Las Vegas, NV...Henderson, NV...Paradise, NV...Sunrise Manor, NV...North Las Vegas, NV...
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 201936
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0236 PM CDT Sun Jun 20 2021
Valid 211200Z - 221200Z
...CRITICAL FIRE WEATHER AREA FOR SOUTHERN NEVADA...
With very strong heating and thermal pressure trough development,
the increasing mid-level flow across southern Nevada will lead to
lead to a targeted area of critical fire weather in southern Nevada.
With lightning activity within the last three days, there is some
potential for holder fire activity.
With the approach of a shortwave trough late in the day, isolated
thunderstorms could develop within south-central Oregon during the
afternoon. A broader area of mid-level convection is possible into
the overnight as a disturbance moves northward through the area.
PWAT values will be increasing through the day and will potentially
be near 0.8-0.9 in. during the overnight. However, there still is
potential for lightning ignitions for a few reasons: 1) elevated
convection will be moving quickly, 2) limited buoyancy will keep the
lifespan of any one convective element short, and 3) low-levels
still appear modestly dry in forecast soundings.
.PREV DISCUSSION... /ISSUED 0152 AM CDT Sun Jun 20 2021/
A deepening trough across the northern third of the US will keep
cooler and wetter conditions across the center of the country
through Monday. High pressure over the Southwest will gradually
weaken as a mid-level low moves onshore across California. Elevated
fire weather conditions may develop across portions of the
Southwest, while thunderstorms are expected across the West Coast.
...Southern Great Basin...
On the periphery of the suppressed ridge across the Southwest,
stronger mid-level flow will begin to overspread the southern Great
Basin ahead of a Pacific trough Day2/Monday. Sheltered from the
cooler airmass associated with the stalled front through the
Rockies, warm and dry conditions are expected with surface RH of
10-15%. The favorable overlap of dry surface conditions and gusty
winds will support elevated to near critical fire weather potential
through the day. A corridor of critical fire weather conditions may
develop across southern Nevada and Utah Monday afternoon, where
stronger mid-level flow may enhance westerly surface winds to 20-30
mph. However, model differences highlight some uncertainty with the
eastward extent of the stronger mid-level flow, suggesting low
predictability for widespread/concentrated critical conditions.
..Northern California and southern Oregon...
A few thunderstorms may develop Monday as moist onshore flow ahead
of the Pacific trough overspreads the West Coast. Model soundings
show sufficient instability for isolated lightning strikes from late
afternoon through the evening. Fuels are receptive to starts, but
increasing moisture with PWATS near 1 inch suggest storms may
produce enough precipitation to limit significant potential for dry
...Please see www.spc.noaa.gov/fire for graphic product...
CLICK FOR DAY 2 FIREWX AREAL OUTLINE PRODUCT (KWNSPFWFD2)