Alert archive / Maryland / Wind Advisories in 2012
Wind Advisory 13, NWS Baltimore/Washington
NWS Baltimore/Washington issued this wind advisory at Dec 30, 2012, 9:31 AM EST for 10 counties in Maryland; Berkeley County, Jefferson County, Morgan County, West Virginia; 5 counties in Virginia. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Dec 30, 2012, 9:31 AM EST (14:31 UTC)
- Expired
- Dec 30, 2012, 3:00 PM EST
- In force
- 5 hr
- Issued by
- NWS Baltimore/Washington
Counties Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Prince George's County, MD, Saint Mary's County, MD, Washington County, MD, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, Fairfax County, VA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 29 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 23 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1084 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
521 WWUS71 KLWX 301431 NPWLWX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 931 AM EST SUN DEC 30 2012 DCZ001-MDZ003>007-009>011-013-014-016>018-VAZ042-053-054- WVZ051>053-302000- /O.NEW.KLWX.WI.Y.0013.121230T1431Z-121230T2000Z/ DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-LOUDOUN- FAIRFAX-ARLINGTON/FALLS CHURCH/ALEXANDRIA-MORGAN-BERKELEY- JEFFERSON- INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK... WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS... WALDORF...ST MARYS CITY...LEESBURG...FAIRFAX...ALEXANDRIA... FALLS CHURCH...MARTINSBURG...CHARLES TOWN 931 AM EST SUN DEC 30 2012 ...WIND ADVISORY IN EFFECT UNTIL 3 PM EST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 3 PM EST THIS AFTERNOON. * TIMING...UNTIL 3PM. * WINDS...NORTHWEST 25 TO 30 MPH WITH GUSTS UP TO 50 MPH. * IMPACTS...DOWNED TREES AND POWER LINES WILL BE POSSIBLE FROM THE HIGHER WIND GUSTS. ALSO...HIGH PROFILE VEHICLES SHOULD TAKE CAUTION IN EXPOSED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT WIND GUSTS OF 45 TO 55 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT... ESPECIALLY FOR HIGH PROFILE VEHICLES. && $$ JACKSON
1 follow-up statement
797 WWUS71 KLWX 301956 NPWLWX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 256 PM EST SUN DEC 30 2012 DCZ001-MDZ003>007-009>011-013-014-016>018-VAZ042-053-054- WVZ051>053-302100- /O.EXP.KLWX.WI.Y.0013.000000T0000Z-121230T2000Z/ DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL- NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE- PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-LOUDOUN- FAIRFAX-ARLINGTON/FALLS CHURCH/ALEXANDRIA-MORGAN-BERKELEY- JEFFERSON- INCLUDING THE CITIES OF...WASHINGTON...HAGERSTOWN...FREDERICK... WESTMINSTER...GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS... WALDORF...ST MARYS CITY...LEESBURG...FAIRFAX...ALEXANDRIA... FALLS CHURCH...MARTINSBURG...CHARLES TOWN 256 PM EST SUN DEC 30 2012 ...WIND ADVISORY WILL EXPIRE AT 3 PM EST THIS AFTERNOON... WIND GUSTS DIMINISH THROUGH THE REST OF THE AFTERNOON. UNTIL 5PM...EXPECT GUSTS TO AROUND 35 MPH. $$ JACKSON
The office that day
Everything else NWS Baltimore/Washington issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 30, 11:02 AM EST | Winter Weather Advisory | LWX | Allegany | 4 hr |
| Dec 30, 12:32 AM EST | Gale Warning | LWX | 17 hr | |
| Dec 30, 12:32 AM EST | Small Craft Advisory | LWX | 27 hr |
Nearby
Wind Advisories in Maryland, 2012Wind Advisories in Virginia, 2012Wind Advisories in West Virginia, 2012Every wind advisory 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.