Alert archive / Maryland / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 4, NWS Philadelphia/Mount Holly

February 21, 2014Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Feb 21, 2014, 12:55 PM EST for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Sussex County, Delaware. It was in force for 65 min. 3 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: Feb 21, 2014, 12:55 PM EST (17:55 UTC)
Expired: Feb 21, 2014, 2:00 PM EST
In force: 65 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, Sussex County, DE, Caroline County, MD, Queen Anne's County, MD, Talbot County, MD

The radar

The Dover AFB radar (KDOX), 43 km from the middle of the area, began a volume at 17:57 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
Feb 21, 1:10 PM EST	TSTM WND DMG	Preston, MD	A FARM BUILDING WAS DAMAGED IN PRESTON.
Feb 21, 1:44 PM EST	TSTM WND GST 47	Dover Afb, DE
Feb 21, 1:51 PM EST	TSTM WND DMG	Preston, MD	A FARM BUILDING WAS DAMAGED IN PRESTON.

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
Feb 21, 10:39 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 5.9 hours before the alert went out and 104 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 599 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 206 m²/s²
0-3 km storm-relative helicity: 212 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.

650 
WUUS51 KPHI 211755
SVRPHI
DEC001-005-MDC011-035-041-211900-
/O.NEW.KPHI.SV.W.0004.140221T1755Z-140221T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1255 PM EST FRI FEB 21 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KENT COUNTY IN CENTRAL DELAWARE...
  CAROLINE COUNTY IN EASTERN MARYLAND...
  SUSSEX COUNTY IN SOUTHERN DELAWARE...
  SOUTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 200 PM EST

* AT 1252 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  TILGHMAN ISLAND TO LLOYDS TO CHURCH CREEK TO ANDREWS...MOVING
  NORTHEAST AT 60 MPH. THESE STORMS ARE CAPABLE OF PRODUCING ONE INCH
  DIAMETER HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  ST. MICHAELS AND TRAPPE AROUND 100 PM EST...
  COPPERVILLE AND EASTON AROUND 105 PM EST...
  SKIPTON AND WYE MILLS AROUND 110 PM EST...
  CORDOVA AND QUEEN ANNE AROUND 115 PM EST...
  RIDGELY AND JUMPTOWN AROUND 120 PM EST...
  GREENSBORO AND OAKLAND AROUND 125 PM EST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY INSIDE A
STRONG BUILDING...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON
FOR DELAWARE AND NORTHEASTERN MARYLAND. A TORNADO WATCH ALSO REMAINS
IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON FOR NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3863 7571 3869 7581 3867 7594 3857 7602
      3859 7612 3873 7626 3867 7635 3878 7637
      3876 7636 3887 7626 3881 7621 3882 7620
      3892 7622 3909 7597 3923 7539 3906 7539
      3880 7517 3853 7535 3846 7569
TIME...MOT...LOC 1755Z 237DEG 50KT 3871 7624 3865 7614
          3853 7610 3827 7619

$$

FORECASTER: HEAVENER

1 follow-up statement

055 
WWUS51 KPHI 211830
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
130 PM EST FRI FEB 21 2014

DEC005-MDC035-041-211840-
/O.CAN.KPHI.SV.W.0004.000000T0000Z-140221T1900Z/
SUSSEX DE-QUEEN ANNE'S MD-TALBOT MD-
130 PM EST FRI FEB 21 2014

...THE SEVERE THUNDERSTORM WARNING FOR TALBOT...SOUTHEASTERN QUEEN
ANNE'S AND SUSSEX COUNTIES IS CANCELLED...

THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT
OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON
FOR DELAWARE AND NORTHEASTERN MARYLAND. A TORNADO WATCH ALSO REMAINS
IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON FOR NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 3913 7581 3923 7539 3906 7539 3884 7582
TIME...MOT...LOC 1830Z 233DEG 63KT 3921 7557 3909 7557
          3895 7568

$$

DEC001-MDC011-211900-
/O.CON.KPHI.SV.W.0004.000000T0000Z-140221T1900Z/
KENT DE-CAROLINE MD-
130 PM EST FRI FEB 21 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EST
FOR NORTHEASTERN CAROLINE AND CENTRAL KENT COUNTIES...

AT 129 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM DOVER SPEEDWAY TO WOODSIDE TO 6 MILES SOUTHEAST OF
GREENSBORO...MOVING NORTHEAST AT 70 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
WOODSIDE EAST AND VIOLA AROUND 135 PM EST...
RIVERVIEW AND MAGNOLIA AROUND 140 PM EST...
BOWERS AROUND 145 PM EST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON
FOR DELAWARE AND NORTHEASTERN MARYLAND. A TORNADO WATCH ALSO REMAINS
IN EFFECT UNTIL 500 PM EST FRIDAY AFTERNOON FOR NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3913 7581 3923 7539 3906 7539 3884 7582
TIME...MOT...LOC 1830Z 233DEG 63KT 3921 7557 3909 7557
          3895 7568

$$

FORECASTER: MEOLA

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 4:27 AM EST	Dense Fog Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	11 hr
Feb 21, 12:15 PM EST	Special Weather Statement	PHI	Cecil	60 min
Feb 21, 12:32 PM EST	Severe Thunderstorm Warning	PHI	Cecil	58 min
Feb 21, 12:38 PM EST	Special Weather Statement	PHI	Caroline, Talbot	67 min
Feb 21, 1:43 PM EST	Areal Flood Advisory	PHI	Caroline, Queen Anne's, Talbot	4 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2014 Severe Thunderstorm Warnings in Delaware, 2014 Every severe thunderstorm warning in 2014

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.