740  
FOUS30 KWBC 180722  
QPFERD  
 
EXCESSIVE RAINFALL DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
222 AM EST SAT JAN 18 2025  
 
DAY 1  
VALID 12Z SAT JAN 18 2025 - 12Z SUN JAN 19 2025  
 
...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL ACROSS FAR  
SOUTHERN GEORGIA INTO NORTH FLORIDA...  
 
A CORRIDOR OF MOISTURE CONVERGENCE IN THE WARM SECTOR OF A  
DEVELOPING SOUTHEAST U.S. SURFACE LOW, IN THE PRESENCE OF PWS ON  
THE ORDER OF 1.5 TO 1.75 INCHES, WILL FUEL THE DEVELOPMENT OF  
MULTIPLE ROUNDS OF SHOWERS AND THUNDERSTORMS ACROSS NORTHERN  
FLORIDA AND ACROSS THE SOUTHERN TIER OF COUNTIES IN GEORGIA. THE  
MAJORITY OF THE HEAVIER RAINFALL SHOULD HAPPEN BETWEEN 00Z AND 12Z  
SUNDAY WHEN MIXED LAYER CAPE RISES INTO THE 250-750 J/KG RANGE WITH  
SOUTHWESTERLY FLOW FROM THE EASTERN GULF. THIS COULD RESULT IN  
RAINFALL RATES IN EXCESS OF AN INCH PER HOUR WITH THE MOST  
PERSISTENT CELLS. SOME OF THE CAM GUIDANCE INDICATES SWATHS OF 2-3  
INCH QPF DURING THIS PERIOD, AND THIS MAY LEAD TO SOME MINOR  
INSTANCES OF FLOODING IN POOR DRAINAGE AREAS. THE AXIS OF HEAVY  
RAINFALL IS EXPECTED TO BECOME MORE PROGRESSIVE BY 12Z SUNDAY AND  
BEYOND ACROSS THE CENTRAL FLORIDA PENINSULA.  
 
HAMRICK  
 
DAY 2  
VALID 12Z SUN JAN 19 2025 - 12Z MON JAN 20 2025  
 
THE PROBABILITY OF RAINFALL EXCEEDING FLASH FLOOD GUIDANCE IS LESS  
THAN 5 PERCENT.  
 
HAMRICK  
 
DAY 3  
VALID 12Z MON JAN 20 2025 - 12Z TUE JAN 21 2025  
 
THE PROBABILITY OF RAINFALL EXCEEDING FLASH FLOOD GUIDANCE IS LESS  
THAN 5 PERCENT.  
 
HAMRICK  
 
DAY 1 THREAT AREA: HTTPS://WWW.WPC.NCEP.NOAA.GOV/QPF/94EPOINTS.TXT  
DAY 2 THREAT AREA: HTTPS://WWW.WPC.NCEP.NOAA.GOV/QPF/98EPOINTS.TXT  
DAY 3 THREAT AREA: HTTPS://WWW.WPC.NCEP.NOAA.GOV/QPF/99EPOINTS.TXT  
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