississippi Valley southwest through the Lower Missouri Valley and into
portions of the central/southern Plains with an Enhanced Risk of severe
weather (level 3/5), with a broader Slight Risk (level 2/5) covering the
general region. Increasing deep and low-level shear with the approach of
the upper-trough will support thunderstorms capable of very large hail and
tornadoes, some of which could be strong. The best chance for strong
tornadoes will be over the Upper Mississippi Valley while the best chance
for very large hail will be over portions of the central/southern Plains.
Storms are also expected to grow upscale into the evening hours leading to
a significant damaging wind threat across portions of the Lower Missouri
Valley into the Middle Mississippi Valley. In addition, the plentiful
moisture and increased lift with the approaching upper-trough will favor
thunderstorms with hourly rain rates of 1-2" bringing the threat of
scattered flash flooding. A Slight Risk of Excessive Rainfall (level 2/4)
remains outlined from the Great Lakes southwest through the Middle
Mississippi Valley and into portions of the central/southern Plains. A
locally higher threat could materialize from the Lower Missouri Valley
southwest through the MO/KS/AR/OK where ground conditions are more
sensitive to additional rainfall.

Beyond the noted thunderstorm threats, winter weather still remains in the
forecast, with a wintry mix likely north and west of the surface low track
through the Upper Midwest and into the Upper Great Lakes. Some light to
moderate accumulating snow is also expected under the base of the
upper-trough to the west through the northern/central Rockies and perhaps
into portions of the adjacent High Plains. Gusty winds and very low
humidity west of the dryline over the southern High Plains has also
prompted a Critical Risk of Fire Weather (level 2/3) from the SPC for
Friday. The upper-trough and associated surface cold front will continue
east on Saturday, bringing thunderstorms to the Interior Northeast
southwest through the Ohio/Tennessee/Lower Mississippi Valleys and into
southern Texas. Less instability and the expectation thunderstorms will
mostly develop along the cold front will limit the severe weather
potential compared to Friday, with a Slight Risk in place for the Upper
Ohio Valley and portions of the Lower Great Lakes mainly for the threat of
some damaging wind gusts. The progressive front will bring a lower flash
flood risk as well, with an isolated threat for portions of the Lower
Mississippi Valley and southeast Texas. Showers and thunderstorm chances
will shift into the Northeast/Mid-Atlantic southwest to the Gulf Coast on
Sunday. Elsewhere, some scattered showers and thunderstorms are possible
Friday for portions of coastal New England and the Mid-Atlantic as an
upper-wave passes overhead. Some showers will begin to move into the
Pacific Northwest late Saturday and into Sunday.

The well above average heat across much of the eastern and central U.S.
under a prominent upper-ridge will remain in place one more day on Friday
before the noted cold front begins to bring much cooler, generally below
average temperatures. Highs in the 70s and 80s across the Midwest and 80s
to low 90s southwest into the southern Plains Friday will drop into the
40s and 50s to the north and 60s and 70s to the south on Saturday. Similar
highs to the east throughout the Ohio/Tennessee Valleys and Mid-Atlantic
into the Southeast through Saturday will fall to these cooler temperatures
by Sunday. Meanwhile, the western U.S. will see a warm-up following the
departure of the upper-trough and as upper-ridging then builds in. Below
average highs across much of the Interior West will rise from the 40s and
50s on Friday into the 60s by Saturday and 70s Sunday. Chilly highs in the
30s and 40s over much of the northern/central Plains into Saturday will
jump into the 60s and 70s for many by Sunday. The West Coast will remain
more temperate and around average, with highs in the 50s and 60s for the
Pacific Northwest and 60s and 70s into California.


Putnam


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

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
240 AM EDT Fri Apr 17 2026

Valid 12Z Mon Apr 20 2026 - 12Z Fri Apr 24 2026

...Overview...

