Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 251, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Mar 13, 1999, 12:20 PM CST for Lamar 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 13, 1999, 12:20 PM CST (18:20 UTC)
- Expired
- Mar 13, 1999, 1:10 PM CST
- In force
- 50 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Lamar County, MS
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 13, 10:00 AM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.3 hours before the alert went out and 108 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
- 553 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 406 m²/s²
- 0-3 km storm-relative helicity
- 553 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Mar 13, 10:35 AM CST, 1 hour 45 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 140400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1035 AM CST SAT MAR 13 1999 ...TORNADO WATCH IN EFFECT FOR MUCH OF SOUTH MISSISSIPPI UNTIL 400 PM... A LOW PRESSURE SYSTEM IN CENTRAL LOUISIANA WILL MOVE NORTHEAST AT 20 MPH AND TRIGGER SCATTERED TO NUMEROUS THUNDERSTORMS OVER CENTRAL AND SOUTH PORTIONS OF THE AREA. A FEW OF THE STORMS MAY BE SEVERE MAINLY SOUTHEAST OF A MERIDIAN TO BROOKHAVEN LINE THROUGH EARLY EVENING WITH POTENTIAL LARGE HAIL AND DAMAGING WINDS. AN ISOLATED TORNADO IS ALSO POSSIBLE IN SOUTHEAST PORTIONS. LOCALLY HEAVY RAINS MAY PRODUCE FLOODING DURING THE AFTERNOON HOURS. A COLD FRONT SHOULD SWEEP THROUGH THE REGION TONIGHT PUSHING ALL OF THE THUNDERSTORMS OFF TO THE EAST BEFORE MIDNIGHT. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL BE NEEDED THIS AFTERNOON THROUGH EARLY TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEBSITE AT: HTTP://WWW.JANNWS.STATE.MS.US
Special weather statement, Mar 13, 10:35 AM CST, 1 hour 45 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 140400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1035 AM CST SAT MAR 13 1999 ...TORNADO WATCH IN EFFECT FOR MUCH OF SOUTH MISSISSIPPI UNTIL 400 PM... A LOW PRESSURE SYSTEM IN CENTRAL LOUISIANA WILL MOVE NORTHEAST AT 20 MPH AND TRIGGER SCATTERED TO NUMEROUS THUNDERSTORMS OVER CENTRAL AND SOUTH PORTIONS OF THE AREA. A FEW OF THE STORMS MAY BE SEVERE MAINLY SOUTHEAST OF A MERIDIAN TO BROOKHAVEN LINE THROUGH EARLY EVENING WITH POTENTIAL LARGE HAIL AND DAMAGING WINDS. AN ISOLATED TORNADO IS ALSO POSSIBLE IN SOUTHEAST PORTIONS. LOCALLY HEAVY RAINS MAY PRODUCE FLOODING DURING THE AFTERNOON HOURS. A COLD FRONT SHOULD SWEEP THROUGH THE REGION TONIGHT PUSHING ALL OF THE THUNDERSTORMS OFF TO THE EAST BEFORE MIDNIGHT. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL BE NEEDED THIS AFTERNOON THROUGH EARLY TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEBSITE AT: HTTP://WWW.JANNWS.STATE.MS.US
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 7:11 AM CST | Severe Thunderstorm Warning | JAN | Adams, Jefferson | 49 min |
| Mar 13, 7:39 AM CST | Severe Thunderstorm Warning | JAN | Franklin | 46 min |
| Mar 13, 7:58 AM CST | Severe Thunderstorm Warning | JAN | Jefferson | 32 min |
| Mar 13, 8:17 AM CST | Severe Thunderstorm Warning | JAN | Copiah | 48 min |
| Mar 13, 8:42 AM CST | Severe Thunderstorm Warning | JAN | Hinds | 48 min |
| Mar 13, 8:54 AM CST | Severe Thunderstorm Warning | JAN | Rankin, Simpson | 46 min |
| Mar 13, 9:33 AM CST | Severe Thunderstorm Warning | JAN | Scott, Smith | 47 min |
| Mar 13, 11:45 AM CST | Severe Thunderstorm Warning | JAN | Marion | 50 min |
| Mar 13, 1:30 PM CST | Flash Flood Warning | JAN | Lamar, Marion | 2 hr |
| Mar 13, 1:30 PM CST | Flash Flood Warning | JAN | Forrest | 2 hr |
| Mar 13, 2:01 PM CST | Flash Flood Warning | JAN | Jones | 119 min |
| Mar 13, 2:40 PM CST | Flash Flood Warning | JAN | Clarke | 2 hr |
| Mar 13, 3:26 PM CST | Flash Flood Warning | JAN | Forrest, Lamar | 2 hr |
| Mar 13, 3:26 PM CST | Flash Flood Warning | JAN | Marion | 2 hr |
| Mar 13, 3:55 PM CST | Flash Flood Warning | JAN | Jones | 95 min |
| Mar 13, 6:23 AM CST | Severe Thunderstorm Warning | JAN | Catahoula | 47 min |
| Mar 13, 6:54 AM CST | Severe Thunderstorm Warning | JAN | Concordia | 36 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.