Alert archive / Delaware / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 43, NWS Philadelphia/Mount Holly

May 27, 2014Kent County, Sussex County, Delaware; Caroline County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 27, 2014, 7:15 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Maryland. It was in force for 60 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: May 27, 2014, 7:15 PM EDT (23:15 UTC)
Expired: May 27, 2014, 8:15 PM EDT
In force: 60 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties Kent County, DE, Sussex County, DE, Caroline County, MD

The radar

The Dover AFB radar (KDOX), 18 km from the middle of the area, began a volume at 23:15 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
May 27, 7:47 PM EDT	TSTM WND GST 51	Harrington, DE

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
May 27, 5:30 PM EDT	Severe Thunderstorm Watch	SPC	3 hr
May 27, 2:13 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.3 hours before the alert went out and 75 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: 1885 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 94 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.

263 
WUUS51 KPHI 272315
SVRPHI
DEC001-005-MDC011-280015-
/O.NEW.KPHI.SV.W.0043.140527T2315Z-140528T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
715 PM EDT TUE MAY 27 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KENT COUNTY IN CENTRAL DELAWARE...
  NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
  NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...

* UNTIL 815 PM EDT

* AT 710 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR GREENSBORO...MOVING
  SOUTHEAST AT 35 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING
  WINDS IN EXCESS OF 60 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  SMITHVILLE...
  HARRINGTON...
  BRIDGEVILLE...
  MILFORD...
  ELLENDALE...
  SLAUGHTER BEACH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...MOVE INDOORS TO A
STURDY BUILDING AND STAY AWAY FROM WINDOWS. WHEN IT IS SAFE TO DO
SO...REPORT SEVERE WEATHER TO LOCAL LAW ENFORCEMENT OR TO THE
NATIONAL WEATHER SERVICE.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN MARYLAND. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT WEDNESDAY MORNING FOR
DELAWARE AND SOUTHERN NEW JERSEY.

&&

LAT...LON 3888 7595 3895 7595 3901 7591 3910 7575
      3894 7529 3893 7532 3887 7524 3885 7523
      3868 7558
TIME...MOT...LOC 2315Z 297DEG 30KT 3896 7575

$$

FORECASTER: GORSE

2 follow-up statements

826 
WWUS51 KPHI 272343
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
743 PM EDT TUE MAY 27 2014

DEC001-005-MDC011-280015-
/O.CON.KPHI.SV.W.0043.000000T0000Z-140528T0015Z/
KENT DE-CAROLINE MD-SUSSEX DE-
743 PM EDT TUE MAY 27 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR NORTHWESTERN SUSSEX...EAST CENTRAL CAROLINE AND SOUTHERN KENT
COUNTIES...

AT 741 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR FARMINGTON...OR 15
MILES NORTHWEST OF GEORGETOWN...MOVING SOUTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BRIDGEVILLE...MILFORD...ELLENDALE AND SLAUGHTER BEACH.

IN ADDITION TO DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING 
IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN MARYLAND. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT WEDNESDAY MORNING FOR
DELAWARE AND SOUTHERN NEW JERSEY.

LAT...LON 3882 7585 3906 7563 3894 7529 3893 7532
      3887 7524 3885 7523 3868 7558
TIME...MOT...LOC 2343Z 299DEG 25KT 3886 7555

$$

GORSE

000 
WWUS51 KPHI 280007
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
807 PM EDT TUE MAY 27 2014

DEC001-005-MDC011-280016-
/O.EXP.KPHI.SV.W.0043.000000T0000Z-140528T0015Z/
KENT DE-CAROLINE MD-SUSSEX DE-
807 PM EDT TUE MAY 27 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUSSEX...EAST
CENTRAL CAROLINE AND SOUTHERN KENT COUNTIES WILL EXPIRE AT 815 PM
EDT...

THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING IS MOVING OUT OF 
THIS WARNED AREA, THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. A 
NEW WARNING HAS BEEN ISSUED FOR SUSSEX COUNTY IN DELAWARE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
TUESDAY EVENING FOR NORTHEASTERN MARYLAND. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT EDT WEDNESDAY MORNING FOR
SOUTHERN DELAWARE AND SOUTHERN NEW JERSEY.

LAT...LON 3882 7585 3906 7563 3894 7529 3893 7532
      3887 7524 3885 7523 3868 7558
TIME...MOT...LOC 0006Z 299DEG 25KT 3878 7537

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 5:52 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	53 min
May 27, 5:56 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	64 min
May 27, 6:19 PM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
May 27, 6:49 PM EDT	Special Weather Statement	PHI	Kent	56 min
May 27, 7:55 PM EDT	Severe Thunderstorm Warning	PHI	Sussex	65 min
May 27, 2:39 PM EDT	Special Weather Statement	PHI	Queen Anne's	36 min
May 27, 5:34 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's	41 min
May 27, 5:48 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Kent, Queen Anne's	42 min
May 27, 7:23 PM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's, Talbot	52 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2014 Severe Thunderstorm Warnings in Maryland, 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.