197  
AWUS01 KWNH 290325  
FFGMPD  
TXZ000-290920-  
 
MESOSCALE PRECIPITATION DISCUSSION 0284  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
1123 PM EDT SUN MAY 28 2017  
 
AREAS AFFECTED...SOUTH TX  
 
CONCERNING...HEAVY RAINFALL...FLASH FLOODING POSSIBLE  
 
VALID 290320Z - 290920Z  
 
SUMMARY...THUNDERSTORMS PRODUCING HEAVY RAINFALL RATES ARE  
EXPECTED TO SPREAD FURTHER EAST ACROSS SOUTH TX OVER THE NEXT  
SEVERAL HOURS. FLASH FLOODING IS POSSIBLE.  
 
DESCRIPTION...KDFX RADAR SHOWS SLOW MOVING THUNDERSTORMS PRODUCING  
RAINFALL RATES OF UP 2-3 INCHES/HR DRIFTING EAST FROM THE MIDDLE  
RIO GRANDE VALLEY INTO SOUTH TX ALONG AND WEST OF I-35. THIS  
CONVECTION IS FORECAST TO SPREAD FURTHER EAST INTO SOUTH TX THIS  
EVENING...WITH THE POTENTIAL FOR HEAVY RAINFALL RATES EXPECTED TO  
CONTINUE AS LOW LEVEL FLOW AMPLIFIES AHEAD OF AN APPROACHING WEAK  
SLOW MOVING MID-LEVEL SHORTWAVE. SURFACE DEW POINTS ARE IN THE  
MID 70S..WITH THE LATEST SPC MESOANALYSIS INDICATING PWS OF  
1.7-1.9 INCHES ACROSS MUCH OF THE REGION. THE 01Z RAP SHOWS PWS  
INCREASING TO AT OR ABOVE 2 INCHES AS MOISTURE POOLS ALONG AND  
AHEAD OF A COLD FRONT THAT HAS DROPPED SOUTH AND IS EXPECTED TO  
STALL ACROSS THE REGION. THE RAP ALSO SHOWS MUCAPES OF 3000-4000  
J/KG PERSISTING INTO THE OVERNIGHT HOURS. THE 01Z HRRR SHOWS  
ADDITIONAL RAINFALL ACCUMULATIONS OF UP TO 3-4 INCHES WITHIN THE  
HIGHLIGHTED AREA.  
 
PEREIRA  
   
..PLEASE SEE WWW.WPC.NCEP.NOAA.GOV FOR GRAPHIC PRODUCT
 
 
ATTN...WFO...BRO...CRP...EWX...HGX...  
 
ATTN...RFC...WGRFC...  
 
LAT...LON 28999782 28829652 27959724 27259752 26919798  
26819848 26769924 27489962 28200021 28749896  
 
 
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