A fairly active weather pattern is expected as a uppper-level low
and trough over Western U.S. will support cyclogenesis bringing
chances for showers and thunderstorms, as well as mountain snow,
over portions of Western U.S. into Northern and Central
Rockies/Plain by mid-week. Chances for active weather pushes
eastward into Ohio Valley/Great Lakes and Mid-Atlantic towards
late
week. Cooler temperatures for much of Eastern U.S. for the start
of
week, until above normal temperatures over Central and parts of
Western U.S. pushes eastward by midweek.


...Guidance/Predictability Assessment...

Models show decent agreement on large scale features of the ridge
over Central U.S., troughing over Eastern U.S., and the closed low
positioned off the West Coast. The uncertainty comes in towards
Tuesday into Wednesday, where models diverge specifically for the
system off the West Coast. The GFS continues to show a slower
progression, while the CMC/ECMWF/UKMET pushes the system closer
inland by late Tuesday into early Wednesday. Run-to-run
variability
increasing with the GFS as well. Therefore, the forecast was based
on a even mult-model blend for the first portion of the period,
then
gradually phasing in the ensemble means and lowering the GFS
weight a bit, to be able to account for some of the timing
differences.


...Weather/Hazards Highlights...

Increasing return flow from the Gulf will support a broad axis of
moisture convergence and instability along the frontal system over
the Gulf. This will favor organized convection and potential heavy
rainfall for parts of the Southern Plains on Monday and gradually
expanding into the Mississippi Valley and Ohio Valley by
Wednesday.
Late Wednesday into Thursday, the low pressure system over the
High
Plains will continue to shift eastward, bringing chances for rain
and thunderstorms well across the Plains into the Ohio Valley, Mid-
Atlantic, and parts the Great Lakes. The possibility for localized
areas of flash flooding continues as the lingering frontal
boundary
near Texas may produce training storms and repeated convection
along
the boundary. Therefore, the Marginal Risk for Day 4 will continue
for parts of south Texas.

Meanwhile, another system will move inland from the eastern
Pacific
by Monday, bringing chances for rain and thunderstorms across much
of the West Coast. Over higher elevations, expect chances for
light
to moderate snow. With the system expected to bring 1-2 inches of
rainfall on Monday and the risk of runoffs and burn-scars, the
Marginal Risk over parts of northern California have been
maintained. Similarly, for Day 5, a Marginal Risk has been placed
as
an additional 1-2 inches is expected for Tuesday into Wednesday
and
soil moisture will likely be saturated from recent rainfall. As
the
cold front moves eastward, chances for accumulating snow is likely
across portions of Central and Northern Rockies from Tuesday and
expands into the Northern Plains by Thursday. While impacts should
be mainly confined to higher elevations, some travel impacts may
be
possible.

Temperatures will trend below average on Monday over much of
Eastern
U.S. and Texas as the cold front continues to depart off the
coast,
and high pressure begins to build. Max temperatures will be in the
60s over Texas and dipping into the low 40s across parts of the
Northeast. Frost/freeze concerns will occur for Monday night for
parts of the Northeast. Over much of Central and Western U.S.
above
normal temperatures will build ahead of the frontal system, with
the
Rockies/Plains seeing 15-20 degrees above average. Towards
mid-week,
warmer temperatures will spread across to the East Coast, while
behind the frontal system, temperatures return to below normal
across parts of Western U.S.


Oudit


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, excessive rainfall outlook,
winter weather outlook probabilities, heat indices and Key
Messages are at:

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
303 AM EDT Fri Apr 17 2026

Valid 00Z Sat 18 Apr 2026 - 00Z Sat 25 Apr 2026

Latest model guidance indicates a shifting synoptic pattern as
high pressure passing north of the state slides eastward, allowing
for a brief return to typical easterly trade winds through
Saturday. Meanwhile, a low pressure system is forecast to develop
northwest of the island on Saturday. There is general model consensus
on the development of this low, though timing and latitudinal
placement vary slightly. Most solutions and ensembles suggest the
low and associated fronts will track far enough to avoid a
widespread heavy rain event, but close enough to veer winds to
the southeast and south by Sunday and Monday. A blend of the ECMWF
with both the ECENS and GFS ensemble means is preferred.

