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    Day 2 FW Outlook >
Aug 22, 2017 Day 1 Fire Weather Outlook
Updated: Tue Aug 22 06:48:02 UTC 2017 (Print Version | 20170822 1200Z Day 1 FireWX shapefile | 20170822 1200Z Day 1 FireWX KML)
Day 1 Fire
 Population  Cities/Towns  CWAs  Interstates  Counties  FEMA Regions  Day 1 Surface Analysis

Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 220645

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0145 AM CDT Tue Aug 22 2017

   Valid 221200Z - 231200Z

   ...Synopsis...
   Upper ridging will remain prominent over much of the western CONUS
   today, while an upper low located off the coast of southern/central
   CA moves little. Mid-level monsoonal-related moisture will advance
   northward along the Sierras into the southern Cascades and vicinity
   along the northern periphery of the upper low this afternoon.

   ...Portions of Northern CA into Southern/Central OR and Far
   Northwestern NV...
   Isolated to scattered thunderstorms will develop by this afternoon
   and continue through the evening hours across portions of northern
   CA into southern/central OR. Terrain-driven circulations will likely
   be the primary impetus for convective initiation. Precipitable water
   values around 0.7 to 1.0 inch and modest (~15-20 kt) mid-level
   southwesterly flow along the Sierra/Cascade crest will likely allow
   for a mix of wet/dry thunderstorms. A dry antecedent low-level
   airmass coupled with diurnal heating will act to lower RH values
   across this region, which should limit the potential for wetting
   rainfall outside of the heaviest thunderstorm cores. Strong and
   erratic outflow winds will be possible with any thunderstorm in this
   environment. Fuels also remain generally dry to very dry and
   receptive to large fire starts. Therefore, an isolated dry
   thunderstorm area continues with no changes across northern CA into
   southern/central OR and far northwestern NV.

   ..Gleason.. 08/22/2017

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

   CLICK FOR DAY 1 FIREWX AREAL OUTLINE PRODUCT (KWNSPFWFD1)
      
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Page last modified: August 22, 2017
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