Alert archive / Delaware / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 73, NWS Philadelphia/Mount Holly

July 2, 2014Kent County, Sussex County, Delaware; Caroline County, Talbot County, Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 2, 2014, 11:47 PM EDT for Kent County, Sussex County, Delaware; Caroline County, Talbot County, Maryland. It was in force for 58 min. 4 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: Jul 2, 2014, 11:47 PM EDT (03:47 UTC)
Expired: Jul 3, 2014, 12:45 AM EDT
In force: 58 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 18 km from the middle of the area, began a volume at 03:50 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
Jul 3, 12:10 AM EDT	TSTM WND DMG	Greensboro, MD	TREE DOWN ALONG GREENSBORO ROAD. TIME ESTIMATED FROM RADAR
Jul 3, 12:23 AM EDT	TSTM WND DMG	Marydel, DE	TREES AND WIRES DOWN.
Jul 3, 12:34 AM EDT	TSTM WND GST 51	Voshell Cove, DE
Jul 3, 12:38 AM EDT	TSTM WND DMG	Cheswold, DE	TREES AND WIRES DOWN.

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.8 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: 2489 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 110 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.

703 
WUUS51 KPHI 030347
SVRPHI
DEC001-005-MDC011-041-030445-
/O.NEW.KPHI.SV.W.0073.140703T0347Z-140703T0445Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1147 PM EDT WED JUL 2 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...
  NORTHWESTERN SUSSEX COUNTY IN SOUTHERN DELAWARE...
  NORTHEASTERN TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 1245 AM EDT

* AT 1143 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS. THESE SEVERE STORMS EXTENDED FROM
  MATTHEWS TO PRESTON TO FEDERALSBURG...MOVING NORTHEAST AT 25 MPH.
  THESE STORMS ARE CAPABLE OF PRODUCING ONE INCH DIAMETER HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. 

* SEVERE THUNDERSTORMS WILL BE NEAR...
  GRIFFIN AND AGNER AROUND 1155 PM EDT...
  SMITHVILLE AROUND MIDNIGHT EDT...
  RIDGELY AND JUMPTOWN AROUND 1205 AM EDT...
  OAKLAND AROUND 1215 AM EDT...
  GREENSBORO AND ANDREWSVILLE AROUND 1220 AM EDT...
  GOLDSBORO AROUND 1225 AM EDT...

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 LINE OF
SEVERE THUNDERSTORMS. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 3864 7572 3868 7576 3867 7579 3870 7583
      3868 7592 3881 7601 3887 7595 3893 7595
      3926 7560 3908 7544 3907 7539 3902 7533
      3894 7530 3893 7532 3891 7529 3860 7570
TIME...MOT...LOC 0347Z 222DEG 21KT 3883 7594 3873 7585
          3871 7579 3867 7572

$$

FORECASTER: HEAVENER

2 follow-up statements

273 
WWUS51 KPHI 030429
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1229 AM EDT THU JUL 3 2014

MDC041-030439-
/O.CAN.KPHI.SV.W.0073.000000T0000Z-140703T0445Z/
TALBOT MD-
1229 AM EDT THU JUL 3 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TALBOT COUNTY IS
CANCELLED...

LAT...LON 3900 7588 3926 7560 3908 7544 3907 7539
      3902 7533 3894 7530 3893 7532 3891 7529
      3873 7552
TIME...MOT...LOC 0429Z 222DEG 21KT 3901 7573 3891 7564
          3889 7558 3885 7551

$$

DEC001-005-MDC011-030445-
/O.CON.KPHI.SV.W.0073.000000T0000Z-140703T0445Z/
KENT DE-CAROLINE MD-SUSSEX DE-
1229 AM EDT THU JUL 3 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM EDT
FOR NORTH CENTRAL SUSSEX...NORTHEASTERN CAROLINE AND KENT COUNTIES...

AT 1227 AM 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 SANDTOWN TO ANDREWSVILLE TO FARMINGTON...OR ALONG A
LINE EXTENDING FROM 16 MILES SOUTHWEST OF DOVER TO 19 MILES SOUTH OF
DOVER TO 17 MILES NORTHWEST OF GEORGETOWN TO 13 MILES NORTHWEST OF
GEORGETOWN...MOVING NORTHEAST AT 25 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  SANDTOWN...HENDERSON AND HARRINGTON BY 1235 AM EDT...
  MARYDEL AND HOUSTON BY 1240 AM EDT...
  FELTON...VIOLA...HAZLETTVILLE AND WOODSIDE BY 1245 AM EDT...

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.

IN ADDITION TO LARGE HAIL AND 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.

LAT...LON 3900 7588 3926 7560 3908 7544 3907 7539
      3902 7533 3894 7530 3893 7532 3891 7529
      3873 7552
TIME...MOT...LOC 0429Z 222DEG 21KT 3901 7573 3891 7564
          3889 7558 3885 7551

$$

HEAVENER

975 
WWUS51 KPHI 030443
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1243 AM EDT THU JUL 3 2014

DEC001-005-MDC011-030453-
/O.EXP.KPHI.SV.W.0073.000000T0000Z-140703T0445Z/
KENT DE-CAROLINE MD-SUSSEX DE-
1243 AM EDT THU JUL 3 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SUSSEX...
NORTHEASTERN CAROLINE AND KENT COUNTIES WILL EXPIRE AT 1245 AM EDT...

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.

LAT...LON 3900 7588 3926 7560 3908 7544 3907 7539
      3902 7533 3894 7530 3893 7532 3891 7529
      3873 7552
TIME...MOT...LOC 0443Z 222DEG 21KT 3907 7566 3897 7557
          3895 7551 3891 7544

$$
 
HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 8:08 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	52 min
Jul 2, 10:24 PM EDT	Special Weather Statement	PHI	New Castle	36 min
Jul 3, 12:04 AM EDT	Severe Thunderstorm Warning	PHI	Kent, New Castle	56 min
Jul 3, 12:34 AM EDT	Areal Flood Advisory	PHI	Kent, New Castle	3 hr
Jul 3, 12:41 AM EDT	Severe Thunderstorm Warning	PHI	Kent	50 min
Jul 3, 3:27 PM EDT	High Surf Advisory	PHI	Sussex	41 hr
Jul 3, 6:21 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	39 min
Jul 2, 10:50 PM EDT	Special Weather Statement	PHI	Talbot	55 min
Jul 2, 11:20 PM EDT	Special Weather Statement	PHI	Caroline, Queen Anne's	55 min
Jul 2, 11:24 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's, Talbot	66 min
Jul 3, 5:36 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	69 min
Jul 3, 7:00 PM EDT	Special Weather Statement	PHI	Caroline, Kent, Queen Anne's, Talbot	60 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.