Alert archive / Maryland / Tornado Warnings in 2012

Tornado Warning 9, NWS Baltimore/Washington

June 1, 2012Charles County, Prince George's County, Maryland

NWS Baltimore/Washington issued this tornado warning at Jun 1, 2012, 4:12 PM EDT for Charles County, Prince George's County, Maryland. It was in force for 33 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: Jun 1, 2012, 4:12 PM EDT (20:12 UTC)
Expired: Jun 1, 2012, 4:45 PM EDT
In force: 33 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon

Counties Charles County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 53 km from the middle of the area, began a volume at 20:12 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

Time	Report	Where	Remark
Jun 1, 4:16 PM EDT	TSTM WND DMG	Potomac Heights, MD	TREE DOWN ALONG INDIAN HEAD HWY CAUSED DAMAGE TO VEHICLE AND MINOR ROOF DAMAGE TO HOUSE
Jun 1, 4:18 PM EDT	TSTM WND DMG	Potomac Heights, MD	TREE DOWN ON 5000 BLOCK OF INDIAN HEAD HWY

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 1, 1:50 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 46 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: 26 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1061 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 174 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.

453 
WFUS51 KLWX 012012
TORLWX
MDC017-033-012045-
/O.NEW.KLWX.TO.W.0009.120601T2012Z-120601T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
412 PM EDT FRI JUN 1 2012

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CHARLES COUNTY IN SOUTHERN MARYLAND...
  SOUTHWESTERN PRINCE GEORGES COUNTY IN CENTRAL MARYLAND...

* UNTIL 445 PM EDT

* AT 412 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR INDIAN
  HEAD...MOVING NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WALDORF...

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.

&&

LAT...LON 3864 7685 3856 7715 3860 7720 3862 7718
      3861 7715 3863 7713 3872 7703 3872 7692
TIME...MOT...LOC 2013Z 233DEG 24KT 3859 7714

$$

KRAMAR

1 follow-up statement

416 
WWUS51 KLWX 012033
SVSLWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
433 PM EDT FRI JUN 1 2012

MDC017-033-012045-
/O.CON.KLWX.TO.W.0009.000000T0000Z-120601T2045Z/
CHARLES MD-PRINCE GEORGES MD-
433 PM EDT FRI JUN 1 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM EDT FOR PRINCE
GEORGES AND CHARLES COUNTIES...

AT 429 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS
TORNADO WAS LOCATED 6 MILES EAST OF INDIAN HEAD...MOVING NORTHEAST AT
20 MPH.

LOCATIONS IMPACTED INCLUDE...
  ACCOKEEK...
  NORTHWOOD...
  WALDORF...

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.

THIS TORNADO MAY BE WRAPPED IN RAIN AND HARD TO SEE. DO NOT WAIT TO
SEE OR HEAR THE TORNADO. TAKE COVER NOW.

&&

LAT...LON 3864 7685 3858 7711 3863 7713 3872 7703
      3872 7692
TIME...MOT...LOC 2033Z 237DEG 16KT 3864 7704

$$



HTS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 1:47 PM EDT	Special Weather Statement	LWX	Montgomery	43 min
Jun 1, 1:49 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Montgomery	41 min
Jun 1, 2:05 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	40 min
Jun 1, 2:16 PM EDT	Tornado Warning	LWX	Carroll, Frederick, Howard, Montgomery	29 min
Jun 1, 2:19 PM EDT	Tornado Warning	LWX	Montgomery	26 min
Jun 1, 2:35 PM EDT	Tornado Warning	LWX	Carroll, Frederick, Howard, Montgomery	25 min
Jun 1, 2:38 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, Howard, Montgomery	52 min
Jun 1, 2:44 PM EDT	Severe Thunderstorm Warning	LWX	Montgomery	46 min
Jun 1, 2:54 PM EDT	Severe Thunderstorm Warning	LWX	Carroll, Frederick, Howard, Montgomery	66 min
Jun 1, 2:54 PM EDT	Tornado Warning	LWX	Carroll	51 min
Jun 1, 3:06 PM EDT	Tornado Warning	LWX	Carroll, Howard, Montgomery	24 min
Jun 1, 3:18 PM EDT	Flash Flood Warning	LWX	Carroll, Frederick, Howard, Montgomery	6 hr
Jun 1, 3:23 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	52 min
Jun 1, 3:30 PM EDT	Tornado Warning	LWX	Baltimore, Carroll, Harford	45 min
Jun 1, 3:40 PM EDT	Flash Flood Watch	LWX	Allegany, Baltimore, Carroll, Frederick, Prince George's, Washington and 1 more	8 hr
Jun 1, 3:47 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	43 min
Jun 1, 4:07 PM EDT	Flash Flood Warning	LWX	Baltimore, Carroll	6 hr
Jun 1, 4:13 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	32 min
Jun 1, 4:22 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Carroll	23 min
Jun 1, 4:24 PM EDT	Tornado Warning	LWX	Baltimore, Carroll	36 min
Jun 1, 4:29 PM EDT	Severe Thunderstorm Warning	LWX	Charles, Prince George's	46 min
Jun 1, 4:31 PM EDT	Tornado Warning	LWX	Anne Arundel, Baltimore, Howard	29 min
Jun 1, 4:43 PM EDT	Tornado Warning	LWX	Prince George's	32 min
Jun 1, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	44 min
Jun 1, 4:49 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Prince George's	41 min
Jun 1, 4:51 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, City of Baltimore	39 min
Jun 1, 5:22 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	38 min
Jun 1, 5:23 PM EDT	Tornado Warning	LWX	Anne Arundel, Howard, Prince George's	37 min
Jun 1, 5:28 PM EDT	Tornado Warning	LWX	Frederick	32 min
Jun 1, 5:32 PM EDT	Flash Flood Warning	LWX	Montgomery, Prince George's	6 hr
Jun 1, 5:36 PM EDT	Flash Flood Warning	LWX	Baltimore, City of Baltimore	6 hr
Jun 1, 5:49 PM EDT	Severe Thunderstorm Warning	LWX	Allegany	41 min
Jun 1, 5:56 PM EDT	Tornado Warning	LWX	Harford	34 min
Jun 1, 5:56 PM EDT	Tornado Warning	LWX	Anne Arundel, Baltimore, Howard	23 min
Jun 1, 6:06 PM EDT	Coastal Flood Advisory	LWX	Prince George's	2 hr
Jun 1, 6:14 PM EDT	Tornado Warning	LWX	Allegany	31 min
Jun 1, 6:16 PM EDT	Flash Flood Warning	LWX	Baltimore, Harford	6 hr
Jun 1, 6:22 PM EDT	Tornado Warning	LWX	Harford	38 min
Jun 1, 6:29 PM EDT	Severe Thunderstorm Warning	LWX	Allegany, Washington	46 min
Jun 1, 6:35 PM EDT	Flash Flood Warning	LWX	Anne Arundel, Baltimore, Howard, Montgomery, Prince George's	5 hr
Jun 1, 6:55 PM EDT	Tornado Warning	LWX	Anne Arundel, Howard, Prince George's	35 min
Jun 1, 7:15 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Howard, City of Baltimore	26 min
Jun 1, 7:19 PM EDT	Tornado Warning	LWX	Anne Arundel, Baltimore, City of Baltimore	26 min
Jun 1, 7:20 PM EDT	Severe Thunderstorm Warning	LWX	Washington	40 min
Jun 1, 7:29 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	31 min
Jun 1, 7:35 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Harford, City of Baltimore	40 min

Nearby

Tornado Warnings in Maryland, 2012 Every tornado warning in 2012 Tornadoes 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.