As the flow veers more SE-S, deeper tropical moisture (higher
PWATs) will spread northward across the western end of the island
chain. Instability will also be increasing as the upper level
trough approaches. As a result, showers will become more likely
Sunday through Tuesday, especially for the western islands
(Kauai/Oahu).

During the mid to latter part of next week, a return to a more
typical trade wind pattern is expected. High pressure building
across the state from the east and eventually north during this
period will drop PWATs to seasonal norms for late April as the
east-northeast trades return. During this time expect more
stable/seasonable weather conditions across the state, with light
trade showers across favored windward slopes.

Hurley

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
836 PM EDT Thu Apr 16 2026
Day 1
Valid 01Z Fri Apr 17 2026 - 12Z Fri Apr 17 2026

The probability of rainfall exceeding flash flood guidance is less
than 5 percent.

Bann


Day 1 threat area: www.wpc.ncep.noaa.gov/qpf/94epoints.txt

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
346 AM EDT Fri Apr 17 2026
Day 1
Valid 12Z Fri Apr 17 2026 - 12Z Sat Apr 18 2026

...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL FROM OKLAHOMA
THROUGH PORTIONS OF THE MIDWEST...

A strong cold front tracking southeast across the Plains will run
into a moist and unstable air mass driven by a robust low level jet
streaming north off the western Gulf and into the Great Lakes.
Meanwhile, a strengthening upper level jet will develop across
Texas and Oklahoma Friday night that will further enhance lift
across the Slight Risk region, particularly the southern part of
it. The result will be a series of waves of strong thunderstorms
that will feed on the influx of moisture and instability to allow
for frequent redevelopment and training as the entire complex of
storms pushes southeast. The strongest storms and most persistent
rainfall will occur over areas hard-hit in recent days with prior
heavy rainfall, so soils in areas from southern Oklahoma to western
Missouri are already near saturation and well above normal for soil
moisture content for this time of year. Urban areas from Kansas
City to Tulsa will be especially vulnerable should persistent heavy
rains set up over those metro areas. Meanwhile, a portion of the
Ozarks could also introduce a topographic factor to any flooding
potential. A higher-end Slight (25-40% chance of flash flooding)
is in effect from northwestern Oklahoma through central Missouri.

Meanwhile, further north into the Midwest, the storms are more
likely to organize into a single line of storms more quickly.
However, these areas have even more saturated soils due to more
recent rains. When added the urban factor in cities such as St.
Louis, Chicago, and Milwaukee, even a shortened period of heavy
rainfall could still result in widely scattered instances of flash
flooding. The Slight Risk in this area was expanded north up Lake
Michigan to Green Bay, but elsewhere remains little changed.

Wegman

Day 1 threat area: www.wpc.ncep.noaa.gov/qpf/94epoints.txt

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
346 AM EDT Fri Apr 17 2026
Day 2
Valid 12Z Sat Apr 18 2026 - 12Z Sun Apr 19 2026

...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL FOR PORTIONS OF
THE GULF COAST AND LOWER MISSISSIPPI VALLEY...

A strong cold front sweeping south down the Plains will provide the
primary forcing for a line of strong thunderstorms to form as the
front uplifts a warm and moisture-laden air mass from the Gulf. Due
to close proximity to the Gulf, PWATs are likely to spike to
between 1.5 and 1.75 inches Saturday evening. This will support
thunderstorms capable of very heavy rainfall. The line will
generally be progressive, moving south. Further, the Marginal Risk
area is generally covering some of the highest FFG areas in the
country. Thus, the flash flooding threat is largely focused on the
urban factor in areas such as Houston, Beaumont, and Alexandria.
Most of the convective activity is expected at or after sunset, so
any flooding that occurs will be more dangerous.

