STORM SUMMARY NUMBER 4 FOR CENTRAL U.S. HEAVY RAIN EVENT
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
400 AM CDT SUN APR 24 2011
 
...A SIGNIFICANT HEAVY RAINFALL EVENT IS SETTING UP OVER THE
MIDDLE MISSISSIPPI AND OHIO RIVER VALLEYS AND IS EXPECTED TO
PERSIST THROUGH THE MIDDLE OF THE WEEK...
 
FLOOD AND FLASH FLOOD WATCHES AND WARNINGS ARE CURRENTLY IN EFFECT
IN A LINE EXTENDING FROM NORTHEASTERN OKLAHOMA INTO THE CENTRAL
APPALACHIANS. FLOOD WARNINGS ARE ALSO IN EFFECT ALONG MOST OF THE
MISSISSIPPI RIVER.
 
FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

AT 300 AM CDT...A 998 MB...29.47 INCHES...LOW PRESSURE CENTER WAS
LOCATED OVER NORTHERN QUEBEC...WITH A TRAILING COLD/STATIONARY
FRONT EXTENDING SOUTHWARD THROUGH THE NORTHEAST AND SOUTHWESTWARD
ACROSS THE OHIO VALLEY...LOWER/MIDDLE MISSISSIPPI VALLEY...AND
SOUTHERN PLAINS.  MULTIPLE WAVES OF LOW PRESSURE WERE LOCATED
ALONG THE BOUNDARY...INCLUDING A 1012 MB LOW OVER SOUTHEASTERN
MISSOURI AND 1007 MB LOW OVER NORTH CENTRAL TEXAS.  NATIONAL
WEATHER SERVICE RADARS AND SURFACE OBSERVATIONS INDICATED WIDELY
SCATTERED SHOWERS ALL ALONG THE BOUNDARY.  MORE ORGANIZED AREAS OF
CONVECTION WERE LOCATED NEAR THE SURFACE WAVES...OVER SOUTHEASTERN
MISSOURI/SOUTHERN ILLINOIS AND ACROSS OKLAHOMA.  

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 700 AM CDT FRI APR
22 THROUGH 400 AM CDT SUN APR 24...

...ARKANSAS...
ROGERS 2 SSW                          5.07                     
BELLA VISTA 2 E                       4.43                     
DECATUR 3 ESE                         4.14                     
BENTONVILLE                           3.60                     
HARRISON/BOONE CO. ARPT               3.35                     
FAYETTEVILLE/DRAKE FIELD              3.31                     
ROGERS/CARTER FIELD                   3.00                     
SILOAM SPRINGS/SMITH FIELD            2.27                     

...ILLINOIS...
ROBINSON 2 W                          3.05                     
CHESTER 2 SSE                         2.90                     
CARBONDALE/MURPHYSBORO                2.87                     
CARMI MUNI ARPT                       2.68                     
MOUNT VERNON/OUTLAND AIRPORT          2.35                     
OLD SHAWNEETOWN                       2.18                     
LAWRENCEVILLE-VINCENNES INTL AP       2.08                     

...INDIANA...
PALMYRA 4 ESE                         3.21                     
EVANSVILLE RGNL ARPT                  3.02                     
HUNTINGBURG                           3.02                     
ELLISTON                              2.77                     
JASPER 6 ESE                          2.73                     
CHARLESTOWN 3 N                       2.54                     
BLOOMINGTON/MONROE CO. ARPT           2.34                     

...KENTUCKY...
HENDERSON CITY                        3.65                     
FRANKFORT/CAPITAL CITY ARPT           3.41                     
LOUISVILLE/STANDIFO                   2.90                     
LAWRENCEBURG 4 N                      2.66                     
ELIZABETHTOWN 2 SE                    2.42                     
FORT KNOX AAF                         2.33                     
LEXINGTON/BLUE GRASS FIELD            2.16                     
OWENSBORO/DAVIESS CO. APT             2.09                     
PADUCAH/BARKLEY                       2.09                     

...MISSOURI...
WINONA 3 SW                           5.33                     
POPLAR BLUFF MUNI ARPT                4.03                     
CAPE GIRARDEAU MUNI ARPT              3.96                     
WEST PLAINS MUNI ARPT                 3.80                     
ELLSINORE 5 WNW                       3.49                     
EMERALD BEACH 3 S                     3.46                     
MARBLE HILL                           3.00                     
ST LOUIS/LAMBERT INTL ARPT            1.40                     

...OHIO...
CLEVES 3 NNW                          2.83                     
KUGLER MILL 2 S                       2.47                     
SHARONVILLE 1 SE                      2.32                     
MOUNT AIRY 2 SW                       2.24                     
CINCINNATI 9 NW                       2.19                     

...OKLAHOMA...
COOKIETOWN 6 WNW                      5.03                     
WESTVILLE                             2.29                     
BUNCH 1 N                             2.08                     


THE SURFACE BOUNDARY SITUATED OVER THE OHIO VALLEY AND INTO THE
SOUTHERN PLAINS WILL REMAIN QUASI-STATIONARY THROUGH AT LEAST
MONDAY. WARM AND HUMID AIR FROM THE GULF OF MEXICO WILL BE SURGING
NORTHWARD...SUPPORTING THE CONTINUING DEVELOPMENT OF SHOWERS ALONG
THE BOUNDARY.  THIS WILL RESULT IN PERIODS OF MODERATE TO HEAVY
RAIN...ALONG WITH THUNDERSTORMS...WITH RAINFALL AMOUNTS RANGING
FROM 2 TO 10 INCHES THROUGH WEDNESDAY. THE HIGHEST TOTALS ARE
EXPECTED TO BE OVER THE MIDDLE MISSISSIPPI VALLEY AND THE LOWER
OHIO RIVER VALLEY. GIVEN THE ALREADY SATURATED GROUNDS AND HIGH
RIVER LEVELS...FLOODING WILL BE AN ISSUE IN THESE AREAS OVER THE
NEXT SEVERAL DAYS. IN ADDITION...SEVERE WEATHER...INCLUDING
HAIL...HIGH WINDS AND TORNADOES...WILL BE POSSIBLE WITH THE
STRONGEST STORMS.

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE HYDROMETEOROLOGICAL
PREDICTION CENTER AT 1000 AM CDT. PLEASE REFER TO YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS
EVENT.

GERHARDT