####018001769#### AWUS01 KWNH 052206 FFGMPD TXZ000-060204- Mesoscale Precipitation Discussion 0327 NWS Weather Prediction Center College Park MD 605 PM EDT Fri Jun 05 2026 Areas affected...Deep South Texas Concerning...Heavy rainfall...Flash flooding likely Valid 052204Z - 060204Z Summary...Recent development of convection near the Brownsville, TX Metro area and along the Lower Rio Grande Valley poses a flash flood risk. Discussion...Radar trends depict several slow-moving cells over Deep South Texas that have persisted for several hours and produced occasional 3 inch/hr rain rates - primarily over rural areas where FFG thresholds are quite high (3-4 inches/hr, locally higher). Flash flood potential has been relatively isolated/sparse. Recent radar/satellite depicts convection forming nearer to the populated areas of the Lower Rio Grande Valley (near/just northeast of Brownsville and just south of McAllen). These cells are in a similar environment as the aforementioned cells farther north across Deep South Texas, and have potential for 3 inch/hr rain rates over more sensitive, urbanized locales. The risk for impacts from flash flooding have increased over the past 30 minutes and will continue to do so while slow-moving cells continue over more sensitive/urban areas. This risk will likely continue for at least a couple hours. Models suggest that convection will be primarily diurnally driven and should lessen in intensity/coverage after sunset. Cook ...Please see www.wpc.ncep.noaa.gov for graphic product... ATTN...WFO...BRO...CRP... ATTN...RFC...FWR...NWC... LAT...LON 27789791 27469736 26429714 25769721 25819818 26359895 27569892 ####018001075#### PENA01 KWNH 051200 @UHPISF000CN MPDSUM@V2.0@0101700060@12050626@@0NMCGPHMPD U0@!' `' ` @ & B7)p&PNAM02@@#^ ~{|zzy{z{||@@^@@^@@; { ~}{{ky|{{{z{{{{|{z{z{||}@@ {@@ {@@P#}|||{zz||{{z|zzzz{{{z|||}|}}~}@@#@@#@@0325 @@N0326 @@^0327 @@d&MESOSCALE DISCUSSION SUMMARY GRAPHIC @@d& OF ALL VALID MESOSCALE DISCUSSIONS AT @@d& TIME OF PRODUCT CREATION:@@d& ISSUED 06/05/2026 2206Z @@ dNOAA/NWS/NCEP@@d WEATHER PREDICTION CENTER @@d FOR COLOR VERSION SEE: @@d WWW.WPC.NCEP.NOAA.GOV @