Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 21, NWS Mobile, AL
NWS Mobile, AL issued this severe thunderstorm warning at Jan 22, 1999, 9:20 PM CST for Greene County, Perry County, Wayne County, Mississippi. It was in force for 40 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
- Jan 22, 1999, 9:20 PM CST (03:20 UTC)
- Expired
- Jan 22, 1999, 10:00 PM CST
- In force
- 40 min
- Issued by
- NWS Mobile, AL
- Area
- Whole counties
Counties Greene County, MS, Perry County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 90 km from the middle of the area, began a volume at 03:24 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 |
|---|---|---|---|
| Jan 22, 7:00 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 3.3 hours before the alert went out and 150 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
- 1843 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 564 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 283 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 12.2
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KMOB 230321 RRA SVRMOB MSC041-111-153-230400- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOBILE AL 920 PM CST FRI JAN 22 1999 THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... GREENE COUNTY IN SOUTHEASTERN MISSISSIPPI PERRY COUNTY IN SOUTHEASTERN MISSISSIPPI WAYNE COUNTY IN SOUTHEASTERN MISSISSIPPI * UNTIL 1000 PM CST * AT 920 PM CST... AS INDICATED BY DOPPLER RADAR A LINE OF SEVERE THUNDERSTORMS WAS LOCATED FROM EAST OF LAUREL TO JUST WEST OF NEW AUGUSTA...MOVING TO THE EAST AT 25 MPH. WIND DAMAGE HAS BEEN REPORTED WITH THESE STORMS IN THE PAST FEW MINUTES. * THE SEVERE THUNDERSTORM WILL MOVE TO NEAR A WAYNESBORO TO BEAUMONT LINE BY 945 PM. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
The office that day
Everything else NWS Mobile, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 6:21 PM CST | Tornado Warning | MOB | Wayne | 39 min |
| Jan 22, 7:58 PM CST | Tornado Warning | MOB | Wayne | 47 min |
| Jan 22, 8:38 PM CST | Tornado Warning | MOB | Greene | 37 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.