705
FNUS21 KWNS 091650
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1049 AM CST Sun Nov 09 2025

Valid 091700Z - 101200Z

...CRITICAL FIRE WEATHER AREA FOR SOUTHERN TEXAS...

...Southern Texas and Lower Mississippi River Basin...
A dry, post-frontal air mass continues to infiltrate into
central/southern TX and lower Mississippi River Basin. Current
surface observations across central/southern TX show north-northeast
winds of 15-20 mph with higher gusts and relative humidity nearing
20%. Robust north-northeast winds 15-25 mph combined with minimum
relative humidity this afternoon of 15-20% (locally close to 10%)
and dry fuels will support a critical fire weather environment
across southern TX through the afternoon. Critical highlights were
expanded slightly southward owing to current observation trends and
short term forecast guidance. Elevated fire weather conditions
surrounding the critical area were maintained across
central/southeast TX and southwest LA where slightly lower wind
speeds and marginally higher humidity exist.

...Southern California...
Expansive surface high pressure settling into the Intermountain West
and Great Plains will continue to support a dry, offshore flow
across southern California today. Current LAX-DAG pressure gradient
of around -5 mb will continue to promote east-northeast winds of
10-20 mph with current gusts exceeding 30 mph in wind-prone gaps of
the San Rafael and San Gabriel ranges today. These winds coupled
with relative humidity as low as 15% and dry fuels will promote
elevated fire weather concerns at least through the late morning
hours. A typical reduction of offshore pressure gradient magnitude
is expected later today, which will gradually reduce fire weather
threat by late afternoon.

..Williams.. 11/09/2025

.PREV DISCUSSION... /ISSUED 1223 AM CST Sun Nov 09 2025/

...Synopsis...
A broad mid-level trough will amplify over the eastern CONUS through
the day today, which should result in an expansive surface high
pressure area over the central CONUS. North of a surface cold front,
strong surface flow (20-25 mph) is expected across portions of
southern Texas. In the dry post-frontal air mass, RH is expected to
be in the 15-20% range across the region, and fuels are fairly dry,
so have maintained the Critical fire weather risk in this area.
Surrounding the Critical risk is an Elevated highlight that covers
portions of southeastern Texas and southwest Louisiana, where fuels
are modestly dry due to ongoing drought.

Additionally, the expansive high pressure is expected to tighten the
pressure gradients in southern California, with the LAX-DAG and
LAX-WJF pressure gradients nearing -5 mb during the day on Sunday.
This should induce downslope flow with sustained winds of 15-25 mph
with higher gusts, particularly in wind-prone gaps. With the
downslope drying, RH is expected to be near 15-20%. Fine fuels in
the region should dry with the lowered RH and be receptive to fire
spread, so have maintained an Elevated highlight for fire weather in
the area.

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

$$