Clearpost.online It's your post, so post it!

Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0139 AM CDT Thu Sep 08 2022

Valid 081200Z - 091200Z

...CRITICAL FIRE WEATHER AREA FOR CENTRAL IDAHO...
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE CENTRAL HIGH
PLAINS...

...Synopsis...
An upper trough moving onshore across the Pacific Northwest is
forecast to strengthen today as high pressure is broken down over
the Southwest. Moderate mid-level flow will spil* eastward into the
central/northern Rockies and over the High Plains. A lee low over
the eastern Plains is expected to strengthen, dragging a cold front
south through WY and the Dakotas. Moderate flow aloft and increasing
surface pressure gradients driven by the low will support strong
surface wind fields across the central Rockies and High Plains into
tonight. With unseasonably hot temperatures and very dry fuels,
widespread elevated to critical fire weather conditions are
expected.

...Central Idaho...
As the upper trough continues eastward, moderate flow aloft will
linger across central ID behind a cold front. Gusty west winds will
develop across the central Rockies and the Snake River Valley, with
gusts to 25 mph possible this afternoon and evening. While
temperatures will be cooler behind the front, poor overnight
humidity recoveries will allow for low diurnal RH values of 15-20%.
Fuels remain extremely dry and recent lightning/fire activity lends
high confidence to critical fire weather concerns given the
favorable RH and wind co*binations.

...Wyoming onto the central High Plains...
Ahead of the cold front near the surface low, winds are forecast to
reach 20-30 mph in the afternoon across portions of eastern CO, NE
and southeastern SD. Very hot daytime temperatures should support
low afternoon humidity values below 20% along with the strong wind
gusts. Widespread elevated and critical fire weather conditions
appear likely given very dry fuels.

Farther north across central NE and portions of northern CO, the
lower humidity may be short lived as the cold front quickly moves
south. Some fire weather risk may linger for a few hours behind the
front given gusty winds near the surface low. While humidity values
should quickly begin to rise, the strong wind shift and very dry
fuels may still allow for a few hours of elevated fire weather
concerns following frontal passage.

Isolated high-based thunderstorms may also develop near and behind
the cold front across portions of central and eastern WY. Initially
dry, a few lightning strikes and strong outflow winds are possible
through the afternoon and early evening. Storm coverage is expected
to be relatively low, and strong forcing from the upper trough
should eventually support more widespread rainfall limiting the risk
for dry strikes.

..Lyons.. 09/08/2022

...Please see www.spc.noaa.gov/fire for graphic product...