Alert archive / Maryland / Tornado Warnings in 2012

Tornado Warning 32, NWS Baltimore/Washington

August 14, 2012Baltimore County, Carroll County, City of Baltimore, Maryland

NWS Baltimore/Washington issued this tornado warning at Aug 14, 2012, 8:49 PM EDT for Baltimore County, Carroll County, City of Baltimore, Maryland. It was in force for 26 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 14, 2012, 8:49 PM EDT (00:49 UTC)
Expired
Aug 14, 2012, 9:15 PM EDT
In force
26 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Baltimore County, MD, Carroll County, MD, City of Baltimore, MD

The radar

The Sterling radar (KLWX), 81 km from the middle of the area, began a volume at 00:49 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.

What was reported inside it

TimeReportWhereRemark
Aug 14, 9:10 PM EDTHAIL 0.882 Sw Towson, MD
Aug 14, 9:15 PM EDTTSTM WND DMGTowson, MDTREE DOWN ON WEST CHESAPEAKE AVE AT WOODBINE AVE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.8 hours before the alert went out and 77 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2012-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 833 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2012-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
833 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
1690 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

803 
WFUS51 KLWX 150049
TORLWX
MDC005-013-510-150115-
/O.NEW.KLWX.TO.W.0032.120815T0049Z-120815T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
849 PM EDT TUE AUG 14 2012

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CARROLL COUNTY IN NORTH CENTRAL MARYLAND...
  CENTRAL BALTIMORE COUNTY IN NORTHERN MARYLAND...
  NORTHWESTERN BALTIMORE CITY IN NORTHERN MARYLAND...

* UNTIL 915 PM EDT

* AT 849 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS NEAR MILFORD MILL...OR NEAR FALLSTAFF...AND WAS MOVING
  NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LOCHEARN...
  HOWARD PARK...
  OWINGS MILLS...
  FALLSTAFF...
  PIKESVILLE...
  ROLAND PARK...
  TOWSON...
  HOMELAND...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...EITHER PARK AND STAY IN YOUR VEHICLE...OR ABANDON YOUR
VEHICLE AND LAY FLAT IN A LOW SPOT.

&&

LAT...LON 3942 7643 3928 7676 3930 7680 3932 7680
      3932 7682 3937 7692 3959 7662
TIME...MOT...LOC 0050Z 226DEG 10KT 3934 7677

$$


BJL
1 follow-up statement
434 
WWUS51 KLWX 150055
SVSLWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
855 PM EDT TUE AUG 14 2012

MDC013-150105-
/O.CAN.KLWX.TO.W.0032.000000T0000Z-120815T0115Z/
CARROLL MD-
855 PM EDT TUE AUG 14 2012

...THE TORNADO WARNING IS CANCELLED FOR CARROLL COUNTY...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS EXITED THE WARNED
AREA. THUS THE TORNADO WARNING HAS BEEN CANCELLED.

LAT...LON 3942 7643 3931 7668 3929 7675 3937 7686
      3954 7669 3959 7662
TIME...MOT...LOC 0055Z 240DEG 9KT 3935 7676

$$

MDC005-510-150115-
/O.CON.KLWX.TO.W.0032.000000T0000Z-120815T0115Z/
BALTIMORE MD-BALTIMORE CITY MD-
855 PM EDT TUE AUG 14 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR THE
BALTIMORE CITY...AND BALTIMORE COUNTY...

AT 853 PM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR MILFORD MILL...OR NEAR FALLSTAFF...AND WAS MOVING
NORTHEAST AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
  LOCHEARN...
  OWINGS MILLS...
  GARRISON...
  GWYNN OAK...
  HOWARD PARK...
  FALLSTAFF...
  PIKESVILLE...
  PIMLICO...
  STEVENSON...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING AND AVOID WINDOWS. IF OUTDOORS OR IN A MOBILE HOME OR
VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT...EITHER PARK AND STAY IN YOUR VEHICLE...OR ABANDON YOUR
VEHICLE AND LAY FLAT IN A LOW SPOT.

&&

LAT...LON 3942 7643 3931 7668 3929 7675 3937 7686
      3954 7669 3959 7662
TIME...MOT...LOC 0055Z 240DEG 9KT 3935 7676

$$


BJL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 14, 8:10 PM EDTSpecial Weather StatementLWXCarroll35 min
Aug 14, 8:14 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Harford46 min
Aug 14, 8:32 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Howard, City of Baltimore43 min
Aug 14, 9:13 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford, City of Baltimore47 min
Aug 14, 9:32 PM EDTFlash Flood WarningLWXBaltimore, Howard, City of Baltimore5 hr
Aug 14, 9:48 PM EDTSpecial Weather StatementLWXCarroll27 min
Aug 14, 9:54 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford, City of Baltimore51 min
Aug 14, 10:03 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford, City of Baltimore42 min
Aug 14, 10:14 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll, Frederick46 min
Aug 14, 10:37 PM EDTTornado WarningLWXBaltimore, Harford23 min
Aug 14, 10:43 PM EDTFlash Flood WarningLWXBaltimore, Harford2 hr
Aug 14, 10:57 PM EDTSpecial Weather StatementLWXBaltimore48 min
Aug 14, 11:06 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford39 min
Aug 14, 11:16 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford34 min
Aug 15, 1:35 AM EDTFlash Flood WarningLWXBaltimore62 min
Aug 15, 2:35 AM EDTAreal Flood WarningLWXBaltimore, City of Baltimore115 min
Aug 15, 3:25 PM EDTSpecial Weather StatementLWXCity of Baltimore35 min

Nearby

Tornado Warnings in Maryland, 2012Every tornado warning in 2012Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.