Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 9, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jan 8, 1999, 5:24 PM CST for Issaquena County, Mississippi. It was in force for 36 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 8, 1999, 5:24 PM CST (23:24 UTC)
- Expired
- Jan 8, 1999, 6:00 PM CST
- In force
- 36 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Issaquena 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 |
|---|---|---|---|
| Jan 8, 3:00 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 11.4 hours before the alert went out and 260 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, 2:40 PM CST, 2 hours 44 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, 5:37 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, 3:22 PM CST | Severe Thunderstorm Warning | JAN | West Carroll | 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 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.