ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 240548

   Day 1 Fire Weather Outlook  
   NWS Storm Prediction Center Norman OK
   1248 AM CDT Wed Jun 24 2026

   Valid 241200Z - 251200Z

   ...CRITICAL FIRE WEATHER AREA FOR SCATTERED DRY THUNDERSTORMS OVER
   PORTIONS OF WESTERN AND CENTRAL UTAH...

   ...Synopsis...
   ...Central and Western Utah and the Interior West...
   An upper-level shortwave trough entering the Great Basin will
   trigger high-based showers and scattered dry thunderstorms today.
   Thunderstorm activity will begin in southern Utah this morning
   before spreading across the larger region as daytime heating
   supports more widespread instability aided by topographic lift.
   Critically dry fuels and sub-cloud dryness will at least initially
   create an environment for lightning ignitions and potentially very
   strong outflow winds. Precipitable water values will climb toward
   1.0 inch by evening, transitioning storms from dry to a wet and dry
   mix with a chance of localized wetting rains along the Interstate 15
   corridor. However, gusty outflows will threaten active wildfires,
   and pyrocumulus development remains highly possible with
   pyrocumulonimbus not out of the question if surface heating from
   fire activity can maintain momentum. Isolated dry thunderstorms with
   quick storm motions of up to 30 mph and generally slightly drier
   moisture profiles will also impact the Four Corners, eastern Great
   Basin, Wyoming Basin, and the central Idaho and southwestern Montana
   mountains.

   ...Northwestern Colorado, Northeastern Utah, and Southern Wyoming...
   Ahead of this afternoon's incoming moisture plume, strong 45 to 50
   knot mid-level flow will produce a window of elevated fire weather
   conditions. Expect sustained west-southwest winds around 15 mph
   paired with minimum relative humidity values down to 10 to 15
   percent over dry fuels before humidity values begin increasing late
   in the evening.

   ...Central and Eastern Nevada...
   On the western flank of the aforementioned moisture plume and
   coinciding with a mid-level shortwave trough, 25-35 knot mid-level
   flow will be efficiently mixed down to the surface given the hot and
   dry boundary layer. This will result in sustained west to southwest
   winds around 15 mph paired with minimum relative humidity values
   down to 10 to 15 percent.

   While this sub-tropical moisture will briefly temper the severe
   dryness over the next couple of days, a much larger concern exists.
   Any lightning holdover ignitions from storms today and tomorrow
   could rapidly expand later this week. Forecast guidance continues to
   show a major, seasonally abnormal trough arriving Friday into
   Saturday, bringing widespread and significant critical fire weather
   conditions with southwest winds gusting above 40 mph ahead of a
   strong cold front.

   ..Stearns.. 06/24/2026

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

   CLICK FOR DAY 1 FIREWX AREAL OUTLINE PRODUCT (KWNSPFWFD1)