Alert archive / Virginia / Special Weather Statements in 2012
Special Weather Statement, NWS Baltimore/Washington
NWS Baltimore/Washington issued this special weather statement at Oct 19, 2012, 12:49 AM EDT for 5 counties in Virginia; Montgomery County, Maryland. It was in force for 41 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
- Oct 19, 2012, 12:49 AM EDT (04:49 UTC)
- Expired
- Oct 19, 2012, 1:30 AM EDT
- In force
- 41 min
- Issued by
- NWS Baltimore/Washington
Counties Montgomery County, MD, Arlington County, VA, City of Fairfax, VA, City of Falls Church, VA, City of Manassas Park, VA, Fairfax County, VA
The radar
The Sterling radar (KLWX), 24 km from the middle of the area, began a volume at 04:52 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 00:00Z, 4.8 hours before the alert went out and 16 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
- 203 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 208 m²/s²
- 0-3 km storm-relative helicity
- 334 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 Oct 19, 12:09 AM EDT, 40 minutes earlier.
Area forecast discussion, Oct 19, 12:09 AM EDT, 40 minutes before
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</html>Hazardous weather outlook, Oct 18, 10:41 PM EDT, 2 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1041 PM EDT THU OCT 18 2012 ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057- 191015- CHESAPEAKE BAY NORTH OF POOLES ISLAND MD- CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD- CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD- CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD- CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA- TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD- TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD- TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA- PATAPSCO RIVER INCLUDING BALTIMORE HARBOR- CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY- CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER- PATUXENT RIVER TO BROOMES ISLAND MD- TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND-DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD- SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS- CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX- ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA- KING GEORGE- 1041 PM EDT THU OCT 18 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF COLUMBIA. .DAY ONE...TONIGHT A COASTAL FLOOD ADVISORY IS IN EFFECT FOR THE SHORES OF THE UPPER TIDAL POTOMAC RIVER UNTIL 2 AM EDT. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE WATERS THROUGH THIS EVENING. A SMALL CRAFT ADVISORY REMAINS IN EFFECT THROUGH TONIGHT FOR THE MARYLAND CHESAPEAKE BAY AND THE TIDAL POTOMAC RIVER FROM INDIAN HEAD TO SMITH POINT. SHOWERS AND THUNDERSTORMS WILL IMPACT THE REGION LATE THIS EVENING. SOME THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A SMALL CRAFT ADVISORY IS IN EFFECT FRIDAY AFTERNOON FOR THE WATERS...THEN CONTINUES FOR SOUTHERN MARYLAND WATERS FRIDAY EVENING. MINOR COASTAL FLOODING MAY OCCUR NEAR TIMES OF HIGH TIDE FRIDAY THROUGH FRIDAY EVENING ALONG THE SHORE OF THE TIDAL POTOMAC RIVER AND THE WESTERN SHORE OF THE MARYLAND CHESAPEAKE BAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504- WVZ050>053-055-501>506-191015- WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD- EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA- ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON- ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER- NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND- EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY- WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL- WESTERN PENDLETON-EASTERN PENDLETON- 1041 PM EDT THU OCT 18 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA... NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND WITH THE EXCEPTION OF GARRETT COUNTY. .DAY ONE...TONIGHT SHOWERS AND THUNDERSTORMS WILL IMPACT AREAS EAST OF THE BLUE RIDGE LATE THIS EVENING. SOME THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
In the hours before
Special weather statement, Oct 18, 11:19 PM EDT, 1 hour 30 minutes before
