Alert archive / Maryland / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 221, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Sep 4, 2015, 2:36 PM EDT for Allegany County, Maryland; Mineral County, West Virginia. It was in force for 21 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
- Sep 4, 2015, 2:36 PM EDT (18:36 UTC)
- Expired
- Sep 4, 2015, 2:57 PM EDT
- In force
- 21 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
Counties Allegany County, MD, Mineral County, WV
The radar
The Sterling radar (KLWX), 130 km from the middle of the area, began a volume at 18:40 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.
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 6.6 hours before the alert went out and 147 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
- 36 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 1202 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 1:20 PM EDT | Special Marine Warning | LWX | 40 min | |
| Sep 4, 1:31 PM EDT | Special Marine Warning | LWX | 89 min | |
| Sep 4, 2:42 PM EDT | Severe Thunderstorm Warning | LWX | Fauquier, Prince William | 48 min |
| Sep 4, 2:46 PM EDT | Severe Thunderstorm Warning | LWX | Augusta | 14 min |
| Sep 4, 3:26 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Fauquier, Prince William | 26 min |
| Sep 4, 4:24 PM EDT | Special Marine Warning | LWX | 96 min | |
| Sep 4, 6:14 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham, City of Harrisonburg | 31 min |
| Sep 4, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | Mineral | 31 min |
| Sep 4, 5:37 PM EDT | Severe Thunderstorm Warning | LWX | Hampshire, Mineral | 23 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2015Severe Thunderstorm Warnings in West Virginia, 2015Every severe thunderstorm warning in 2015
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; radar from the NEXRAD Level II archive.