Alert archive / Maryland / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 441, NWS Baltimore/Washington
NWS Baltimore/Washington issued this severe thunderstorm warning at Oct 14, 2011, 11:17 AM EDT for Harford County, Maryland. It was in force for 15 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
- Oct 14, 2011, 11:17 AM EDT (15:17 UTC)
- Expired
- Oct 14, 2011, 11:32 AM EDT
- In force
- 15 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 15:18 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, 3.3 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
- 262 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 748 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Oct 14, 9:46 AM EDT, 1 hour 31 minutes earlier.
Area forecast discussion, Oct 14, 9:46 AM EDT, 1 hour 31 minutes before
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Special weather statement, Oct 14, 11:11 AM EDT, 6 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 |
|---|---|---|---|---|
| Oct 13, 8:53 PM EDT | Flash Flood Warning | LWX | Fairfax | 2 hr |
| Oct 13, 8:59 PM EDT | Flash Flood Warning | LWX | Culpeper, Fauquier, Madison, Rappahannock | 2 hr |
| Oct 13, 11:04 PM EDT | Areal Flood Warning | LWX | Fairfax, City of Fairfax | 117 min |
| Oct 14, 1:44 AM EDT | Small Craft Advisory | LWX | 54 hr | |
| Oct 14, 4:37 AM EDT | Small Craft Advisory | LWX | 51 hr | |
| Oct 14, 12:04 PM EDT | Coastal Flood Advisory | LWX | Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church | 16 hr |
| Oct 14, 1:34 PM EDT | Special Marine Warning | LWX | 69 min | |
| Oct 14, 1:39 PM EDT | Special Marine Warning | LWX | 64 min | |
| Oct 14, 6:45 PM EDT | Small Craft Advisory | LWX | 25 hr | |
| Oct 14, 6:48 PM EDT | Wind Advisory | LWX | Highland, Rockingham, Shenandoah, City of Harrisonburg, City of Staunton, City of Waynesboro | 23 hr |
| Oct 13, 11:23 PM EDT | River Flood Warning | LWX | Montgomery | 4 hr |
| Oct 14, 11:11 AM EDT | Special Weather Statement | LWX | Harford | 34 min |
| Oct 14, 1:41 PM EDT | Special Weather Statement | LWX | Calvert | 34 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2011Every severe thunderstorm warning in 2011
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.