Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 3, NWS Jackson, MS
NWS Jackson, MS issued this severe thunderstorm warning at Jan 2, 1999, 6:25 AM CST for Simpson County, Mississippi. It was in force for 35 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 2, 1999, 6:25 AM CST (12:25 UTC)
- Expired
- Jan 2, 1999, 7:00 AM CST
- In force
- 35 min
- Issued by
- NWS Jackson, MS
- Area
- Whole counties
County Simpson County, MS
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 2, 6:30 AM CST | Thunderstorm Wind | Magee, MS | Numerous trees were blown down. |
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, 0.4 hours before the alert went out and 48 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
- 218 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 396 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
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 2, 4:50 AM CST, 1 hour 35 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 021600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSON MS 450 AM CST SAT JAN 2 1999 ...THREAT OF SEVERE WEATHER AND FLOODING TODAY TO BE FOLLOWED BY MUCH COLDER TEMPERATURES... A LOW PRESSURE SYSTEM WAS DEVELOPING OVER EAST TEXAS EARLY THIS MORNING. THIS LOW IS EXPECTED TO INTENSIFY TODAY AS IT MOVES NORTHEAST INTO THE LOWER OHIO VALLEY. A STRONG COLD FRONT ASSOCIATED WITH THE LOW WILL SWEEP ACROSS THE AREA DURING THE DAY TODAY. A LARGE AREA OF RAIN AND THUNDERSTORMS WAS OVER NORTHEAST LOUISIANA... SOUTHEAST ARKANSAS...AND WESTERN MISSISSIPPI EARLY THIS MORNING. THIS AREA OF PRECIPITATION WILL OVERSPREAD THE ENTIRE AREA THIS MORNING...WITH RAINFALL THEN DIMINISHING FROM WEST TO EAST BY THE AFTERNOON HOURS. BEFORE DIMINISHING...RAINFALL COULD BE LOCALLY HEAVY ACROSS THE REGION...AND A FLOOD WATCH IS IN EFFECT FOR THIS MORNING ACROSS WESTERN MISSISSIPPI... NORTHEAST LOUISIANA...AND SOUTHEAST ARKANSAS...AND ALL DAY OVER EASTERN MISSISSIPPI. IN ADDITION TO THE THREAT OF FLOODING...SEVERE THUNDERSTORMS ARE ALSO POSSIBLE...MAINLY OVER SOUTHERN MISSISSIPPI. DAMAGING WINDS ARE THE MAIN THREAT FROM ANY SEVERE STORMS THAT DEVELOP...ALONG WITH A THREAT OF TORNADOES. ONCE THE FRONT MOVES THROUGH...MUCH COLDER AIR WILL MOVE INTO THE REGION. AFTER RELATIVELY MILD EARLY MORNING READINGS IN THE 50S AND 60S... TEMPERATURES WILL FALL INTO THE 30S AND 40S BY THIS EVENING. GUSTY NORTHWEST WINDS BEHIND THE FRONT COULD PUSH WIND CHILL READINGS INTO THE SINGLE DIGITS AND TEENS OVER MUCH OF THE REGION BY TONIGHT. AFTER LOWS TONIGHT IN THE 20S...TEMPERATURES WILL ONLY RECOVER INTO THE 30S ON SUNDAY. TEMPERATURES WILL THEN FALL TO VERY COLD OVERNIGHT LOWS RANGING FROM THE MID TEENS TO MID 20S ON SUNDAY NIGHT. PEOPLE ACROSS THE REGION SHOULD BE PREPARED FOR THE POSSIBILITY OF SEVERE WEATHER TODAY...AND THEN FOR THE VERY COLD TEMPERATURES WHICH WILL MOVE IN LATER TODAY AND TONIGHT. TUNE IN TO NOAA WEATHER RADIO...LOCAL RADIO OR TV...OR YOUR CABLE TV OUTLET FOR THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Jackson, MS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 5:01 AM CST | Severe Thunderstorm Warning | JAN | Franklin | 49 min |
| Jan 2, 5:35 AM CST | Severe Thunderstorm Warning | JAN | Lincoln | 50 min |
| Jan 2, 6:35 AM CST | Severe Thunderstorm Warning | JAN | Rankin, Scott, Smith | 45 min |
| Jan 2, 3:44 AM CST | Flash Flood Warning | JAN | Madison, Tensas | 76 min |
| Jan 2, 4:02 AM CST | Tornado Warning | JAN | Concordia | 33 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.