One thunderstorm that developed near West Carroll Parish was able to produce damaging winds.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS JAN wrote it up.
One thunderstorm that developed near West Carroll Parish was able to produce damaging winds.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jackson, MS wrote its last area forecast discussion before the first event at May 20, 8:32 PM CST, 6 hours 28 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE JACKSON MS
932 PM CDT FRI MAY 20 2011
.UPDATE...LINE OF SHOWERS AND THUNDERSTORMS ONGOING THIS EVENING TO
OUR WEST. SOME OF THESE STORMS HAVE BEEN SEVERE AS A STRONG SHORTWAVE
NEARS THE REGION. HI-RES MODEL CONSENSUS DEPICTS THIS ACTIVITY
WEAKENING AS IT GETS CLOSER. HOWEVER....STILL CANT RULE OUT THE
POTENTIAL THAT SOME OF THIS AS IT GETS INTO THE CWA WILL BE STRONG TO
SEVERE WITH HAIL AND WIND BEING THE MAIN THREATS. MOST HI-RES WRF
MODELS DO NOT SHOW MUCH OF ANYTHING MOVING INTO THE REGION BUT
WHATEVER DOES SHOULD BE WEAKENING AS IT TREKS EAST. GOING FORECAST
HANDLES THIS WELL AND POPS WERE ONLY ADJUSTED TO REMOVE WORDING FOR
EARLY IN THE EVENING AS THIS ACTIVITY LOOKS TO GET INTO THE REGION
CLOSER TO MIDNIGHT. OTHERWISE...WARM NIGHT EXPECTED AS MOISTURE
CONTINUES TO SEEP BACK INTO THE REGION. FLASH FLOOD WATCH LOOKS GOOD
FOR NOW AS ADDITIONAL RAINFALL OVER THE FLOODED AREAS WILL AGGRAVATE
ISSUES AND STORMS LOOK TO TRAIN OVER THE SAME LOCATIONS.
&&
.AVIATION...STORM ACTIVITY STILL TO THE WEST. LOOKS LIKE IT MAY
AFFECT WESTERN TAF SITES CLOSER TO 05-07Z. VFR PREVAILING UNTIL THIS
OCCURS AS MOST SITES WILL REMAIN RATHER QUIET TONIGHT. OVERNIGHT AND
EARLY SAT MORNING...LOOK FOR MAINLY MVFR CEILINGS TO
DEVELOP WITH SOME LOW END POTENTIAL FOR IFR CEILINGS AT A FEW SITES.
&&
.PRELIMINARY POINT TEMPS/POPS...
JACKSON 68 87 70 90 / 16 25 13 9
MERIDIAN 63 88 67 91 / 9 16 10 8
VICKSBURG 70 87 69 89 / 22 27 18 11
HATTIESBURG 68 89 69 90 / 6 8 7 7
NATCHEZ 70 88 69 87 / 18 18 10 8
GREENVILLE 68 86 70 89 / 35 47 29 16
GREENWOOD 68 86 68 89 / 21 40 23 12
&&
.JAN WATCHES/WARNINGS/ADVISORIES...
MS...FLASH FLOOD WATCH UNTIL 4 AM CDT SATURDAY FOR MSZ018-034-035-
040>042-047-053.
LA...FLASH FLOOD WATCH UNTIL 4 AM CDT SATURDAY FOR LAZ009-016-024>026.
AR...FLASH FLOOD WATCH UNTIL 4 AM CDT SATURDAY FOR ARZ075.
&&
28HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 221 PM CDT FRI MAY 20 2011 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025-034-035-040- 041-211930- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR- SUNFLOWER-LEFLORE-WASHINGTON-HUMPHREYS-ISSAQUENA-SHARKEY- 221 PM CDT FRI MAY 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TONIGHT AND SATURDAY SOME SEVERE STORMS WILL BE POSSIBLE THIS EVENING AND OVERNIGHT AS A COMPLEX OF STORMS DEVELOPS TO OUR WEST. ALL INDICATIONS IS THAT THE COMPLEX OF STORMS WILL GRADUALLY WEAKEN AS IT APPROACHES THE MISSISSIPPI RIVER LATER TONIGHT. HOWEVER...THE RISK FOR DAMAGING WINDS AND QUARTER SIZED HAIL WILL BE THE GREATEST FOR LOCATIONS MAINLY WEST OF A GREENWOOD TO VICKSBURG TO NATCHEZ LINE. SOME LOCALLY HEAVY RAINFALL WILL ALSO BE POSSIBLE...UP TO AN INCH...AND WILL POSE PROBLEMS FOR ANY AREA THAT IS EXPERIENCING BACKWATER FLOODING FROM THE MISSISSIPPI RIVER. A FEW STRONG TO SEVERE STORMS WILL BE POSSIBLE FROM SATURDAY AFTERNOON INTO A PORTION OF SATURDAY EVENING. THIS ACTIVITY WILL BE POSSIBLE FOR AREAS MAINLY NORTH OF A LAKE PROVIDENCE LOUISIANA TO EUPORA MISSISSIPPI LINE. WIND GUSTS FROM 50-60 MPH AND QUARTER SIZED HAIL WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY STRONG TO SEVERE STORMS WILL BE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY ALONG AND AHEAD OF A STRONG COLD FRONT THAT IS FORECAST TO CROSS OUR REGION. RESIDENTS SHOULD KEEP IN TOUCH WITH THE LATEST FORECASTS CONCERNING THIS POTENTIAL SEVERE WEATHER. