U.S. Day 1 Fire Weather Outlook
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 271654
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1054 AM CST Fri Jan 27 2023
Valid 271700Z - 281200Z
No changes to the ongoing forecast.
..Wendt.. 01/27/2023
.PREV DISCUSSION... /ISSUED 1232 AM CST Fri Jan 27 2023/
...Synopsis...
A longwave upper-level pattern associated with a broad cyclone over
the Hudson Bay will dominate the CONUS. A few distinct areas of the
country could experience elevated or near-elevated fire-weather
conditions, but the overall threat will be tempered by broad mild
conditions and flow.
To the east, a subtle shortwave trough rotating southeastward
through the broader cyclonic flow from the Pacific Northwest towards
eastern CO. Flow will become more zonal leading to lee surface
cyclogenesis in eastern CO. This cyclone will deepen slightly as it
translates eastward during the second half of the period.
Strengthening southerly flow will develop across the western OK/TX
Panhandles and vicinity, but atmospheric and fuel moisture remain
below elevated thresholds after recent precipitation.
...southern CA/AZ...
Northeasterly flow persists in southern CA and southwest AZ.
Localized downsloping gusts and drier conditions are possible, but
ground and fuel moisture levels remain high. This will temper the
overall fire threat in this region.
...FL Peninsula...
Surface high pressure expected to form along the northern Gulf Coast
throughout the day on Friday, leading to large-scale descent in the
southeast US and FL. Dry, northerly flow down the FL peninsula could
lead to minimum RH values around 30-35% amidst winds around 15-20
kts. HREF guidance suggests that sustained winds may peak prior to
the realization of minimum RH values, but enough spatiotemporal
overlap exists to warrant an Elevated area.
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 270722
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0122 AM CST Fri Jan 27 2023
Valid 281200Z - 291200Z
...Synopsis...
The general weather pattern continues to be dominated by broad
cyclonic flow and generally mild conditions. Within this flow, a
trough axis in the western US will slowly pivot from around the Four
Corners region through the Midwest. An attendant weak surface low
will track northeastward through the Great Lakes as a cold front
plunges southward through the Central Plains. Return flow to the
south of the front will yield more humid conditions across the
Arklatex region. The relatively moist airmasses on both sides of the
front and modest surface flow will yield below-elevated fire-weather
conditions across the CONUS east of the Rockies, with the exception
of portions of west TX.
...west TX...
Strengthening southwesterly flow (around 15-20 kts) is anticipated
on Saturday across portions of the Trans-Pecos region. Associated
boundary-layer mixing is expected to yield minimum RH values around
10-15% amidst diurnally warming temperatures. ERCs appear rather
low, but the dearth of precipitation in this region has led to
10-1000-hr fuel moisture around 10% or lower. The Elevated area
represents the most likely region where these criteria will overlap
during the afternoon on Saturday.
..Flournoy/Lyons.. 01/27/2023
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 262047
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0247 PM CST Thu Jan 26 2023
Valid 281200Z - 031200Z
Fire weather concerns are expected to be minimal in the extended,
owing to largely unreceptive fuels and cooling temperatures across
much of the CONUS. On D3 Saturday, a shortwave will rotate through
the Western US within the longwave pattern with strengthening
surface lee troughing across Colorado. This regime will bring
increased southwesterly flow across portions of the Southern and
Central Plains with warm and dry downslope flow allowing for
relative humidity reductions across the Oklahoma/Texas Panhandles.
Localized Elevated to near Critical conditions may be possible for
Big Bend, which has received less precipitation over the last 7
days. Even with less precipitation, periods of cooler temperatures
and light winds have helped keep fuels within this region marginal.
As such, no potential regions of Elevated or Critical conditions
have been included with this outlook.
..Thornton.. 01/26/2023
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