Alert archive / West Virginia / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 18, NWS Charleston, WV
NWS Charleston, WV issued this severe thunderstorm warning at Apr 23, 1999, 1:18 PM EDT for Tyler County, West Virginia; Washington County, Ohio. It was in force for 47 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
- Apr 23, 1999, 1:18 PM EDT (17:18 UTC)
- Expired
- Apr 23, 1999, 2:05 PM EDT
- In force
- 47 min
- Issued by
- NWS Charleston, WV
- Area
- Whole counties
Counties Washington County, OH, Tyler County, WV
The radar
The Charleston,WV radar (KRLX), 136 km from the middle of the area, began a volume at 17:17 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 |
|---|---|---|---|
| Apr 23, 1:45 PM EDT | Hail 1 | Dart, OH | |
| Apr 23, 2:05 PM EDT | Hail 1.75 | Shirley, WV |
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
Pittsburgh, PA (KPIT), launched 12:00Z, 5.3 hours before the alert went out and 141 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
- 1 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 569 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 188 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 Charleston, WV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 1:46 PM EDT | Severe Thunderstorm Warning | RLX | Doddridge | 49 min |
| Apr 23, 2:03 PM EDT | Severe Thunderstorm Warning | RLX | Harrison | 47 min |
| Apr 23, 2:19 PM EDT | Tornado Warning | RLX | Mingo | 51 min |
| Apr 23, 2:23 PM EDT | Severe Thunderstorm Warning | RLX | Barbour | 47 min |
| Apr 23, 2:52 PM EDT | Tornado Warning | RLX | Wyoming | 48 min |
| Apr 23, 2:56 PM EDT | Severe Thunderstorm Warning | RLX | Randolph | 34 min |
| Apr 23, 3:05 PM EDT | Severe Thunderstorm Warning | RLX | McDowell | 50 min |
| Apr 23, 3:32 PM EDT | Severe Thunderstorm Warning | RLX | Upshur | 33 min |
| Apr 23, 3:41 PM EDT | Severe Thunderstorm Warning | RLX | Randolph | 34 min |
| Apr 23, 4:16 PM EDT | Severe Thunderstorm Warning | RLX | Pocahontas | 34 min |
| Apr 23, 5:37 PM EDT | Severe Thunderstorm Warning | RLX | Barbour | 38 min |
| Apr 23, 6:34 PM EDT | Severe Thunderstorm Warning | RLX | Fayette | 31 min |
| Apr 23, 1:30 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan | 50 min |
Nearby
Severe Thunderstorm Warnings in West Virginia, 1999Severe Thunderstorm Warnings in Ohio, 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.