Alert archive / Maryland / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 49, NWS Philadelphia/Mount Holly

June 25, 2013Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 25, 2013, 11:01 PM EDT for Caroline County, Queen Anne's County, Talbot County, Maryland; Kent County, Delaware. It was in force for 59 min. 1 report 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 25, 2013, 11:01 PM EDT (03:01 UTC)
Expired
Jun 26, 2013, 12:00 AM EDT
In force
59 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 51 km from the middle of the area, began a volume at 03:02 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.

What was reported inside it

TimeReportWhereRemark
Jun 25, 11:50 PM EDTTSTM WND DMGTrappe, MDTREE DOWN ALONG LLOYDS LANDING ROAD DUE TO THUNDERSTORM OUTFLOW WINDS.

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.

IssuedProductOfficeLasted
Jun 25, 8:46 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 3.0 hours before the alert went out and 120 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 2013-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 813 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 2013-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.1939Sfc1 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
813 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1785 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

985 
WUUS51 KPHI 260301
SVRPHI
DEC001-MDC011-035-041-260400-
/O.NEW.KPHI.SV.W.0049.130626T0301Z-130626T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1101 PM EDT TUE JUN 25 2013

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...
  QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL MIDNIGHT EDT

* AT 1059 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  BETTERTON TO ROCK HALL TO ANNAPOLIS...MOVING SOUTHEAST AT 40 MPH.
  THESE STORMS ARE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  STEVENSVILLE AROUND 1110 PM EDT...
  CHURCH HILL AND CENTREVILLE AROUND 1115 PM EDT...
  GRASONVILLE AND SUDLERSVILLE AROUND 1120 PM EDT...
  WYE MILLS AND STARR AROUND 1125 PM EDT...
  CLAYTON AND SMYRNA AROUND 1130 PM EDT...
  CHESWOLD AND WOODLAND BEACH AROUND 1135 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE STRONGEST WINDS WILL OCCUR ALONG THE GUST FRONT AHEAD OF THE 
HEAVY RAIN.

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE. DO NOT STAY OUTDOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT 
WEDNESDAY MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND.

&&

LAT...LON 3887 7625 3881 7621 3882 7620 3894 7624
      3884 7639 3905 7631 3899 7627 3924 7601
      3937 7551 3931 7543 3906 7538 3884 7557
      3883 7573 3867 7572 3870 7589 3857 7604
      3873 7626 3867 7635 3877 7639
TIME...MOT...LOC 0301Z 307DEG 35KT 3935 7601 3913 7623
          3898 7657

$$

ROBERTSON
1 follow-up statement
694 
WWUS51 KPHI 260338
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1138 PM EDT TUE JUN 25 2013

DEC001-MDC011-035-041-260400-
/O.CON.KPHI.SV.W.0049.000000T0000Z-130626T0400Z/
KENT DE-CAROLINE MD-QUEEN ANNE'S MD-TALBOT MD-
1138 PM EDT TUE JUN 25 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EDT
FOR TALBOT...SOUTHERN QUEEN ANNE'S...CAROLINE AND KENT COUNTIES...

AT 1136 PM EDT...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 WOODLAND BEACH TO RIDGELY TO TILGHMAN ISLAND...MOVING
SOUTHEAST AT 40 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
WOODSIDE AND WOODSIDE EAST AROUND 1145 PM EDT...
RIVERVIEW AND MAGNOLIA AROUND 1150 PM EDT...
HOUSTON AND HARRINGTON AROUND 1155 PM EDT...
FEDERALSBURG AROUND MIDNIGHT EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE STRONGEST WINDS WILL OCCUR ALONG THE GUST FRONT AHEAD OF THE 
HEAVY RAIN.

THIS LINE OF SEVERE THUNDERSTORMS HAS A HISTORY OF PRODUCING WIND 
DAMAGE. DO NOT STAY OUTDOORS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM EDT
WEDNESDAY MORNING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.

&&

LAT...LON 3887 7625 3881 7621 3882 7620 3894 7624
      3884 7639 3890 7637 3906 7602 3936 7550
      3931 7543 3906 7538 3884 7557 3883 7573
      3867 7572 3870 7589 3857 7604 3873 7626
      3867 7635 3877 7639
TIME...MOT...LOC 0337Z 307DEG 35KT 3929 7544 3893 7582
          3871 7633

$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 25, 10:28 PM EDTSevere Thunderstorm WarningPHICecil, Kent62 min
Jun 26, 5:28 PM EDTSpecial Weather StatementPHIKent47 min
Jun 26, 6:13 PM EDTSpecial Weather StatementPHIKent32 min
Jun 26, 7:26 PM EDTSpecial Weather StatementPHIQueen Anne's49 min
Jun 25, 10:47 PM EDTSpecial Weather StatementPHINew Castle58 min
Jun 25, 11:50 PM EDTSpecial Weather StatementPHISussex55 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2013Severe Thunderstorm Warnings in Delaware, 2013Every severe thunderstorm warning in 2013

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.