Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 6, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jan 8, 1999, 3:22 PM CST for West Carroll Parish, Louisiana. It was in force for 33 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
- Jan 8, 1999, 3:22 PM CST (21:22 UTC)
- Expired
- Jan 8, 1999, 3:55 PM CST
- In force
- 33 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County West Carroll Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 8, 3:38 PM CST | Tornado F0 | Oak Grove, LA | A trained spotter viewed this short-track tornado. Minor structural damage was done to a couple of dwellings. |
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 |
|---|---|---|---|
| Jan 8, 3:00 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.4 hours before the alert went out and 217 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
- 1083 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.3
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, Jan 8, 9:50 AM CST, 5 hours 32 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
090400-
AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
950 AM CST FRI JAN 8 1999
...A FEW STORMS MAY BECOME SEVERE CENTRAL AND SOUTH PORTIONS TONIGHT...
SCATTERED THUNDERSTORMS OVER MAINLY WEST AND NORTH MISSISSIPPI TODAY
WILL GRADUALLY INCREASE BY EARLY TONIGHT. A DEVELOPING LOW PRESSURE
SYSTEM WILL MOVE FROM THE ARKLATEX REGION TODAY INTO TENNESSEE BY LATE
THIS EVENING. THUNDERSTORMS WILL ORGANIZE ALONG THE TRAILING STRONG COLD
FRONT THAT IS FORECAST TO SWEEP EASTWARD DURING THE NIGHT BRINGING THE
THREAT FOR DAMAGING WINDS MAINLY TO SOUTHERN MISSISSIPPI.
ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY
MANAGEMENT/CIVIL DEFENSE PERSONNEL MAY BECOME NECESSARY FOR SEVERE
WEATHER LATE TODAY OR TONIGHT. KEEP ADVISED OF LATER STATEMENTS.
FOR MORE INFORMATION...PLEASE VISIT OUR INTERNET WEB SITE AT:
HTTP://WWW.JANNWS.STATE.MS.US /IN LOWER CASE LETTERS/Special weather statement, Jan 8, 2:40 PM CST, 42 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 090400- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 240 PM CST FRI JAN 8 1999 A TORNADO WATCH IS IN EFFECT FOR MOST OF NORTHWEST AND WEST CENTRAL MISSISSIPPI TILL 800 PM TONIGHT. THIS TORNADO WATCH AREA MAY BE EXTENDED FARTHER TO THE EAST IN MISSISSIPPI LATER TONIGHT. SCATTERED THUNDERSTORMS OVER MAINLY WEST AND NORTH MISSISSIPPI TODAY WILL GRADUALLY INCREASE AND MOVE FARTHER EASTWARD TONIGHT. A DEVELOPING LOW PRESSURE SYSTEM WILL MOVE FROM THE ARKLATEX REGION TODAY AND WILL WOVE INTO TENNESSEE BY LATE THIS EVENING. THUNDERSTORMS WILL ORGANIZE ALONG THE TRAILING STRONG COLD FRONT THAT IS FORECAST TO SWEEP EASTWARD DURING THE NIGHT BRINGING THE THREAT FOR DAMAGING WINDS AND LARGE HAIL THROUGH MOST OF THE STATE. ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS AND EMERGENCY MANAGEMENT/CIVIL DEFENSE PERSONNEL WILL BE NECESSARY IN COUNTIES AND PARISHES COVERED BY THE CURRENT TORNADO WATCH AND MAY BECOME NECESSARY IN ADDITIONAL COUTIES IN MISSISSIPPI LATER TONIGHT.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 8, 4:03 PM CST | Tornado Warning | JAN | Issaquena | 32 min |
| Jan 8, 4:08 PM CST | Severe Thunderstorm Warning | JAN | Washington | 37 min |
| Jan 8, 4:23 PM CST | Tornado Warning | JAN | Sharkey | 32 min |
| Jan 8, 4:44 PM CST | Severe Thunderstorm Warning | JAN | Washington | 36 min |
| Jan 8, 4:51 PM CST | Tornado Warning | JAN | Sharkey | 34 min |
| Jan 8, 5:07 PM CST | Tornado Warning | JAN | Humphreys | 48 min |
| Jan 8, 5:24 PM CST | Severe Thunderstorm Warning | JAN | Issaquena | 36 min |
| Jan 8, 5:37 PM CST | Tornado Warning | JAN | Holmes | 48 min |
| Jan 8, 5:51 PM CST | Severe Thunderstorm Warning | JAN | Sharkey | 34 min |
| Jan 8, 3:12 PM CST | Severe Thunderstorm Warning | JAN | Morehouse | 33 min |
| Jan 8, 3:26 PM CST | Tornado Warning | JAN | West Carroll | 34 min |
| Jan 8, 3:43 PM CST | Tornado Warning | JAN | Morehouse | 47 min |
| Jan 8, 3:47 PM CST | Tornado Warning | JAN | East Carroll | 33 min |
| Jan 8, 4:26 PM CST | Tornado Warning | JAN | Richland, West Carroll | 34 min |
| Jan 8, 4:58 PM CST | Tornado Warning | JAN | East Carroll | 32 min |
| Jan 8, 5:58 PM CST | Tornado Warning | JAN | Morehouse | 47 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.