SPC Day 2 Fire Weather Outlook
[html]SPC Day 2 Fire Weather Outlook
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Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1251 PM CDT Fri Aug 09 2024
Valid 101200Z - 111200Z
The primary change for this forecast update is an expansion of the
isolated dry thunderstorm risk area into eastern WA. Latest ensemble
guidance shows a reasonably strong signal for convection developing
within the higher terrain of the Cascades before moving east into a
drier air mass. While forecast soundings show PWAT values generally
near or above 0.75 inches, ensemble QPF output shows low (less than
20%) probability for wetting rainfall. This signal, along with
anticipated storm motions near 20 knots and antecedent dry fuel
conditions, has increased confidence enough for a northwestward
expansion of the dry thunderstorm risk area. A few dry thunderstorms
are also possible further south across northern UT, but confidence
in the coverage of dry vs wet thunderstorms is more limited based on
PWAT and QPF forecasts. A swath of elevated (to perhaps locally
critical) wind-driven fire weather conditions remains likely across
northern NV. See the previous discussion for additional details.
..Moore.. 08/09/2024
.PREV DISCUSSION... /ISSUED 1240 AM CDT Fri Aug 09 2024/
...Synopsis...
The upper-level tough will continue into the northern Rockies,
though it will lose more amplitude on Saturday. A surface trough
will deepen in the northern Great Basin beneath a belt of stronger
mid-level winds.
Elevated fire weather conditions appear probable in portions of
northern Nevada into southern Idaho. Surface winds near the trough
and the lee of the Sierra will increase to 15-20 mph with RH falling
into the teens to perhaps single digits during the afternoon.
Additional isolated thunderstorms are possible in central Idaho.
Given the stronger flow aloft and dry boundary layer, these storms
may produce little rainfall. Some impact on fuels from potential
precipitation occurring on Friday could occur. Highlights will be
maintained where confidence in storm development is highest and
fuels are sufficiently receptive.
...Please see www.spc.noaa.gov/fire for graphic product...
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Source: SPC Day 2 Fire Weather Outlook (http://ht**://www.spc.noaa.gov/products/fire_wx/fwdy2.html)