AWUS01 KWNH 261347
FFGMPD
TXZ000-261945-

Mesoscale Precipitation Discussion 0247
NWS Weather Prediction Center College Park MD
946 AM EDT Tue May 26 2026

Areas affected...West Texas

Concerning...Heavy rainfall...Flash flooding likely

Valid 261345Z - 261945Z

SUMMARY...A line of training thunderstorms across portions of west
Texas this morning contains cells capable of 2+ inches/hour
rainfall rates. Flash flooding is occurring resulting from these storms.

DISCUSSION... An area of convection at the base of a highly
negatively tilted trough over New Mexico has been producing 2+
inch per hour rainfall rates across a portion of west Texas this
morning. These storms have been slow-moving, allowing for the
heavy rain rates to persist over the same areas for an extended
period. At the south end of the line, much faster moving storms
are pressing east just north of the Rio Grande in the Big Bend
region. CAMs guidance is suggesting that once the storms to the
south "catch up" longitudinally with the line just east of
Midland, the whole new line of storms will take on a faster
forward speed towards the east. This will reduce the flash
flooding threat a bit going forward, but rainfall rates with the
strongest cells will still pose a localized flash flooding risk
with 1-2 inches/hour still possible.

As the line progresses eastward towards San Angelo this afternoon,
with daytime heating, expect multiple individual slow-moving
thunderstorm cells capable of heavy rainfall rates to merge with
the line. Where these mergers occur, localized flash flooding will
be possible due to the extended period of time any heavy rain will
occur over those areas. Many of the river valleys tend to
efficiently convert heavy rainfall to significant river rises in
this area, worsening any potential flash flooding. Behind the line
of storms, cold pools and much more stable air will end the heavy
rain and flash flooding threat.

Wegman

ATTN...WFO...EWX...LUB...MAF...SJT...

ATTN...RFC...FWR...TUA...NWC...

LAT...LON   34230074 33800026 33060002 32639985 32019952
            31059940 29999978 29100049 29340108 29660143
            29760198 29740237 29720272 29870326 30170336
            30450321 30750296 31110275 31770249 32570201
            34180164

$$
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