Wegman

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

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
346 AM EDT Fri Apr 17 2026
Day 3
Valid 12Z Sun Apr 19 2026 - 12Z Mon Apr 20 2026

...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL FOR DEEP SOUTH
TEXAS...

An area of disturbed weather, partially from the remnants of a cold
front that swept across much of Texas on Saturday, will impact
portions of Deep South Texas Sunday into Sunday night. The air mass
will be characterized by summer-like amounts of moisture, with
PWATs exceeding 2 inches in a few areas, and over 1.75 inches
across much of Deep South Texas. This will support any showers and
thunderstorms that form across the area to be capable of very
heavy rainfall. However, the forcing for this rainfall will be
lacking, resulting in only isolated to widely scattered showers and
thunderstorms. Further, the FFGs in Deep South Texas are quite
high, so any storms, which should be slow-moving, would need to
train or remain over a single area for a while to produce flash
flooding. Thus, only isolated instances of flash flooding are
expected.

Wegman

Day 3 threat area: www.wpc.ncep.noaa.gov/qpf/99epoints.txt

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
240 AM EDT Fri Apr 17 2026


Increasing return flow from the Gulf will support a broad axis of
moisture convergence and instability along the frontal system over
the Gulf. This will favor organized convection and potential heavy
rainfall for parts of the Southern Plains on Monday and gradually
expanding into the Mississippi Valley and Ohio Valley by
Wednesday.
Late Wednesday into Thursday, the low pressure system over the
High
Plains will continue to shift eastward, bringing chances for rain
and thunderstorms well across the Plains into the Ohio Valley, Mid-
Atlantic, and parts the Great Lakes. The possibility for localized
areas of flash flooding continues as the lingering frontal
boundary
near Texas may produce training storms and repeated convection
along
the boundary. Therefore, the Marginal Risk for Day 4 will continue
for parts of south Texas.

Meanwhile, another system will move inland from the eastern
Pacific
by Monday, bringing chances for rain and thunderstorms across much
of the West Coast. Over higher elevations, expect chances for
light
to moderate snow. With the system expected to bring 1-2 inches of
rainfall on Monday and the risk of runoffs and burn-scars, the
Marginal Risk over parts of northern California have been
maintained. Similarly, for Day 5, a Marginal Risk has been placed
as
an additional 1-2 inches is expected for Tuesday into Wednesday
and
soil moisture will likely be saturated from recent rainfall. As
the
cold front moves eastward, chances for accumulating snow is likely
across portions of Central and Northern Rockies from Tuesday and
expands into the Northern Plains by Thursday. While impacts should
be mainly confined to higher elevations, some travel impacts may
be
possible.

Temperatures will trend below average on Monday over much of
Eastern
U.S. and Texas as the cold front continues to depart off the
coast,
and high pressure begins to build. Max temperatures will be in the
60s over Texas and dipping into the low 40s across parts of the
Northeast. Frost/freeze concerns will occur for Monday night for
parts of the Northeast. Over much of Central and Western U.S.
above
normal temperatures will build ahead of the frontal system, with
the
Rockies/Plains seeing 15-20 degrees above average. Towards
mid-week,
warmer temperatures will spread across to the East Coast, while
behind the frontal system, temperatures return to below normal
across parts of Western U.S.


Oudit

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
240 AM EDT Fri Apr 17 2026


Increasing return flow from the Gulf will support a broad axis of
moisture convergence and instability along the frontal system over
the Gulf. This will favor organized convection and potential heavy
rainfall for parts of the Southern Plains on Monday and gradually
expanding into the Mississippi Valley and Ohio Valley by
Wednesday.
Late Wednesday into Thursday, the low pressure system over the
High
Plains will continue to shift eastward, bringing chances for rain
and thunderstorms well across the Plains into the Ohio Valley, Mid-
Atlantic, and parts the Great Lakes. The possibility for localized
areas of flash flooding continues as the lingering frontal
boundary
near Texas may produce training storms and repeated convection
along
the boundary. Therefore, the Marginal Risk for Day 4 will continue
for parts of south Texas.

