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    Day 2 FW Outlook >
Sep 19, 2019 Day 1 Fire Weather Outlook
Updated: Thu Sep 19 16:39:02 UTC 2019 (Print Version | 20190919 1700Z Day 1 FireWX shapefile | 20190919 1700Z Day 1 FireWX KML)
Day 1 Fire
 Pop.  Cities  CWAs  RFCs  Interstates  Counties  ARTCC  FEMA Regions  Day 1 Surface Analysis

Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
Critical 63,253 468,153 St. George, UT...Kingman, AZ...Cedar City, UT...Washington, UT...Hurricane, UT...
   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 191637

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1137 AM CDT Thu Sep 19 2019

   Valid 191700Z - 201200Z

   ...CRITICAL FIRE WEATHER AREA FOR FAR SOUTHEAST NEVADA...NORTHWEST
   ARIZONA...AND A LARGE PORTION OF UTAH...

   No changes are needed to the ongoing forecast of critical fire
   weather conditions across portions of southeastern Nevada,
   northwestern Arizona, and Utah (see previous discussion below). 
   Strong insolation ahead of an approaching upper-level trough has
   already resulted in some locations reporting RH values this morning
   below 20% along with wind gusts approaching 30 mph.  As boundary
   layer mixing continues through the afternoon, widespread critical
   fire weather conditions are expected across the region with the
   potential for strong wind gusts (i.e., approaching 50 mph).

   ..Jirak.. 09/19/2019

   .PREV DISCUSSION... /ISSUED 1246 AM CDT Thu Sep 19 2019/

   ...Synopsis...
   A strong mid-level jet will spread across the Great Basin today
   ahead of a mid-level closed low. Some of these strong winds are
   expected to transport toward the surface through deep vertical
   mixing. Surface winds could be quite strong (30 to 35 mph) in
   northwest Arizona and southwest Utah with some gusts approaching 50
   mph. In addition, this pre-frontal airmass will feature dry surface
   conditions and RH values around 10 to 20 percent. 20 to 30 mph
   surface winds are expected farther northeast into most of Wyoming
   where relative humidity will also be in the 15 to 20 percent range.
   Isolated critical conditions will be possible in this region, but no
   critical area was added here due to borderline relative humidity and
   relatively sparse fuels.

   ...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: September 19, 2019
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