Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 137, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Feb 27, 1999, 3:46 PM CST for Catahoula Parish, Louisiana. It was in force for 34 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
- Feb 27, 1999, 3:46 PM CST (21:46 UTC)
- Expired
- Feb 27, 1999, 4:20 PM CST
- In force
- 34 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Catahoula Parish, LA
The radar
The Ft Polk radar (KPOE), 121 km from the middle of the area, began a volume at 21:50 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 27, 4:15 PM CST | Thunderstorm Wind | Countywide, LA | Several trees were blown down throughout the Parish. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 27, 1:15 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 9.8 hours before the alert went out and 182 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
- 17 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 524 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 198 m²/s²
- 0-3 km storm-relative helicity
- 229 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, Feb 27, 10:00 AM CST, 5 hours 46 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 280400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1000 AM CST SAT FEB 27 1999 ...RISK OF SEVERE THUNDERSTORMS ACROSS THE REGION LATER THIS AFTERNOON AND EARLY TONIGHT... A LOW PRESSURE SYSTEM WAS OVER SOUTHWEST MISSOURI THIS MORNING...WITH A COLD FRONT EXTENDING FROM THE LOW ACROSS NORTHWEST ARKANSAS...SOUTHEAST OKLAHOMA...AND EASTERN TEXAS. SOUTHERLY WINDS AHEAD OF THIS SYSTEM WERE BRINGING MOIST AND UNSTABLE AIR INTO THE LOWER MISSISSIPPI VALLEY REGION. AS THE LOW MOVES NORTHEAST TODAY...IT WILL SWEEP THE COLD FRONT EAST INTO THE LOWER MISSISSIPPI VALLEY...WITH THE FRONT MOVING ACROSS THE REGION LATER THIS AFTERNOON AND EARLY TONIGHT. SCATTERED THUNDERSTORMS WILL DEVELOP AHEAD OF THE SYSTEM THIS AFTERNOON...WITH THE ACTIVITY LIKELY TO FORM INTO A LINE OF STORMS WHICH WILL ACCOMPANY THE FRONT ACROSS THE REGION. SOME OF THESE STORMS MAY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS. ALTHOUGH THE ENTIRE REGION WILL SEE A RISK OF SEVERE WEATHER LATER TODAY AND EARLY TONIGHT...THE GREATEST THREAT IS OVER THE DELTA COUNTIES OF NORTHWEST MISSISSIPPI...SOUTHEAST ARKANASAS... AND NORTHEAST LOUISIANA. ACTIVATION OF STORM SPOTTERS...EMERGENCY MANAGEMENT PERSONNEL...AND HAM RADIO OPERATORS MAY BE REQUIRED THIS AFTERNOON AND TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEBSITE AT... HTTP://WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/
Special weather statement, Feb 27, 10:00 AM CST, 5 hours 46 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 280400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 1000 AM CST SAT FEB 27 1999 ...RISK OF SEVERE THUNDERSTORMS ACROSS THE REGION LATER THIS AFTERNOON AND EARLY TONIGHT... A LOW PRESSURE SYSTEM WAS OVER SOUTHWEST MISSOURI THIS MORNING...WITH A COLD FRONT EXTENDING FROM THE LOW ACROSS NORTHWEST ARKANSAS...SOUTHEAST OKLAHOMA...AND EASTERN TEXAS. SOUTHERLY WINDS AHEAD OF THIS SYSTEM WERE BRINGING MOIST AND UNSTABLE AIR INTO THE LOWER MISSISSIPPI VALLEY REGION. AS THE LOW MOVES NORTHEAST TODAY...IT WILL SWEEP THE COLD FRONT EAST INTO THE LOWER MISSISSIPPI VALLEY...WITH THE FRONT MOVING ACROSS THE REGION LATER THIS AFTERNOON AND EARLY TONIGHT. SCATTERED THUNDERSTORMS WILL DEVELOP AHEAD OF THE SYSTEM THIS AFTERNOON...WITH THE ACTIVITY LIKELY TO FORM INTO A LINE OF STORMS WHICH WILL ACCOMPANY THE FRONT ACROSS THE REGION. SOME OF THESE STORMS MAY BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS. ALTHOUGH THE ENTIRE REGION WILL SEE A RISK OF SEVERE WEATHER LATER TODAY AND EARLY TONIGHT...THE GREATEST THREAT IS OVER THE DELTA COUNTIES OF NORTHWEST MISSISSIPPI...SOUTHEAST ARKANASAS... AND NORTHEAST LOUISIANA. ACTIVATION OF STORM SPOTTERS...EMERGENCY MANAGEMENT PERSONNEL...AND HAM RADIO OPERATORS MAY BE REQUIRED THIS AFTERNOON AND TONIGHT. FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEBSITE 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 |
