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    Day 2 FW Outlook >
Jul 26, 2017 Day 1 Fire Weather Outlook
Updated: Wed Jul 26 16:03:03 UTC 2017 (Print Version | 20170726 1700Z Day 1 FireWX shapefile | 20170726 1700Z 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
   FNUS21 KWNS 261601

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1101 AM CDT Wed Jul 26 2017

   Valid 261700Z - 271200Z

   The ongoing isolated dry-thunderstorm area has been adjusted in two
   areas to reflect the latest observational/guidance trends. First,
   the area has been removed from portions of southern Idaho, where
   tropospheric moisture content appears too high for a substantial
   dry-thunderstorm threat today. Regardless, gusty outflow winds may
   lead to erratic behavior with ongoing fires. Second, the western
   portion of the dry-thunderstorm area has been expanded towards the
   northern Sierra Nevada. As the northern California impulse lifts
   east/northeast, ascent along its leading edge will bolster
   convective development on higher terrain today. The 12Z REV sounding
   sampled 0.74" of PW this morning, indicating an environment still
   favorable for a few dry storms and related ignitions.

   ..Picca.. 07/26/2017

   .PREV DISCUSSION... /ISSUED 0220 AM CDT Wed Jul 26 2017/

   The slow-moving midlevel low centered over northern CA is forecast
   to begin ejecting northeast today, though otherwise the pattern will
   change little compared to previous days, with an upper ridge
   persisting across the Southwest into the southern Plains. A weak
   surface ridge will settle into portions of the central and northern
   Plains in the wake of a cold front, resulting in light winds and
   slightly cooler conditions.

   ...OR/Northern CA eastward into southern MT...
   Scattered thunderstorms are expected over many of the same areas
   that have been affected on previous days, in advance of the
   persistent midlevel low over northern CA. Thermodynamic profiles
   will may be slightly cooler and more moist compared to previous
   days, due to the cumulative effects of repeated rounds of
   convection. However, widespread wetting rainfall is not anticipated,
   and some threat for lightning-related ignitions will continue where
   dry fuels remain across the region. As a result, the dry
   thunderstorm area is maintained across the area with only minor

   ...Please see for graphic product...

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