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS WILL LIKELY BE NEEDED LATE THIS EVENING AND FOR A PORTION OF SATURDAY...THEN AGAIN FOR THE MIDDLE OF NEXT WEEK. MSZ026>029-032-036-037-042>044-047>050-053>055-059>062-211930- GRENADA-CARROLL-MONTGOMERY-WEBSTER-CHOCTAW-HOLMES-ATTALA-YAZOO- MADISON MS-LEAKE-WARREN-HINDS-RANKIN-SCOTT-CLAIBORNE-COPIAH- SIMPSON-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN- 221 PM CDT FRI MAY 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TONIGHT AND SATURDAY A FEW STRONG...POSSIBLE SEVERE STORMS...WILL BE POSSIBLE LATER THIS EVENING AND OVERNIGHT AS A COMPLEX OF STORMS SHIFTS INTO THE AREA. THIS COMPLEX IS EXPECTED TO WEAKEN AS IT CROSSES THE MISSISSIPPI RIVER. HOWEVER...A RISK FOR WIND GUSTS TO 45 OR 60 MPH WILL STILL BE POSSIBLE FOR LOCATIONS WITHIN THE I-55 CORRIDOR. A FEW STRONG TO SEVERE STORMS WILL BE POSSIBLE FROM SATURDAY AFTERNOON INTO A PORTION OF SATURDAY EVENING. THIS ACTIVITY WILL BE POSSIBLE FOR AREAS MAINLY NORTH OF A LAKE PROVIDENCE LOUISIANA TO EUPORA MISSISSIPPI LINE. WIND GUSTS FROM 50-60 MPH AND QUARTER SIZED HAIL WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY STRONG TO SEVERE STORMS WILL BE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY ALONG AND AHEAD OF A STRONG COLD FRONT THAT IS FORECAST TO CROSS OUR REGION. RESIDENTS SHOULD KEEP IN TOUCH WITH THE LATEST FORECASTS CONCERNING THIS POTENTIAL SEVERE WEATHER. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS MAY BE NEEDED LATE TONIGHT AND FOR A PORTION OF SATURDAY...THEN AGAIN FOR THE MIDDLE OF NEXT WEEK. MSZ030-031-033-038-039-045-046-051-052-056>058-063>066-072>074- 211930- CLAY-LOWNDES-OKTIBBEHA-WINSTON-NOXUBEE-NESHOBA-KEMPER-NEWTON- LAUDERDALE-SMITH-JASPER-CLARKE-LAWRENCE-JEFFERSON DAVIS-COVINGTON- JONES-MARION-LAMAR-FORREST- 221 PM CDT FRI MAY 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TONIGHT AND SATURDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SATURDAY NIGHT THROUGH THURSDAY STRONG TO SEVERE STORMS WILL BE POSSIBLE WEDNESDAY NIGHT INTO THURSDAY ALONG AND AHEAD OF A STRONG COLD FRONT THAT IS FORECAST TO CROSS OUR REGION. RESIDENTS SHOULD KEEP IN TOUCH WITH THE LATEST FORECASTS CONCERNING THIS POTENTIAL SEVERE WEATHER. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS MAY BE NEEDED FOR THE MIDDLE OF NEXT WEEK. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. CME
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
239 AM CDT SAT MAY 21 2011
ARZ074-LAZ007-015-023-210840-
ASHLEY AR-MOREHOUSE LA-RICHLAND LA-FRANKLIN LA-
239 AM CDT SAT MAY 21 2011
...LINE OF THUNDERSTORMS CAPABLE OF PRODUCING STRONG WIND GUSTS...
A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING 40 TO 50 MPH
WINDS WAS LOCATED FROM CROSSETT TO 20 MILES SOUTHWEST OF MANGHAM AT
238 AM CDT...MOVING NORTHEAST AT 25 MPH.
PEOPLE IN ASHLEY COUNTY...AND WEST CENTRAL FRANKLIN...WESTERN
RICHLAND AND MOREHOUSE PARISHES SHOULD MONITOR THESE STORMS CLOSELY.
LAT...LON 3239 9200 3252 9191 3267 9191 3266 9194
3271 9197 3271 9203 3335 9198 3341 9184
3340 9156 3276 9161 3205 9182 3202 9189
3208 9192 3213 9187 3217 9191 3217 9197
3220 9201 3227 9200 3228 9203
TIME...MOT...LOC 0738Z 242DEG 16KT 3330 9189 3261 9194
3199 9213
EECThe Jackson/Brandon,MS radar (KDGX), 151 km away, was scanning. The volume nearest the first event began at 08:59 UTC.
1 thunderstorm wind. Local standard time, as filed.
Several trees were blown down along Highway 2 west of Oak Grove, with at least 1 tree blocking the road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2011Every state in 2011This day in weather historyWarnings in Louisiana, May 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 305968.