Alert archive / Virginia / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 175, NWS Wakefield, VA
NWS Wakefield, VA issued this severe thunderstorm warning at Jul 20, 2011, 2:58 PM EDT for City of Chesapeake, Virginia; Currituck County, North Carolina. It was in force for 30 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
- Jul 20, 2011, 2:58 PM EDT (18:58 UTC)
- Expired
- Jul 20, 2011, 3:28 PM EDT
- In force
- 30 min
- Issued by
- NWS Wakefield, VA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Currituck County, NC, City of Chesapeake, VA
The radar
The Norfolk radar (KAKQ), 94 km from the middle of the area, began a volume at 18:59 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
Newport, NC (KMHX), launched 12:00Z, 7.0 hours before the alert went out and 206 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
- 911 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 967 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 88 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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 11:29 AM EDT, 3 hours 29 minutes earlier.
Area forecast discussion, Jul 20, 11:29 AM EDT, 3 hours 29 minutes before
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</html>Hazardous weather outlook, Jul 20, 3:31 AM EDT, 11 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE WAKEFIELD VA 331 AM EDT WED JUL 20 2011 NCZ012>017-030>032-VAZ048-049-060>062-064>069-072>079-084>100-210745- NORTHAMPTON NC-HERTFORD-GATES-PASQUOTANK-CAMDEN-INLAND CURRITUCK- BERTIE-CHOWAN-PERQUIMANS-FLUVANNA-LOUISA-PRINCE EDWARD-CUMBERLAND- GOOCHLAND-CAROLINE-MECKLENBURG-LUNENBURG-NOTTOWAY-AMELIA-POWHATAN- KING WILLIAM-KING AND QUEEN-ESSEX-WESTMORELAND-RICHMOND- NORTHUMBERLAND-LANCASTER-BRUNSWICK-GLOUCESTER-MIDDLESEX-MATHEWS- GREENSVILLE-SUSSEX-SURRY-JAMES CITY-YORK-SOUTHAMPTON-ISLE OF WIGHT- NEWPORT NEWS/HAMPTON-NORFOLK/PORTSMOUTH-SUFFOLK-CHESAPEAKE- VIRGINIA BEACH-ACCOMACK-NORTHAMPTON VA- 331 AM EDT WED JUL 20 2011 ...EXCESSIVE HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH SATURDAY EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR COASTAL NORTHEAST NORTH CAROLINA...INTERIOR NORTHEAST NORTH CAROLINA...CENTRAL VIRGINIA...EAST CENTRAL VIRGINIA...INTERIOR SOUTHEAST VIRGINIA...SOUTH CENTRAL VIRGINIA...SOUTH HAMPTON ROADS VIRGINIA...THE EASTERN SHORE OF VIRGINIA...THE MIDDLE PENINSULA OF VIRGINIA...THE NORTHERN NECK OF VIRGINIA...THE PENINSULA OF SOUTHEAST VIRGINIA AND THE PIEDMONT OF CENTRAL VIRGINIA. .DAY ONE...TODAY AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. EXCESSIVE HEAT WATCH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MDZ025-NCZ102-210745- MARYLAND BEACHES-OUTER BANKS CURRITUCK- 331 AM EDT WED JUL 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE LOWER EASTERN SHORE OF MARYLAND AND THE NORTHERN OUTER BANKS OF NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MDZ021>024-VAZ063-070-071-080>083-210745- DORCHESTER-WICOMICO-SOMERSET-INLAND WORCESTER-HANOVER-CHESTERFIELD- HENRICO-DINWIDDIE-PRINCE GEORGE-CHARLES CITY-NEW KENT- 331 AM EDT WED JUL 20 2011 ...AIR QUALITY ALERT IN EFFECT FROM 8 AM THIS MORNING TO MIDNIGHT EDT TONIGHT... ...EXCESSIVE HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH SATURDAY EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE LOWER EASTERN SHORE OF MARYLAND...CENTRAL VIRGINIA...EAST CENTRAL VIRGINIA AND SOUTH CENTRAL VIRGINIA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. AIR QUALITY ALERT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. EXCESSIVE HEAT WATCH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. ANZ630>634-650-652-654-656-658-210745- CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA- CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA- CHESAPEAKE BAY FROM NEW POINT COMFORT TO LITTLE CREEK VA- CURRITUCK SOUND- CHESAPEAKE BAY FROM LITTLE CREEK TO CAPE HENRY VA...INCLUDING THE CHESAPEAKE BAY BRIDGE TUNNEL- COASTAL WATERS FROM FENWICK ISLAND DE TO CHINCOTEAGUE VA OUT TO 20 NM- COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT TO 20 NM- COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT TO 20 NM- COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT TO 20 NM- COASTAL WATERS FROM NC VA BORDER TO CURRITUCK BEACH LIGHT NC OUT TO 20 NM- 331 AM EDT WED JUL 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL CHESAPEAKE BAY...THE SOUTHERN CHESAPEAKE BAY...THE MID ATLANTIC COASTAL WATERS AND CURRITUCK SOUND. .DAY ONE...TODAY AND TONIGHT. HAZARDOUS WEATHER IS NOT EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. HURLEY
In the hours before
Special weather statement, Jul 20, 2:18 PM EDT, 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WAKEFIELD VA 218 PM EDT WED JUL 20 2011 VAZ097-098-201900- CHESAPEAKE VA-VIRGINIA BEACH VA- 218 PM EDT WED JUL 20 2011 ...STRONG THUNDERSTORM OVER CHESAPEAKE AND SOUTHERN VIRGINIA BEACH... AT 217 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER FENTRESS...OR JUST WEST OF THE BACK BAY. THE STORMS WERE NEARLY STATIONARY. THIS AREA OF HEAVY SHOWERS AND STRONG THUNDERSTORMS WILL BE NEAR BACK BAY AT 230 PM EDT. EXPECT FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAINFALL WITH THESE STORMS. PONDING OF WATER ON ROADWAYS AND FLOODING OF LOW LYING AND FLOOD PRONE AREAS IS ALSO POSSIBLE. IF YOU HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE INTO A SAFE SHELTER BEFORE THESE STORMS REACH YOUR AREA. REMAIN INDOORS UNTIL THE STORMS HAVE PASSED. LAT...LON 3655 7599 3655 7624 3676 7624 3675 7602 MMONTE
Special weather statement, Jul 20, 2:32 PM EDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WAKEFIELD VA
232 PM EDT WED JUL 20 2011
MDZ021>024-VAZ099-201930-
ACCOMACK VA-DORCHESTER MD-INLAND WORCESTER MD-SOMERSET MD-WICOMICO MD-
232 PM EDT WED JUL 20 2011
...STRONG THUNDERSTORMS OVER THE MARYLAND LOWER EASTERN SHORE...
AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
CLUSTERS OF THUNDERSTORM EXTENDING FROM JUST SOUTH OF SALISBURY TO
NEAR PRINCESS ANNE. THESE STORMS WERE NEARLY STATIONARY...AND WILL
CONTINUE TO IMPACT WICOMICO AND SOMERSET COUNTIES...MAINLY TO THE
EAST OF OCEAN HIGHWAY THROUGH 3 PM. ADDITIONAL ISOLATED THUNDERSTORM
DEVELOPMENT WILL BE POSSIBLE ACROSS THE LOWER EASTERN SHORE OVER THE
NEXT HOUR.
EXPECT FREQUENT CLOUD TO GROUND LIGHTNING AND HEAVY RAINFALL WITH
THESE STORMS. PONDING OF WATER ON ROADWAYS AND FLOODING OF LOW LYING
AND FLOOD PRONE AREAS IS ALSO POSSIBLE. IF YOU HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE INTO A SAFE SHELTER
BEFORE THESE STORMS REACH YOUR AREA. REMAIN INDOORS UNTIL THE STORMS
HAVE PASSED.
LAT...LON 3780 7551 3780 7578 3786 7570 3786 7573
3789 7571 3789 7576 3791 7577 3795 7567
3797 7578 3795 7581 3805 7584 3806 7582
3811 7586 3814 7584 3813 7586 3820 7588
3822 7585 3823 7589 3833 7591 3835 7544
MMONTEThe office that day
Everything else NWS Wakefield, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 8:34 PM EDT | Special Weather Statement | AKQ | Northumberland | 36 min |
| Jul 19, 9:05 PM EDT | Special Weather Statement | AKQ | Northumberland, Westmoreland | 55 min |
| Jul 19, 9:19 PM EDT | Severe Thunderstorm Warning | AKQ | Lancaster, Northumberland, Richmond, Westmoreland | 41 min |
| Jul 19, 9:54 PM EDT | Severe Thunderstorm Warning | AKQ | Essex, King and Queen, Lancaster, Middlesex, Northumberland, Richmond | 51 min |
| Jul 19, 10:53 PM EDT | Special Weather Statement | AKQ | Charles City, Essex, Gloucester, James City, King and Queen, King William and 5 more | 52 min |
| Jul 20, 3:23 AM EDT | Excessive Heat Watch | AKQ | Accomack, Amelia, Brunswick, Caroline, Charles City, Cumberland and 30 more | 24 hr |
| Jul 20, 2:18 PM EDT | Special Weather Statement | AKQ | City of Virginia Beach | 42 min |
| Jul 20, 4:26 PM EDT | Excessive Heat Warning | AKQ | Accomack, Amelia, Brunswick, Caroline, Charles City, Cumberland and 30 more | 3 days |
| Jul 20, 4:26 PM EDT | Heat Advisory | AKQ | Accomack, Northampton, City of Virginia Beach | 38 hr |
| Jul 20, 3:44 PM EDT | Special Weather Statement | AKQ | Pasquotank | 61 min |
| Jul 20, 3:51 PM EDT | Severe Thunderstorm Warning | AKQ | Camden, Pasquotank, Perquimans | 24 min |
| Jul 20, 4:19 PM EDT | Special Weather Statement | AKQ | Pasquotank, Perquimans | 26 min |
| Jul 20, 4:51 PM EDT | Special Weather Statement | AKQ | Bertie | 54 min |
| Jul 20, 4:55 PM EDT | Severe Thunderstorm Warning | AKQ | Bertie | 39 min |
| Jul 20, 2:32 PM EDT | Special Weather Statement | AKQ | Somerset | 58 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2011Severe Thunderstorm Warnings in North Carolina, 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.