Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 367, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at May 4, 1999, 11:28 AM CDT for Clarke County, Lauderdale County, Mississippi. It was in force for 62 min. 3 reports 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
- May 4, 1999, 11:28 AM CDT (16:28 UTC)
- Expired
- May 4, 1999, 12:30 PM CDT
- In force
- 62 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
Counties Clarke County, MS, Lauderdale County, MS
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 4, 11:45 AM CDT | Hail 0.88 | Meridian, MS | |
| May 4, 12:05 PM CDT | Hail 0.75 | Bailey, MS | |
| May 4, 12:11 PM CDT | Hail 0.75 | Ponta, 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.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 4.5 hours before the alert went out and 132 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
- 111 J/kg
- Mixed-layer CIN
- -567 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KJAN 041630 RRA SVRJAN MSC023-075-041730- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE JACKSON MS 1128 AM CDT TUE MAY 4 1999 THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CLARKE COUNTY IN EAST CENTRAL MISSISSIPPI LAUDERDALE COUNTY IN EAST CENTRAL MISSISSIPPI * UNTIL 1230 PM CDT * AT 1127 AM CDT... RADAR INDICATED A RAPIDLY DEVELOPING SEVERE THUNDERSTORM 15 MILES SOUTH OF MERIDIAN... MOVING NORTH AT 40 MPH. * SOME LOCATIONS IN THE PATH OF THIS STORM INCLUDE... MERIDIAN AT 1145 AM CDT NELLIEBURG AT 1145 AM CDT MARION AT 1150 AM CDT THIS STORM HAS A HISTORY OF LARGE HAIL. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS
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, May 4, 10:10 AM CDT, 1 hour 18 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 050400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1010 AM CDT TUE MAY 4 1999 ...SIGNIFICANT OUTBREAK OF SEVERE WEATHER POSSIBLE ACROSS NORTHEAST LOUISIANA...SOUTHEAST ARKANSAS...AND WESTERN MISSISSIPPI THIS AFTERNOON AND TONIGHT... A MODERATE RISK OF SEVERE THUNDERSTORMS EXISTS TODAY AND TONIGHT OVER THE DELTA REGIONS OF NORTHEAST LOUISIANA...SOUTHEAST ARKANSAS... AND WEST CENTRAL MISSISSIPPI. A SLIGHT RISK OF SEVERE THUNDERSTORMS EXISTS OVER MOST OF THE REMAINDER OF MISSISSIPPI. A STRONG DISTURBANCE IN MID AND UPPER LEVELS OF THE ATMOSPHERE WILL MOVE ACROSS THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY THIS AFTERNOON AND TONIGHT. AS IT DOES...INTENSE LOW PRESSURE AT THE SURFACE WILL MOVE INTO KANSAS. STRONG SOUTHERLY WINDS AHEAD OF THE LOW WILL TRANSPORT MOIST AND UNSTABLE AIR NORTH INTO THE REGION TODAY. STRONG TO SEVERE THUNDERSTORMS WERE ALREADY IN PROGRESS LATE THIS MORNING ACROSS CENTRAL MISSISSIPPI. THESE STORMS WILL MOVE NORTHEAST AND GRADUALLY WEAKEN INTO THE AFTERNOON HOURS. MORE THUNDERSTORMS WILL DEVELOP TO THE WEST OF THE AREA THIS AFTERNOON...AND MOVE INTO THE REGION LATE THIS AFTERNOON AND TONIGHT. DAMAGING WINDS...VERY LARGE HAIL...AND TORNADOES ARE POSSIBLE WITH THESE STORMS... PARTICULARLY IN THE MODERATE RISK AREA. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IS LIKELY THIS AFTERNOON AND TONIGHT. PEOPLE ACROSS THE AREA SHOULD KEEP UP TO DATE WITH THE LATEST WEATHER INFORMATION AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WATCHES OR WARNINGS. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT: HTTP://WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 9:33 AM CDT | Severe Thunderstorm Warning | JAN | Yazoo | 47 min |
| May 4, 9:38 AM CDT | Severe Thunderstorm Warning | JAN | Hinds, Rankin | 47 min |
| May 4, 9:53 AM CDT | Severe Thunderstorm Warning | JAN | Madison | 62 min |
| May 4, 10:22 AM CDT | Severe Thunderstorm Warning | JAN | Rankin | 33 min |
| May 4, 10:38 AM CDT | Severe Thunderstorm Warning | JAN | Attala | 62 min |
| May 4, 10:47 AM CDT | Severe Thunderstorm Warning | JAN | Yazoo | 33 min |
| May 4, 10:53 AM CDT | Severe Thunderstorm Warning | JAN | Madison | 32 min |
| May 4, 11:11 AM CDT | Severe Thunderstorm Warning | JAN | Leake | 49 min |
| May 4, 11:14 AM CDT | Severe Thunderstorm Warning | JAN | Neshoba | 51 min |
| May 4, 11:17 AM CDT | Severe Thunderstorm Warning | JAN | Rankin | 33 min |
| May 4, 11:19 AM CDT | Severe Thunderstorm Warning | JAN | Holmes | 51 min |
| May 4, 11:24 AM CDT | Severe Thunderstorm Warning | JAN | Scott | 51 min |
| May 4, 11:56 AM CDT | Severe Thunderstorm Warning | JAN | Leake, Neshoba | 49 min |
| May 4, 11:59 AM CDT | Severe Thunderstorm Warning | JAN | Winston | 21 min |
| May 4, 12:22 PM CDT | Severe Thunderstorm Warning | JAN | Carroll | 33 min |
| May 4, 12:57 PM CDT | Severe Thunderstorm Warning | JAN | Choctaw | 33 min |
| May 4, 2:35 PM CDT | Severe Thunderstorm Warning | JAN | Clay | 35 min |
| May 4, 3:05 PM CDT | Severe Thunderstorm Warning | JAN | Lowndes | 35 min |
| May 4, 4:31 PM CDT | Severe Thunderstorm Warning | JAN | Marion | 34 min |
| May 4, 5:32 PM CDT | Severe Thunderstorm Warning | JAN | Washington | 33 min |
| May 4, 6:05 PM CDT | Severe Thunderstorm Warning | JAN | Washington | 35 min |
| May 4, 6:38 PM CDT | Severe Thunderstorm Warning | JAN | Leflore | 47 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.