Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 101, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Feb 27, 1999, 4:25 PM CST for Calhoun County, Pontotoc County, Mississippi. It was in force for 45 min. 2 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
- Feb 27, 1999, 4:25 PM CST (22:25 UTC)
- Expired
- Feb 27, 1999, 5:10 PM CST
- In force
- 45 min
- Issued by
- NWS Memphis, TN
- Area
- Whole counties
Counties Calhoun County, MS, Pontotoc County, MS
The radar
The Columbus AFB radar (KGWX), 82 km from the middle of the area, began a volume at 22:28 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, 4:25 PM CST | Thunderstorm Wind | Pontotoc, MS | Several power lines were knocked down. |
| Feb 27, 4:40 PM CST | Thunderstorm Wind | Calhoun City, MS | A few 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 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, 3:00 PM CST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 10.4 hours before the alert went out and 213 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.
The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 3:29 PM CST | Severe Thunderstorm Warning | MEG | Tallahatchie | 46 min |
| Feb 27, 4:44 PM CST | Severe Thunderstorm Warning | MEG | Lee | 46 min |
| Feb 27, 4:49 PM CST | Severe Thunderstorm Warning | MEG | Chickasaw | 51 min |
| Feb 27, 5:12 PM CST | Severe Thunderstorm Warning | MEG | Itawamba, Monroe | 48 min |
| Feb 27, 2:36 PM CST | Severe Thunderstorm Warning | MEG | Phillips | 34 min |
| Feb 27, 4:16 PM CST | Severe Thunderstorm Warning | MEG | Poinsett | 29 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; radar from the NEXRAD Level II archive.