Alert archive / Maryland / Special Weather Statements in 2011
Special Weather Statement, NWS Baltimore/Washington
NWS Baltimore/Washington issued this special weather statement at Sep 3, 2011, 9:21 AM EDT for 4 counties in Maryland. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 3, 2011, 9:21 AM EDT (13:21 UTC)
- Expired
- Sep 3, 2011, 9:45 AM EDT
- In force
- 24 min
- Issued by
- NWS Baltimore/Washington
Counties Carroll County, MD, Frederick County, MD, Howard County, MD, Montgomery County, MD
The radar
The Sterling radar (KLWX), 66 km from the middle of the area, began a volume at 13:21 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 1.4 hours before the alert went out and 63 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
- 115 J/kg
- Mixed-layer CIN
- -316 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Sep 3, 3:47 AM EDT, 5 hours 34 minutes earlier.
Area forecast discussion, Sep 3, 3:47 AM EDT, 5 hours 34 minutes before
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</html>Hazardous weather outlook, Sep 3, 3:55 AM EDT, 5 hours 26 minutes before
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</html>In the hours before
Special weather statement, Sep 3, 8:43 AM EDT, 38 minutes before
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</html>Special weather statement, Sep 3, 9:21 AM EDT, 0 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 |
|---|---|---|---|---|
| Sep 3, 9:44 AM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun | 46 min |
| Sep 3, 9:51 AM EDT | Special Weather Statement | LWX | Loudoun | 24 min |
| Sep 3, 10:25 AM EDT | Special Weather Statement | LWX | Fauquier | 35 min |
| Sep 3, 11:06 AM EDT | Special Weather Statement | LWX | Culpeper, Fauquier | 24 min |
| Sep 3, 11:41 AM EDT | Special Weather Statement | LWX | Culpeper, Orange, Spotsylvania | 34 min |
| Sep 3, 1:32 PM EDT | Special Weather Statement | LWX | City of Waynesboro | 28 min |
| Sep 3, 1:49 PM EDT | Coastal Flood Advisory | LWX | Arlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more | 14 hr |
| Sep 3, 2:04 PM EDT | Special Weather Statement | LWX | Augusta | 56 min |
| Sep 3, 2:19 PM EDT | Special Weather Statement | LWX | Nelson | 56 min |
| Sep 3, 2:24 PM EDT | Special Weather Statement | LWX | Highland | 66 min |
| Sep 3, 2:33 PM EDT | Severe Thunderstorm Warning | LWX | Highland | 24 min |
| Sep 3, 3:17 PM EDT | Severe Thunderstorm Warning | LWX | Rockingham | 24 min |
| Sep 3, 4:59 PM EDT | Small Craft Advisory | LWX | 3 days | |
| Sep 3, 8:43 AM EDT | Special Weather Statement | LWX | Carroll | 32 min |
| Sep 3, 10:29 AM EDT | Special Weather Statement | LWX | Montgomery | 31 min |
| Sep 3, 10:45 AM EDT | Special Weather Statement | LWX | City of Baltimore | 30 min |
| Sep 3, 1:43 PM EDT | Special Weather Statement | LWX | Pendleton | 32 min |
| Sep 3, 2:27 PM EDT | Special Weather Statement | LWX | Pendleton | 63 min |
| Sep 3, 2:45 PM EDT | Severe Thunderstorm Warning | LWX | Pendleton | 45 min |
Nearby
Special Weather Statements in Maryland, 2011Every special weather statement 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.