Alert archive / Maryland / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 30, NWS Philadelphia/Mount Holly

June 1, 2015Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 1, 2015, 6:53 PM EDT for Kent County, Queen Anne's County, Maryland; Kent County, New Castle County, Delaware. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 1, 2015, 6:53 PM EDT (22:53 UTC)
Expired
Jun 1, 2015, 7:30 PM EDT
In force
37 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 46 km from the middle of the area, began a volume at 22:56 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.9 hours before the alert went out and 51 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, Phillips Aaf/Abe, MD at 12:00Z on 2015-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 355 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, Phillips Aaf/Abe, MD at 12:00Z on 2015-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
355 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
779 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
102 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.

190 
WUUS51 KPHI 012253
SVRPHI
DEC001-003-MDC029-035-012330-
/O.NEW.KPHI.SV.W.0030.150601T2253Z-150601T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
653 PM EDT MON JUN 1 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

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

* UNTIL 730 PM EDT

* AT 652 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR HARTLY...OR 13 MILES WEST OF
  DOVER...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DOVER...SMYRNA...CAMDEN...CLAYTON...CHESWOLD...MILLINGTON...
  HARTLY...DOVER SPEEDWAY...WOODLAND BEACH...GREEN SPRING...DOVER
  BASE HOUSING...DELANEY CORNER...MASSEY...RISING SUN-LEBANON...
  WYOMING...KENTON...LITTLE CREEK...LEIPSIC...TEMPLEVILLE AND RODNEY
  VILLAGE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3932 7586 3934 7547 3931 7543 3925 7540
      3924 7541 3920 7540 3910 7540 3913 7575
      3914 7575 3913 7581
TIME...MOT...LOC 2252Z 263DEG 30KT 3923 7575 

$$
1 follow-up statement
951 
WWUS51 KPHI 012312
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
712 PM EDT MON JUN 1 2015

MDC029-035-012320-
/O.CAN.KPHI.SV.W.0030.000000T0000Z-150601T2330Z/
QUEEN ANNE'S MD-KENT MD-
712 PM EDT MON JUN 1 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN QUEEN ANNE'S AND
EAST CENTRAL KENT COUNTIES IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELLED.

LAT...LON 3934 7547 3931 7543 3925 7540 3924 7541
      3920 7540 3910 7540 3916 7565 3920 7570
      3921 7571 3933 7573
TIME...MOT...LOC 2310Z 263DEG 30KT 3925 7555 

$$

DEC001-003-012330-
/O.CON.KPHI.SV.W.0030.000000T0000Z-150601T2330Z/
KENT DE-NEW CASTLE DE-
712 PM EDT MON JUN 1 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR NORTHERN KENT AND SOUTH CENTRAL NEW CASTLE COUNTIES...

AT 710 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED OVER CHESWOLD...OR NEAR DOVER...MOVING
EAST AT 35 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY
LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 3934 7547 3931 7543 3925 7540 3924 7541
      3920 7540 3910 7540 3916 7565 3920 7570
      3921 7571 3933 7573
TIME...MOT...LOC 2310Z 263DEG 30KT 3925 7555 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 1, 3:13 AM EDTAreal Flood AdvisoryPHICecil, Kent3 hr
Jun 1, 4:20 AM EDTFlash Flood WatchPHICaroline, Cecil, Kent, Queen Anne's, Talbot26 hr
Jun 1, 5:35 PM EDTSevere Thunderstorm WarningPHICecil, Kent, Queen Anne's70 min
Jun 1, 5:56 PM EDTAreal Flood AdvisoryPHICecil, Kent, Queen Anne's6 hr
Jun 1, 6:29 PM EDTFlash Flood WarningPHICecil3 hr
Jun 1, 7:54 PM EDTSpecial Weather StatementPHICaroline111 min
Jun 1, 2:17 AM EDTSpecial Weather StatementPHINew Castle43 min
Jun 1, 4:32 PM EDTSevere Thunderstorm WarningPHINew Castle43 min
Jun 1, 4:35 PM EDTFlash Flood WarningPHINew Castle3 hr
Jun 1, 5:27 PM EDTAreal Flood AdvisoryPHINew Castle3 hr
Jun 1, 6:11 PM EDTAreal Flood AdvisoryPHIKent, New Castle6 hr

Nearby

Severe Thunderstorm Warnings in Maryland, 2015Severe Thunderstorm Warnings in Delaware, 2015Every severe thunderstorm warning in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.