Storm Prediction Center Mesoscale Discussion 889

   Mesoscale Discussion 0889
   NWS Storm Prediction Center Norman OK
   0853 PM CDT Thu May 28 2026

   Areas affected...north-central Oregon

   Concerning...Severe Thunderstorm Watch 248...

   Valid 290153Z - 290330Z

   The severe weather threat for Severe Thunderstorm Watch 248
   continues.

   SUMMARY...While isolated occurrences of marginally severe hail
   and/or damaging winds remain possible, an overall decrease in storm
   intensity is expected through 03 UTC. Remaining valid portions of
   the watch will likely be allowed to expire at that time.

   DISCUSSION...A cluster of strong thunderstorms is ongoing as of
   01:45 UTC across a small part of north-central OR, namely Morrow and
   Gilliam Counties. Latest objective analysis suggests that the local
   environment remains at least marginally unstable with increasing
   convective inhibition. As such, the expectation is for a gradual
   decrease in storm intensity through 03 UTC. Prior to the time,
   constructive storm interactions could lead to periods of
   intensification, with an associated risk for marginally severe hail
   and/or wind gusts.

   Should current storm trends continue, the remaining valid portion of
   Severe Thunderstorm Watch 248 will likely be allowed to expire at 03
   UTC.

   ..Mead.. 05/29/2026

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

   ATTN...WFO...PDT...PQR...

   LAT...LON   45841955 45341944 45101967 44952059 44832120 45272158
               45572150 45712118 45782021 45841955 

   MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN