Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
340 AM EDT Tue Jun 06 2023

Valid 12Z Tue Jun 06 2023 - 12Z Thu Jun 08 2023

...There is a Slight Risk of excessive rainfall over parts of the
Central/Southern Rockies/High Plains through Thursday...

...Much cooler than average temperatures over much of California/Southwest
and the Northeast...

...Air Quality Alerts over parts of the Upper Great Lakes to the
Northeast...

Upper-level impulses and moisture trapped under an upper-level ridge from
the Pacific Northwest to the Upper Mississippi Valley and southward to the
Southwest to the Central Gulf Coast will produce showers and thunderstorms
through Thursday. Some of the showers and thunderstorms will create heavy
rain over parts of Northeastern New Mexico on Tuesday. Therefore, the WPC
has issued a Slight Risk of excessive rainfall over parts of the Southern
Rockies on Tuesday into Wednesday morning. The associated heavy rain will
create mainly localized areas of flash flooding, with urban areas, roads,
and small streams the most vulnerable.

Furthermore, the showers and thunderstorms, with heavy rain, will expand
northward into parts of Colorado and Wyoming on Wednesday. Therefore, the
WPC has issued a Slight Risk of excessive rainfall over parts of the
Central/Southern Rockies and Southern High Plains on Wednesday into
Thursday morning. The associated heavy rain will create mainly localized
areas of flash flooding, with urban areas, roads, and small streams the
most vulnerable.

Moreover, an upper-level low along the California Coast will slowly move
inland and then weaken through Thursday. As a result, the system will
produce showers and thunderstorms over parts of the state and the Pacific
Northwest/Great Basin through Thursday. Additionally, a weak front moving
southward from the Great Lakes/Northeast to the Southeast to the
Tennessee/Lower Mississippi Valley and weak upper-level impulses over the
Gulf Coast will produce showers and thunderstorms from the Ohio
Valley/Central Appalachians to the Southeast to the Lower Mississippi
Valley through Thursday.

Meanwhile, an upper-level low over New England moves slowly northeastward
into Southeastern Canada, then back over Maine by Thursday. In addition,
the system produces scatted areas of rain with embedded thunderstorms on
Tuesday. On Wednesday, rain and drizzle will return over the region.

Wildfire smoke moving southward out of Canada and over the northern part
of the country has triggered Air Quality Alerts over parts of the Upper
Great Lakes to the Northeast. In the meantime, upper-level troughing will
bring much cooler than average temperatures over much of
California/Southwest and the Northeast



Ziegenfelder


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