Alert archive / Maryland / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 134, NWS Philadelphia/Mount Holly

July 15, 2014Cecil County, Kent County, Queen Anne's County, Maryland; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 15, 2014, 3:18 PM EDT for Cecil County, Kent County, Queen Anne's County, Maryland; New Castle County, Delaware. It was in force for 42 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: Jul 15, 2014, 3:18 PM EDT (19:18 UTC)
Expired: Jul 15, 2014, 4:00 PM EDT
In force: 42 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cecil County, MD, Kent County, MD, Queen Anne's County, MD

The radar

The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 19:23 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 15, 3:50 PM EDT	TSTM WND DMG	Cecilton, MD	TREE DOWN ON TO POWER LINES

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
Jul 15, 1:43 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.3 hours before the alert went out and 16 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: 1120 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 730 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

356 
WUUS51 KPHI 151918
SVRPHI
DEC003-MDC015-029-035-152000-
/O.NEW.KPHI.SV.W.0134.140715T1918Z-140715T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
318 PM EDT TUE JUL 15 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
  KENT COUNTY IN NORTHEAST MARYLAND...
  NORTHEASTERN QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...

* UNTIL 400 PM EDT

* AT 316 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM. THE STORM WAS NEAR NEWTOWN...MOVING NORTHEAST
  AT 25 MPH. THIS STORM IS CAPABLE OF PRODUCING ONE INCH DIAMETER
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. 

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KENNEDYVILLE AROUND 325 PM EDT...
  CRUMPTON AROUND 330 PM EDT...
  MILLINGTON AROUND 340 PM EDT...
  CECILTON AND MASSEY AROUND 345 PM EDT...
  SASSAFRAS AND DELANEY CORNER AROUND 350 PM EDT...
  WARWICK AND BOHEMIAS MILLS AROUND 355 PM 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 SEVERE
THUNDERSTORM. WHEN THUNDER ROARS...MOVE INDOORS! REMEMBER...IF YOU
CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

&&

LAT...LON 3930 7619 3932 7619 3938 7611 3938 7606
      3944 7600 3945 7602 3948 7600 3961 7578
      3945 7571 3930 7571 3929 7576 3925 7576
      3916 7614 3928 7622
TIME...MOT...LOC 1917Z 245DEG 23KT 3930 7607

$$

FORECASTER: HEAVENER

1 follow-up statement

518 
WWUS51 KPHI 151949
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
349 PM EDT TUE JUL 15 2014

MDC035-151959-
/O.CAN.KPHI.SV.W.0134.000000T0000Z-140715T2000Z/
QUEEN ANNE'S MD-
349 PM EDT TUE JUL 15 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL QUEEN ANNE'S
COUNTY IS CANCELLED...

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 3944 7599 3961 7578 3945 7571 3930 7571
      3929 7576 3925 7576 3924 7580 3926 7584
      3925 7588
TIME...MOT...LOC 1949Z 245DEG 23KT 3939 7583

$$

DEC003-MDC015-029-152000-
/O.CON.KPHI.SV.W.0134.000000T0000Z-140715T2000Z/
NEW CASTLE DE-CECIL MD-KENT MD-
349 PM EDT TUE JUL 15 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHEASTERN KENT...SOUTHEASTERN CECIL AND SOUTHWESTERN NEW
CASTLE COUNTIES...

AT 347 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR CECILTON...OR 16 MILES SOUTH OF NORTHEAST...MOVING
NORTHEAST AT 25 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WARWICK BY 355 PM EDT...
  MIDDLETOWN...BOHEMIAS MILLS AND 9 MILES SOUTHEAST OF CHESAPEAKE
  CITY BY 400 PM 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 3944 7599 3961 7578 3945 7571 3930 7571
      3929 7576 3925 7576 3924 7580 3926 7584
      3925 7588
TIME...MOT...LOC 1949Z 245DEG 23KT 3939 7583

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 3:00 PM EDT	Special Weather Statement	PHI	Kent	60 min
Jul 15, 3:42 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	63 min
Jul 15, 3:47 PM EDT	Special Weather Statement	PHI	Kent, Queen Anne's, Talbot	58 min
Jul 15, 4:15 PM EDT	Severe Thunderstorm Warning	PHI	Caroline, Queen Anne's, Talbot	60 min
Jul 15, 4:19 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Queen Anne's	56 min
Jul 15, 4:37 PM EDT	Areal Flood Advisory	PHI	Caroline, Cecil, Kent, Queen Anne's, Talbot	4 hr
Jul 15, 5:19 PM EDT	Special Weather Statement	PHI	Sussex	56 min
Jul 15, 6:34 PM EDT	Areal Flood Advisory	PHI	Kent, Sussex	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.