|---|---|---|---|---|
| Feb 27, 1:52 PM CST | Severe Thunderstorm Warning | JAN | Franklin | 48 min |
| Feb 27, 2:06 PM CST | Severe Thunderstorm Warning | JAN | Jefferson | 34 min |
| Feb 27, 2:59 PM CST | Severe Thunderstorm Warning | JAN | Lincoln | 36 min |
| Feb 27, 3:06 PM CST | Tornado Warning | JAN | Lincoln | 34 min |
| Feb 27, 3:11 PM CST | Severe Thunderstorm Warning | JAN | Washington | 49 min |
| Feb 27, 3:14 PM CST | Tornado Warning | JAN | Lawrence | 36 min |
| Feb 27, 3:22 PM CST | Severe Thunderstorm Warning | JAN | Leflore, Sunflower | 48 min |
| Feb 27, 3:29 PM CST | Severe Thunderstorm Warning | JAN | Issaquena, Sharkey | 36 min |
| Feb 27, 3:36 PM CST | Tornado Warning | JAN | Jefferson Davis, Simpson | 49 min |
| Feb 27, 3:44 PM CST | Severe Thunderstorm Warning | JAN | Grenada | 51 min |
| Feb 27, 3:57 PM CST | Severe Thunderstorm Warning | JAN | Warren | 48 min |
| Feb 27, 3:59 PM CST | Severe Thunderstorm Warning | JAN | Carroll | 51 min |
| Feb 27, 4:03 PM CST | Severe Thunderstorm Warning | JAN | Holmes, Yazoo | 47 min |
| Feb 27, 4:15 PM CST | Severe Thunderstorm Warning | JAN | Montgomery, Webster | 50 min |
| Feb 27, 4:18 PM CST | Severe Thunderstorm Warning | JAN | Adams, Claiborne, Jefferson | 47 min |
| Feb 27, 4:21 PM CST | Severe Thunderstorm Warning | JAN | Hinds, Madison | 49 min |
| Feb 27, 4:26 PM CST | Severe Thunderstorm Warning | JAN | Attala | 49 min |
| Feb 27, 4:38 PM CST | Severe Thunderstorm Warning | JAN | Franklin | 47 min |
| Feb 27, 4:44 PM CST | Severe Thunderstorm Warning | JAN | Leake | 46 min |
| Feb 27, 4:44 PM CST | Severe Thunderstorm Warning | JAN | Rankin | 46 min |
| Feb 27, 4:54 PM CST | Severe Thunderstorm Warning | JAN | Copiah | 46 min |
| Feb 27, 5:06 PM CST | Severe Thunderstorm Warning | JAN | Lincoln | 49 min |
| Feb 27, 5:08 PM CST | Severe Thunderstorm Warning | JAN | Choctaw, Oktibbeha, Winston | 47 min |
| Feb 27, 5:10 PM CST | Severe Thunderstorm Warning | JAN | Clay, Lowndes | 50 min |
| Feb 27, 5:12 PM CST | Tornado Warning | JAN | Franklin | 33 min |
| Feb 27, 5:16 PM CST | Severe Thunderstorm Warning | JAN | Neshoba | 49 min |
| Feb 27, 5:19 PM CST | Severe Thunderstorm Warning | JAN | Scott | 51 min |
| Feb 27, 5:24 PM CST | Tornado Warning | JAN | Copiah | 36 min |
| Feb 27, 5:30 PM CST | Severe Thunderstorm Warning | JAN | Simpson | 50 min |
| Feb 27, 5:32 PM CST | Severe Thunderstorm Warning | JAN | Rankin | 33 min |
| Feb 27, 5:36 PM CST | Severe Thunderstorm Warning | JAN | Lawrence | 49 min |
| Feb 27, 5:40 PM CST | Severe Thunderstorm Warning | JAN | Kemper | 50 min |
| Feb 27, 5:45 PM CST | Tornado Warning | JAN | Jefferson Davis, Simpson | 50 min |
| Feb 27, 5:49 PM CST | Tornado Warning | JAN | Lawrence | 36 min |
| Feb 27, 5:53 PM CST | Severe Thunderstorm Warning | JAN | Noxubee | 32 min |
| Feb 27, 5:56 PM CST | Severe Thunderstorm Warning | JAN | Marion | 49 min |
| Feb 27, 5:59 PM CST | Tornado Warning | JAN | Covington | 51 min |
| Feb 27, 2:53 PM CST | Severe Thunderstorm Warning | JAN | East Carroll, West Carroll | 32 min |
| Feb 27, 3:02 PM CST | Severe Thunderstorm Warning | JAN | Richland | 33 min |
| Feb 27, 4:08 PM CST | Severe Thunderstorm Warning | JAN | Concordia | 52 min |
| Feb 27, 2:20 PM CST | Severe Thunderstorm Warning | JAN | Ashley | 50 min |
| Feb 27, 2:46 PM CST | Severe Thunderstorm Warning | JAN | Chicot | 49 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 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; radar from the NEXRAD Level II archive.