Alert archive / Virginia / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 237, NWS Baltimore/Washington

July 30, 2016Culpeper County, Madison County, Orange County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 30, 2016, 3:01 PM EDT for Culpeper County, Madison County, Orange County, Virginia. It was in force for 44 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 30, 2016, 3:01 PM EDT (19:01 UTC)
Expired: Jul 30, 2016, 3:45 PM EDT
In force: 44 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Culpeper County, VA, Madison County, VA, Orange County, VA

The radar

The Sterling radar (KLWX), 84 km from the middle of the area, began a volume at 19:02 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, 7.0 hours before the alert went out and 87 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 523 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 1000 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 58 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

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 Jul 30, 10:21 AM EDT, 4 hours 40 minutes earlier.

Area forecast discussion, Jul 30, 10:21 AM EDT, 4 hours 40 minutes before

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Hazardous weather outlook, Jul 30, 5:21 AM EDT, 9 hours 40 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
521 AM EDT SAT JUL 30 2016

ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-310930-
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-SOUTHERN BALTIMORE-PRINCE GEORGES-
ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-SOUTHEAST HARFORD-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
521 AM EDT SAT JUL 30 2016

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...TODAY AND TONIGHT

THUNDERSTORMS WITH HEAVY RAIN WILL BE POSSIBLE THIS AFTERNOON AND
EVENING. THIS COULD LEAD TO LOCALIZED FLASH FLOODING.

ISOLATED THUNDERSTORMS CAPABLE OF PRODUCING STRONG WIND GUSTS
WILL BE POSSIBLE OVER THE WATERS THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053-
055-501>506-310930-
WASHINGTON-FREDERICK MD-CARROLL-NORTHERN BALTIMORE-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-
NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-
NORTHWEST HOWARD-CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-
AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-
NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-ORANGE-CULPEPER-
NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-WESTERN LOUDOUN-EASTERN LOUDOUN-
NORTHERN VIRGINIA BLUE RIDGE-CENTRAL VIRGINIA BLUE RIDGE-
HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-WESTERN GRANT-
EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-WESTERN PENDLETON-
EASTERN PENDLETON-
521 AM EDT SAT JUL 30 2016

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...TODAY AND TONIGHT

THUNDERSTORMS WITH HEAVY RAIN WILL BE POSSIBLE THIS AFTERNOON AND
EVENING. THIS COULD LEAD TO LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 30, 11:25 AM EDT	Special Marine Warning	LWX		95 min
Jul 30, 3:55 PM EDT	Areal Flood Warning	LWX	Albemarle, Augusta	6 hr
Jul 30, 3:56 PM EDT	Areal Flood Warning	LWX	Albemarle	6 hr
Jul 30, 4:02 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	43 min
Jul 30, 4:05 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Greene, Madison, Orange, City of Charlottesville	40 min
Jul 30, 4:16 PM EDT	Flash Flood Warning	LWX	Albemarle, City of Charlottesville	3 hr
Jul 30, 4:35 PM EDT	Small Craft Advisory	LWX		5 hr
Jul 30, 4:42 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	28 min
Jul 30, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier, Loudoun, Rappahannock	27 min
Jul 30, 4:56 PM EDT	Areal Flood Warning	LWX	Fauquier, Rappahannock, Warren	6 hr
Jul 30, 5:54 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Fauquier, Prince William, City of Manassas, City of Manassas Park	51 min
Jul 30, 6:51 PM EDT	Areal Flood Warning	LWX	Greene, Page, Rockingham	3 hr
Jul 30, 7:00 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun	45 min
Jul 30, 7:05 PM EDT	Special Marine Warning	LWX		85 min
Jul 30, 7:14 PM EDT	Flash Flood Warning	LWX	Culpeper, Fauquier, Madison, Page, Rappahannock	3 hr
Jul 30, 7:31 PM EDT	Areal Flood Warning	LWX	Loudoun	6 hr
Jul 30, 7:59 PM EDT	Special Marine Warning	LWX		61 min
Jul 30, 3:08 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel, Calvert, Saint Mary's	15 hr
Jul 30, 4:11 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Washington	49 min
Jul 30, 7:09 PM EDT	Areal Flood Warning	LWX	Carroll, Frederick	6 hr
Jul 30, 7:18 PM EDT	Flash Flood Warning Emergency	LWX	Anne Arundel, Baltimore, Carroll, Frederick, Howard, Montgomery and 1 more	9 hr

Nearby

Severe Thunderstorm Warnings in Virginia, 2016 Every severe thunderstorm warning in 2016

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.