Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 35, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Mar 2, 1999, 10:40 PM CST for Wayne County, Mississippi. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 2, 1999, 10:40 PM CST (04:40 UTC)
- Expired
- Mar 2, 1999, 11:30 PM CST
- In force
- 50 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
County Wayne County, MS
The radar
The Mobile radar (KMOB), 115 km from the middle of the area, began a volume at 04:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 2, 9:15 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 4.7 hours before the alert went out and 151 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
- 119 J/kg
- Mixed-layer CIN
- -151 J/kg
- Mixed-layer LCL
- 1658 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMOB 030440 RRA SVRMOB MSC111-131-153-030530- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 1040 PM CST TUE MAR 2 1999 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PERRY COUNTY IN SOUTHEASTERN MISSISSIPPI STONE COUNTY IN SOUTHEASTERN MISSISSIPPI WAYNE COUNTY IN SOUTHEASTERN MISSISSIPPI * UNTIL 1130 PM CST * AT 1036 PM CST... AS INDICATED BY DOPPLER RADAR A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM NEAR LAUREL TO NEAR PURVIS MISSISSIPPI. THE LINE OF SEVERE THUNDERSTORMS WERE MOVING EAST AT 45 TO 50 MPH. * THE SEVERE THUNDERSTORMS WILL REACH THE VICINITY OF WAYNESBORO TO NEW AUGUSTA TO WIGGINS BETWEEN 1045 PM AND 1115 PM. 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 DO NOT 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.
NWS Mobile, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 2, 2:30 PM CST, 8 hours 10 minutes earlier.
Area forecast discussion, Mar 2, 2:30 PM CST, 8 hours 10 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MOBILE AL 230 PM CST TUE MAR 2 1999 CURRENT SFC MAP INDICATES SFC LOW PRES SYSTEMS LOCATED OVER NERN TX AND MO/IL BORDER AREA...WITH FRONTAL BOUNDARY EXTENDING ACROSS BOOT OF MO...ACROSS AR AND INTO ERN TX. THIS POSITION INITIALIZED WELL AT 18Z WITH THIS MORNINGS ETA MODEL. CONTINUED PROGRESSIVE UPPER FLOW WILL MOVE SYSTEM RAPIDLY E ACROSS FA TONIGHT...EXITING THE REGION AROUND DAYBREAK WED. POSITION OF STRENGTHENING SHORTWAVE CURRENTLY OVER ERN KS ALSO INITIALIZED WITH 12Z ETA WELL. THIS FEATURE PROGGED TO DROP INTO TN VALLEY REGION 06Z-12Z WED...DIGGING UPPER TROF OVER ERN THIRD OF COUNTRY. PRIMARY DYNAMICS ASSOCIATED WITH THIS FEATURE LOOK TO REMAIN N OF FA TONIGHT...BUT WEAKER UPPER FEATURE AND FRONTAL BOUNDARY WILL MOVE ACROSS FA TONIGHT...WITH PRIMARY EFFECTS OVER REGION BETWEEN ABOUT 04Z AND 12Z WED. MAX UVVS AND INSTABILITIES... APPEAR OVER FA AROUND 06Z TIMEFRAME. CAPES 1000-2500 J/KG PROGGED OVER COASTAL AREAS...BUT HIGHEST HELICITIES REMAIN WELL NORTH OF FA. BELIEVE SQUALL LINE WILL DEVELOP AND MOVE E ACROSS FA JUST AHEAD OF COLD FRONT TONIGHT. SPC HAS AREA OUTLOOKED SLIGHT SVR TONIGHT...AND UNIDIRECTIONAL VERTICAL SPEED SHEAR...MID LEVEL DRY AIR AT ONSET OF CONVECTION...AND 50H TEMPS AROUND -18C WOULD SUGGESTS THIS TO BE A POSSIBILITY WITH DAMAGING WINDS AND HAIL BEING THE PRIMARY THREAT. CURRENTLY UPDATING HAZARDOUS WEATHER OUTLOOK (SPSMOB). LIKE HIER AVN GUIDANCE POPS FOR TONIGHT. TEMP GUIDANCE COOLER THAN PREVIOUS RUNS...BUT IN FAIRLY CLOSE AGREEMENT AND WILL GENERALLY ACCEPT. OVER THE COASTAL WATERS...FRONTAL BOUNDARY EXPECTED TO MOVE ACROSS THE COASTAL WATERS TONIGHT...WITH SWLY WINDS INCREASING TO 15 KT AND GUSTY BY 06Z WED...SHIFTING TO THE W AND NW AND INCREASING TO 20 KT AND GUSTY AROUND 12Z WED WITH FROPA. TIGHT PRES GRADIENT BEHIND THE FRONT WILL KEEP WINDS IN 20 KT AND GUSTY RANGE WED...GRADUALLY BECMG NELY 10 TO 15 KT WED NIGHT. SCATTERED TO NUMEROUS SHOWERS AND TSTMS OVER THE COASTAL WATERS THIS EVENING...ENDING WITH THE WINDSHIFT. SCAS NEEDED THROUGH FCST PERIOD. MOB 51/59/35/65 7200 PNS 55/62/37/62 7300 DTS 55/63/37/62 7300 GZH 48/53/30/63 7200 12
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 10:40 PM CST | Severe Thunderstorm Warning | MOB | Perry, Stone | 50 min |
Nearby
Severe Thunderstorm Warnings in Mississippi, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.