Alert archive / Maryland / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 221, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 21, 2014, 5:06 PM EDT for Harford County, Maryland. It was in force for 39 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
- Aug 21, 2014, 5:06 PM EDT (21:06 UTC)
- Expired
- Aug 21, 2014, 5:45 PM EDT
- In force
- 39 min
- Issued by
- NWS Baltimore/Washington
- Area
- Storm-based polygon
County Harford County, MD
The radar
The Dover AFB radar (KDOX), 108 km from the middle of the area, began a volume at 21:08 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.1 hours before the alert went out and 19 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
- 61 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 794 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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.
NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 21, 2:39 PM EDT, 2 hours 27 minutes earlier.
Area forecast discussion, Aug 21, 2:39 PM EDT, 2 hours 27 minutes before
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Special weather statement, Aug 21, 3:46 PM EDT, 1 hour 20 minutes before
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</html>The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 8:08 PM EDT | Flash Flood Warning | LWX | Rockingham | 3 hr |
| Aug 21, 5:24 AM EDT | Dense Fog Advisory | LWX | Clarke, Culpeper, Fauquier, Frederick, Greene, Madison and 12 more | 5 hr |
| Aug 21, 4:13 PM EDT | Severe Thunderstorm Warning | LWX | Arlington, Fairfax, Loudoun, City of Fairfax, City of Falls Church | 47 min |
| Aug 21, 4:41 PM EDT | Special Marine Warning | LWX | 94 min | |
| Aug 21, 5:08 PM EDT | Special Marine Warning | LWX | 97 min | |
| Aug 21, 6:03 PM EDT | Special Marine Warning | LWX | 87 min | |
| Aug 20, 8:51 PM EDT | Coastal Flood Advisory | LWX | Anne Arundel | 8 hr |
| Aug 21, 5:35 PM EDT | Severe Thunderstorm Warning | LWX | Harford | 40 min |
| Aug 21, 7:30 PM EDT | Severe Thunderstorm Warning | LWX | Baltimore, Carroll, Harford | 45 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2014Every severe thunderstorm warning in 2014
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.