U.S. Alerts
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U.S. Day 1 Fire Weather Outlook

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 201650

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1150 AM CDT Tue May 20 2025

   Valid 201700Z - 211200Z

   ...Northeastern Minnesota...
   Recent precipitation in addition to cool temperatures and higher
   relative humidity have mitigated the fire weather threat across the
   Red River Valley of the North. Elevated fire weather conditions
   including east winds of 15-25 mph and relative humidity as low as 20
   percent are still expected across northeastern Minnesota where fuels
   remain marginally dry/receptive to spread.

   ..Williams.. 05/20/2025

   .PREV DISCUSSION... /ISSUED 0140 AM CDT Tue May 20 2025/

   ...Synopsis...
   A midlevel low will drift slowly northward across portions of the
   northern Plains, while an accompanying surface low advances eastward
   from the Mid MS Valley into the OH Valley through the period. North
   of the surface low, a tight pressure gradient will favor
   breezy/gusty easterly surface winds across parts of the Upper MS
   Valley. Over northern MN, these breezy/gusty surface winds will
   combine with around 25 percent afternoon RH, and given modestly
   receptive fuels, elevated fire-weather conditions can be expected. 

   On the backside of the surface low, locally dry/breezy post-frontal
   conditions will develop across parts of the central High Plains.
   While locally elevated fire-weather conditions are possible, a
   limited spatial overlap of the breezy winds and low RH atop
   receptive fuels should generally limit the fire-weather risk.
      

U.S. Day 2 Fire Weather Outlook


   ZCZC SPCFWDDY2 ALL
   FNUS22 KWNS 201949

   Day 2 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0249 PM CDT Tue May 20 2025

   Valid 211200Z - 221200Z

   ...NO CRITICAL AREAS...

   A departing mid-level jet should support localized downslope
   enhancement of winds and drying along the Colorado Front Range
   Wednesday. However, fuels are not particularly receptive to fire
   spread with ongoing green up along the Front Range, mitigating
   overall fire weather threat. Otherwise, no widespread fire weather
   concerns across the CONUS.

   ..Williams.. 05/20/2025

   .PREV DISCUSSION... /ISSUED 0141 AM CDT Tue May 20 2025/

   ...Synopsis...
   A belt of enhanced westerly midlevel flow will be in place across
   the central Rockies on Wednesday. This will promote locally
   dry/breezy conditions along the CO Front Range during the afternoon.
   While locally elevated fire-weather conditions are possible, the
   overall risk appears too localized for highlights. Elsewhere across
   the CONUS, a limited overlap of warm, dry, and windy conditions
   should limit fire-weather concerns.


U.S. Day 3-8 Fire Weather Outlook


   ZCZC SPCFWDD38 ALL
   FNUS28 KWNS 192022

   Day 3-8 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   0322 PM CDT Mon May 19 2025

   Valid 211200Z - 271200Z

   Mainly zonal mid-level flow through the middle of the week will give
   way to upper ridging in the Plains as mid-level troughs deepen
   across the western and eastern U.S. by the end of the week. By the
   weekend into early next week, the western mid-level trough will
   de-amplify while progressing toward the Plains. Surface high
   pressure will build across the central and northern U.S. through the
   week, while a surface low will encourage the northward return of
   moisture across the southern Plains by the end of the week toward
   the weekend. Overall quiescent fire weather conditions are expected
   through most of the extended range. The largest concern for future
   significant wildfire-spread potential remains across portions of the
   Southwest, where prolonged warm and dry conditions will support the
   continued curing of fuels. Disagreement remains among medium-range
   guidance members in terms of the evolution of the de-amplifying
   western upper trough by the weekend. Stronger surface winds may
   develop over parts of the Southwest by the weekend, but confidence
   in this scenario is too low for the introduction of Critical
   probabilities at this time.

   ..Squitieri.. 05/19/2025
      




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