Alert archive / Mississippi / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 21, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Apr 10, 1991, 2:14 AM CDT for Harrison County, Mississippi. It was in force for 61 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 10, 1991, 2:14 AM CDT (07:14 UTC)
- Expired
- Apr 10, 1991, 3:15 AM CDT
- In force
- 61 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Harrison County, MS
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 10, 2:14 AM CDT | Hail 1 | Harrison, MS |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 7.2 hours before the alert went out and 62 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 641 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1423 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 100715 SVRMOB MSC047-100815- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 214 AM CDT WED APR 10 1991 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 315 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEAST MISSISSIPPI ...HARRISON COUNTY AT 210 AM MOBILE RADAR INDICATED A SEVERE THUNDERSTORM IN WESTERN HARRISON COUNTY MISSISSIPPI. IT WAS JUST NORTH OF VIDALIA AND WAS MOVING TO THE SOUTHEAST AT 20 MILES AN HOUR TOWARD LYMAN AND THEN BILO SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 9, 8:16 PM CDT, 5 hours 58 minutes before
ALZ013-015-016-MSZ014-013-100245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 815 PM CDT TUE APR 9 1991 ...SEVERE THUNDERSTORM WATCH NUMBER 111 CONTINUES UNTIL 11 PM CDT FOR SOUTHWEST ALABAMA. AT 810 PM CDT RADAR SHOWED A LINE OF VERY STRONG THUNDERSTORMS FROM NORTHWEST OF MONTGOMERY TO NEAR MCCOMB MISSISSIPPI. MOVEMENT WAS EAST AT 25 MPH. OTHER SHOWERS AND THUNDERSTORMS WERE NEAR TROY AND NEAR NEW ORLEANS. A PATCHES OF LIG>HT RAIN WAS NOTED IN THE MOBILE AREA. A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE POSSIBILITY OF SEVERE WEATHER IN OR NEAR THE WATCH AREA. STAY TUNED TO THIS STATION FOR THE LATEST IN WEATHER INFORMATION.
Special weather statement, Apr 9, 10:05 PM CDT, 4 hours 9 minutes before
ALZ013-015-016-100415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOBILE AL 1000 PM CDT TUE APR 9 1991 ...SEVERE THUNDERSTORM WATCH NUMBER 111 CONTINUES UNTIL 11 PM CDT FOR SOUTHWEST ALABAMA. AT 10 PM CDT RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS FROM MONTGOMERY TO LAUREL MISSISSIPPI. STRONGEST STORMS WERE NEAR LAUREL MISSISSIPPI AND THOMASVILLE. MOVEMENT CONTINUES EAST AT 20 MPH. A BAND OF SHOWERS WAS IN THE GULF FROM JUST SOUTHWEST OF DAUPHIN ISLAND SOUTHWEST INTO THE GULF. MOVEMENT WAS EAST AT 20 MPH. NO SEVERE WEATHER HAS BEEN REPORTED TO THIS OFFICE TONIGHT...BUT A SEVERE THUNDERSTORM WATCH MEANS SEVERE WEATHER IS A POSSIBILITY IN OR NEAR THE WATCH AREA.
Special weather statement, Apr 10, 12:34 AM CDT, 1 hour 40 minutes before
FLZ001>004-ALZ010>018-300030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 1225 AM CDT WED APR 10 1991 ...STRONG THUNDERSTORMS OVER SOUTH ALABAMA WERE MOVING INTO NORTHWEST FLORIDA... AT 1225 AM CDT...A BAND OF RAIN WITH SOME STRONG THUNDERSTORMS WAS OVER SOUTH ALABAMA FROM NORTH MOBILE COUNTY EAST TO DOTHAN. THIS BAND WAS PUSHING SLOWLY SOUTH TOWARD THE COAST. STRONGEST AND MOST STORMS WERE ABOUT 60 MILES NORTHWEST AND NORTH OF PENSACOLA AND WERE MOVING EAST AND SOUTHEAST TOWARDS THE NORTH PORTIONS OF ESCAMBIA AND SANTA ROSA COUNTIES OF FLORIDA. OTHER THUNDERSTORMS WERE SCATTERED AROUND NORTHWEST FLORIDA WITH A FEW OVER SOUTHEAST MISSISSIPPI. ST[RONG GUSTY WINDS...FREQUENT LIGHTNING...HEAVY RAIN AND POSSIBLE HAIL ARE LIKELY WITH THE PASSAGE OF THESE STORMS.
Special weather statement, Apr 10, 1:29 AM CDT, 45 minutes before
FLZ001>004-ALZ010>018-MSZ012>014-LAZ010-013-014-100725- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PENSACOLA FL 125 AM CDT WED APR 10 1991 ...STRONG THUNDERSTORMS COVER MUCH OF NORTHWEST FLORIDA... AT 125 AM CDT...A BAND OF RAIN WITH SOME STRONG THUNDERSTORMS STRETCHED FROM MOBILE ALABAMA EAST ACROSS NORTHWEST FLORIDA TO THE APALACHICOLA RIVER. THESE STORMS WERE SPREADING SOUTH TOWARD THE COAST. STRONGEST AND MOST STORMS WERE WITHIN 50 MILES NORTHWEST...NORTH AND NORTHEAST OF PENSACOLA. THEY WERE MOVING TOWARD THE SOUTHEAST 25 TO 30 MILES AN HOUR. ISOLATED THUNDERSTORMS WERE OVER SOUTHEAST MISSISSIPPI WITH LARGE AREAS OF MOSTLY LIGHT RAIN OVER THE INTERIOR OF SOUTH ALABAMA. STRONG GUSTY WINDS...FREQUENT LIGHTNING...HEAVY RAIN AND POSSIBLE HAIL ARE LIKELY WITH THE PASSAGE OF THESE STORMS.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 10:51 PM CDT | Severe Thunderstorm Warning | MOB | Greene | 44 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.