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</html>Special weather statement, Oct 19, 12:49 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 |
|---|---|---|---|---|
| Oct 18, 8:45 PM EDT | Special Weather Statement | LWX | Rockingham | 30 min |
| Oct 18, 8:53 PM EDT | Severe Thunderstorm Warning | LWX | Page, Rockingham, Shenandoah, Warren | 52 min |
| Oct 18, 9:17 PM EDT | Special Weather Statement | LWX | Frederick, City of Winchester | 28 min |
| Oct 18, 9:21 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Frederick, Shenandoah, Warren, City of Winchester | 39 min |
| Oct 18, 9:26 PM EDT | Special Weather Statement | LWX | Madison, Rappahannock | 34 min |
| Oct 18, 9:40 PM EDT | Special Weather Statement | LWX | Rockingham, Shenandoah | 35 min |
| Oct 18, 9:41 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun, Page, Rappahannock, Shenandoah and 1 more | 26 min |
| Oct 18, 10:08 PM EDT | Special Weather Statement | LWX | Fauquier, Loudoun | 37 min |
| Oct 18, 10:09 PM EDT | Special Weather Statement | LWX | Albemarle, City of Charlottesville | 36 min |
| Oct 18, 10:25 PM EDT | Special Weather Statement | LWX | Orange | 35 min |
| Oct 18, 10:27 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 37 min |
| Oct 18, 10:43 PM EDT | Special Weather Statement | LWX | Loudoun | 32 min |
| Oct 18, 10:49 PM EDT | Special Weather Statement | LWX | Orange | 26 min |
| Oct 18, 11:10 PM EDT | Special Weather Statement | LWX | Orange | 35 min |
| Oct 18, 11:16 PM EDT | Severe Thunderstorm Warning | LWX | Culpeper, Madison, Orange | 29 min |
| Oct 18, 11:19 PM EDT | Special Weather Statement | LWX | Fauquier | 26 min |
| Oct 18, 11:38 PM EDT | Special Weather Statement | LWX | Albemarle, City of Charlottesville | 37 min |
| Oct 18, 11:44 PM EDT | Special Weather Statement | LWX | Culpeper | 31 min |
| Oct 19, 12:04 AM EDT | Small Craft Advisory | LWX | 3 hr | |
| Oct 19, 12:12 AM EDT | Special Weather Statement | LWX | Prince William, City of Manassas | 33 min |
| Oct 19, 12:56 AM EDT | Special Marine Warning | LWX | 47 min | |
| Oct 19, 3:12 AM EDT | Special Weather Statement | LWX | Spotsylvania | 33 min |
| Oct 19, 8:14 AM EDT | Special Marine Warning | LWX | 26 min | |
| Oct 19, 2:06 PM EDT | Small Craft Advisory | LWX | 11 hr | |
| Oct 19, 3:29 PM EDT | Coastal Flood Advisory | LWX | Arlington, City of Alexandria, City of Falls Church | 11 hr |
| Oct 19, 5:13 PM EDT | Special Weather Statement | LWX | Arlington, Fairfax, City of Alexandria, City of Falls Church | 32 min |
| Oct 19, 5:14 PM EDT | Special Marine Warning | LWX | 91 min | |
| Oct 19, 5:48 PM EDT | Special Weather Statement | LWX | Arlington, Fairfax, City of Alexandria, City of Falls Church | 57 min |
| Oct 19, 5:53 PM EDT | Special Marine Warning | LWX | 97 min | |
| Oct 19, 6:31 PM EDT | Special Marine Warning | LWX | 89 min | |
| Oct 19, 6:50 PM EDT | Special Weather Statement | LWX | Arlington, City of Alexandria | 55 min |
| Oct 19, 7:59 PM EDT | Special Marine Warning | LWX | 91 min | |
| Oct 18, 9:23 PM EDT | Special Weather Statement | LWX | Frederick | 37 min |
| Oct 18, 9:51 PM EDT | Special Weather Statement | LWX | Frederick | 24 min |
| Oct 18, 9:52 PM EDT | Special Weather Statement | LWX | Washington | 38 min |
| Oct 18, 9:55 PM EDT | Severe Thunderstorm Warning | LWX | Carroll, Frederick, Washington | 30 min |
| Oct 18, 10:30 PM EDT | Special Weather Statement | LWX | Carroll | 30 min |
| Oct 18, 10:53 PM EDT | Special Weather Statement | LWX | Carroll | 37 min |
| Oct 18, 11:20 PM EDT | Special Weather Statement | LWX | Howard, Montgomery | 25 min |
| Oct 19, 1:29 AM EDT | Special Weather Statement | LWX | Baltimore, Howard, City of Baltimore | 46 min |
| Oct 19, 2:11 AM EDT | Special Weather Statement | LWX | Harford | 34 min |
| Oct 19, 6:27 PM EDT | Tornado Warning | LWX | Baltimore | 33 min |
| Oct 19, 6:52 PM EDT | Tornado Warning | LWX | Baltimore, Harford | 38 min |
| Oct 18, 9:31 PM EDT | Special Weather Statement | LWX | Morgan | 29 min |
Nearby
Special Weather Statements in Virginia, 2012Special Weather Statements in Maryland, 2012Every special weather statement in 2012
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.