Meanwhile, another system will move inland from the eastern
Pacific
by Monday, bringing chances for rain and thunderstorms across much
of the West Coast. Over higher elevations, expect chances for
light
to moderate snow. With the system expected to bring 1-2 inches of
rainfall on Monday and the risk of runoffs and burn-scars, the
Marginal Risk over parts of northern California have been
maintained. Similarly, for Day 5, a Marginal Risk has been placed
as
an additional 1-2 inches is expected for Tuesday into Wednesday
and
soil moisture will likely be saturated from recent rainfall. As
the
cold front moves eastward, chances for accumulating snow is likely
across portions of Central and Northern Rockies from Tuesday and
expands into the Northern Plains by Thursday. While impacts should
be mainly confined to higher elevations, some travel impacts may
be
possible.

Temperatures will trend below average on Monday over much of
Eastern
U.S. and Texas as the cold front continues to depart off the
coast,
and high pressure begins to build. Max temperatures will be in the
60s over Texas and dipping into the low 40s across parts of the
Northeast. Frost/freeze concerns will occur for Monday night for
parts of the Northeast. Over much of Central and Western U.S.
above
normal temperatures will build ahead of the frontal system, with
the
Rockies/Plains seeing 15-20 degrees above average. Towards
mid-week,
warmer temperatures will spread across to the East Coast, while
behind the frontal system, temperatures return to below normal
across parts of Western U.S.


Oudit

Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
309 AM EDT Fri Apr 17 2026

Valid 12Z Fri Apr 17 2026 - 12Z Mon Apr 20 2026


...North and Central Rockies through the Northern Plains...
Day 1...

De-ampifying shortwave trough will pivot E/NE across the Central
Rockies and Northern Plains through Saturday morning. Broad ascent
ahead of this trough (through a combination of height falls and
PVA) will interact with modest upper level diffluence within the
RRQ of a meridionally arcing, but weakening, jet streak. At the
surface, a cold front surging eastward will provide additional
ascent through convergence, with mid-level fgen in its wake
providing a focus for heavier precipitation as well.

Moisture will remain elevated through this evening thanks to a
combination of Pacific moisture streaming over the Rockies on broad
SW mid-level flow and southerly flow out of the Gulf lifting into
the Plains.

This will result in two axes of precipitation: lingering fgen mixed
rain/snow/freezing rain in the Northern Plains, and continued light
to moderate snow across the Central Rockies. The heaviest snow and
ice in the Northern Plains is expected before 12Z, but residual
light freezing rain/snow through this aftn could result in light
accumulations of snow (less than 2 additional inches) and freezing
rain (less than 0.05 inches) from NW MN through the Arrowhead.
Farther south into the Central Rockies, especially in the higher
elevations of CO including the Park Range and Front Range, WPC
probabilities for 4+ inches of snow remain elevated at 50-70%
through D1 before precip shuts off tonight.


...Upstate New York/Northern New England...
Day 3...

A strong cold front will cross from Upstate NY Sunday morning to
well of the Atlantic Coast by Monday morning. A narrow corridor of
robust warm and moist advection ahead of this front will bring
periods of rain to New England, but as the the cold front races
east, temperatures will crash dramatically behind it. While this
front will also cause rapid drying of the column, there appears to
be enough of a residual SW flow in the mid-levels to allow for
anafrontal precipitation to continue, which will fall as snow in
the higher elevations of Upstate NY (in the Adirondacks) as well as
the Greens of VT, Whites of NH, and mountains of interior
western/northern ME. While snowfall accumulations should be
generally modest, a few inches of snowfall is possible as reflected
by WPC probabilities indicating a 10-30% chance of 4+ inches in
these higher elevation regions.


