FXUS01 KWBC 301922
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
321 PM EDT Sat May 30 2020

Valid 00Z Sun May 31 2020 - 00Z Tue Jun 02 2020

...An Enhanced risk of severe thunderstorms, Slight Risk of
excessive rainfall over parts of the Pacific Northwest, critical
fire weather conditions in the Great Basin...

...The northern Rockies and Plains to bask in hot temperatures
into the start of the upcoming week...

...Severe threat in the North Central region, heavy showers and
strong storms possible in Texas on Monday...

A potent upper-level low slamming into California this afternoon
will head north this evening with heavy showers and thunderstorms
developing out ahead of it. This storm system is responsible for
several weather hazards, most notably the threats for severe
weather and excessive rainfall. Central Oregon and central
Washington are now under both Severe Thunderstorm and Flash Flood
Watches through this evening. Parts of northern California and the
northern Rockies could also contend with heavy rain and strong
thunderstorms. In addition to precipitation, strong winds are
likely across the Great Basin where High Wind Warnings and Wind
Advisories are in place. The combination of brisk winds and low
humidity levels are a recipe for critical fire weather conditions
throughout the weekend in the Great Basin and Colorado River
Valley. The storm system quickly races northward tonight and by
Sunday scattered showers and thunderstorms should be confined to
northern Washington, northern Idaho, and northwest Montana.

One more day of record breaking heat in the Snake River Valley
this afternoon before cooler temperatures arrive throughout the
Northwest on Sunday. Sizzling temperatures set up shop over the
northern and central Rockies and High Plains where some daily
record high temps are possible. A couple daily record high temps
could also be set in the Arizona Desert as Excessive Heat warnings
continue into Sunday. The regime of much above normal temperatures
heads east on Monday with heat indices approaching the century
mark in the northern Plains and Upper Midwest. While the North
Central region bakes the Great Lakes, Northeast, and on south into
the Carolinas will witness substantially cooler temperatures.
Daily temperature departures are forecast to range between 5 to 15
degrees below normal both Sunday and Monday. Seasonally cool
conditions versus normal are also be possible in the Rio Grande
Valley and along the West Coast.

The threat for severe weather and heavy rainfall returns to the
North Central U.S. on Monday as an area of low pressure passes
overhead. To the south, areas of showers and thunderstorms will
dot the central Rockies and Texas where heavy downpours are
possible, along with the potential for some severe weather. A
swath of heavy showers and strong thunderstorms track through the
Great Lakes late Monday.

Mullinax

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