U.S. Day 1 Fire Weather Outlook
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 081646
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1146 AM CDT Thu Jun 08 2023
Valid 081700Z - 091200Z
...NO CRITICAL AREAS...
No changes; another day of warm and very dry surface conditions may
promote locally elevated fire-weather conditions across MI and the
Great Lakes where fuels are exceptionally dry. However, weak wind
fields beneath high pressure are expected to keep conditions below
Elevated criteria. Please see the previous discussion for more
information.
..Lyons.. 06/08/2023
.PREV DISCUSSION... /ISSUED 1243 AM CDT Thu Jun 08 2023/
...Synopsis...
A mid-level trough will continue to sag southward along the East
Coast today as broad cyclonic upper flow persists over the
Southwestern U.S. Dry surface air will meander across the Ohio
Valley and Mid Atlantic toward the central Appalachians, while
seasonably dry air overspreads the Desert Southwest by afternoon
peak heating. In both regimes, the surface wind field is expected to
be weak, with wildfire-spread potential being more localized. As
such, no fire weather highlights introduced this outlook.
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 080544
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1244 AM CDT Thu Jun 08 2023
Valid 091200Z - 101200Z
...Synopsis...
The mid-level trough on the East Coast will begin to eject into the
Atlantic as a mid-level impulse overspreads the Desert Southwest
tomorrow/Friday. Dry air will continue to meander around the
Ohio/Tennessee Valleys and points eastward to the Carolina Piedmont,
but with weak surface wind fields. The lack of stronger surface
winds suggests that fire-weather spread potential should remain more
localized. As the western upper-level impulse overspreads the
Southwest, boundary-layer mixing will encourage dry and breezy
conditions across portions of southern New Mexico into Far West
Texas. 15 mph sustained westerly surface flow is forecast to overlap
with 10-15 percent RH for at least a few hours, warranting the
introduction of Elevated highlights.
..Squitieri.. 06/08/2023
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 072155
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0455 PM CDT Wed Jun 07 2023
Valid 091200Z - 151200Z
Across the CONUS, an upper-level low will linger over the Northeast
before moving offshore into the weekend. Unusually dry conditions
are expected over the Northeast and Great Lakes supporting some risk
for localized fire-weather conditions early, before a cold front
sweeps south D3/Fri. Later in the weekend and into nearly next week,
ridging aloft will give way to stronger flow ahead of a trough over
the Southwest. Very warm and dry conditions, along with increasing
winds will support a risk for critical fire-weather conditions
through the end of the extended forecast period.
...Southwest...
A shortwave trough will move quickly through the Southwest and
southern high Plains D3/Friday bringing slightly stronger flow aloft
with its passage. Across southern NM and AZ, locally enhanced wind
fields may allow for surface winds to reach 15-25 mph coincident
with humidity of 15% during the afternoon. On the periphery of
recent precipitation, fuels across this area are dry and elevated
fire-weather conditions are possible.
A brief lull in fire concerns is expected across the Southwest in
the wake of the shortwave trough Saturday as the shortwave departs
to the east. Locally gusty winds and low humidity may support a
lower-end risk for fire weather, but widespread concerns are not
expected.
Better chances for widespread elevated to critical fire-weather
conditions will develop day 5/Sun through the end of the forecast
period, A second, stronger trough will emerge across the Southwest
accompanied by 55-70 kt of mid-level flow. Aided by the stronger
flow aloft, surface winds of 20-30 mph appear increasingly likely
colocated with critical RH values. While some uncertainty on the
receptiveness of area fuels exists, several days of drying before
hand do suggest higher probabilities for critical fire-weather
conditions are likely. 40% areas have been added across portions of
NM and AZ where model guidance is in agreement on dry and windy
surface conditions developing. 70% areas may be needed as better
information on fuels is realized in subsequent outlooks.
..Lyons.. 06/07/2023
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