Weiss

Extended Forecast Discussion
NWS Weather Prediction Center College Park MD
240 AM EDT Fri Apr 17 2026

Valid 12Z Mon Apr 20 2026 - 12Z Fri Apr 24 2026

...Overview...

A fairly active weather pattern is expected as a uppper-level low
and trough over Western U.S. will support cyclogenesis bringing
chances for showers and thunderstorms, as well as mountain snow,
over portions of Western U.S. into Northern and Central
Rockies/Plain by mid-week. Chances for active weather pushes
eastward into Ohio Valley/Great Lakes and Mid-Atlantic towards
late
week. Cooler temperatures for much of Eastern U.S. for the start
of
week, until above normal temperatures over Central and parts of
Western U.S. pushes eastward by midweek.


...Guidance/Predictability Assessment...

Models show decent agreement on large scale features of the ridge
over Central U.S., troughing over Eastern U.S., and the closed low
positioned off the West Coast. The uncertainty comes in towards
Tuesday into Wednesday, where models diverge specifically for the
system off the West Coast. The GFS continues to show a slower
progression, while the CMC/ECMWF/UKMET pushes the system closer
inland by late Tuesday into early Wednesday. Run-to-run
variability
increasing with the GFS as well. Therefore, the forecast was based
on a even mult-model blend for the first portion of the period,
then
gradually phasing in the ensemble means and lowering the GFS
weight a bit, to be able to account for some of the timing
differences.


...Weather/Hazards Highlights...

Increasing return flow from the Gulf will support a broad axis of
moisture convergence and instability along the frontal system over
the Gulf. This will favor organized convection and potential heavy
rainfall for parts of the Southern Plains on Monday and gradually
expanding into the Mississippi Valley and Ohio Valley by
Wednesday.
Late Wednesday into Thursday, the low pressure system over the
High
Plains will continue to shift eastward, bringing chances for rain
and thunderstorms well across the Plains into the Ohio Valley, Mid-
Atlantic, and parts the Great Lakes. The possibility for localized
areas of flash flooding continues as the lingering frontal
boundary
near Texas may produce training storms and repeated convection
along
the boundary. Therefore, the Marginal Risk for Day 4 will continue
for parts of south Texas.

Meanwhile, another system will move inland from the eastern
Pacific
by Monday, bringing chances for rain and thunderstorms across much
of the West Coast. Over higher elevations, expect chances for
light
to moderate snow. With the system expected to bring 1-2 inches of
rainfall on Monday and the risk of runoffs and burn-scars, the
Marginal Risk over parts of northern California have been
maintained. Similarly, for Day 5, a Marginal Risk has been placed
as
an additional 1-2 inches is expected for Tuesday into Wednesday
and
soil moisture will likely be saturated from recent rainfall. As
the
cold front moves eastward, chances for accumulating snow is likely
across portions of Central and Northern Rockies from Tuesday and
expands into the Northern Plains by Thursday. While impacts should
be mainly confined to higher elevations, some travel impacts may
be
possible.

Temperatures will trend below average on Monday over much of
Eastern
U.S. and Texas as the cold front continues to depart off the
coast,
and high pressure begins to build. Max temperatures will be in the
60s over Texas and dipping into the low 40s across parts of the
Northeast. Frost/freeze concerns will occur for Monday night for
parts of the Northeast. Over much of Central and Western U.S.
above
normal temperatures will build ahead of the frontal system, with
the
Rockies/Plains seeing 15-20 degrees above average. Towards
mid-week,
warmer temperatures will spread across to the East Coast, while
behind the frontal system, temperatures return to below normal
across parts of Western U.S.


Oudit


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, excessive rainfall outlook,
winter weather outlook probabilities, heat indices and Key
Messages are at:

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