Alert archive / Maryland / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 80, NWS Philadelphia/Mount Holly

June 30, 20154 counties in Maryland

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 30, 2015, 4:32 PM EDT for 4 counties in Maryland. It was in force for 43 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 30, 2015, 4:32 PM EDT (20:32 UTC)
Expired: Jun 30, 2015, 5:15 PM EDT
In force: 43 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

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

The radar

The Dover AFB radar (KDOX), 70 km from the middle of the area, began a volume at 20:35 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
Jun 30, 4:57 PM EDT	MARINE TSTM WIND 41	15 Ese Galesville, MD

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
Jun 30, 1:21 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.5 hours before the alert went out and 70 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: 600 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

965 
WUUS51 KPHI 302032
SVRPHI
MDC011-029-035-041-302115-
/O.NEW.KPHI.SV.W.0080.150630T2032Z-150630T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
432 PM EDT TUE JUN 30 2015

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN QUEEN ANNE'S COUNTY IN NORTHEASTERN MARYLAND...
  CENTRAL CAROLINE COUNTY IN EASTERN MARYLAND...
  SOUTHWESTERN KENT COUNTY IN NORTHEASTERN MARYLAND...
  TALBOT COUNTY IN EASTERN MARYLAND...

* UNTIL 515 PM EDT

* AT 432 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 TILGHMAN ISLAND...OR 9 MILES
  NORTHEAST OF PLUM POINT...AND MOVING NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EASTON...TALBOT...DENTON...CENTREVILLE...RIDGELY...ST. MICHAELS...
  OXFORD...QUEEN ANNE...JUMPTOWN...STARR...COPPERVILLE...SKIPTON...
  WYE MILLS...CHESTER...TILGHMAN ISLAND...OVERTON...GRIFFIN...
  MATTHEWS...GRASONVILLE AND CORDOVA.

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.

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.

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

&&

LAT...LON 3886 7626 3886 7625 3879 7620 3879 7619
      3897 7625 3891 7624 3884 7637 3885 7638
      3899 7628 3900 7617 3903 7624 3910 7619
      3889 7578 3866 7615 3876 7622 3872 7630
      3878 7629 3867 7634 3868 7635 3876 7638
TIME...MOT...LOC 2032Z 230DEG 37KT 3868 7635 

$$

HEAVENER

1 follow-up statement

704 
WWUS51 KPHI 302106
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
506 PM EDT TUE JUN 30 2015

MDC011-029-035-041-302115-
/O.CON.KPHI.SV.W.0080.000000T0000Z-150630T2115Z/
QUEEN ANNE'S MD-CAROLINE MD-KENT MD-TALBOT MD-
506 PM EDT TUE JUN 30 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR SOUTHWESTERN QUEEN ANNE'S...WEST CENTRAL CAROLINE...SOUTHWESTERN
KENT AND NORTH CENTRAL TALBOT COUNTIES...

AT 506 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 SKIPTON...OR 8 MILES NORTH OF
EASTON...MOVING NORTHEAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
CENTREVILLE...RIDGELY...QUEEN ANNE...STARR...COPPERVILLE...SKIPTON...
WYE MILLS...OVERTON...CORDOVA...GRASONVILLE...JUMPTOWN...QUEENSTOWN
AND HILLSBORO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE 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.

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM.  MOVE INDOORS
IMMEDIATELY. LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

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

&&

LAT...LON 3899 7628 3900 7617 3903 7623 3910 7619
      3893 7586 3880 7618 3887 7622 3897 7625
      3892 7624
TIME...MOT...LOC 2106Z 230DEG 37KT 3889 7602 

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:34 PM EDT	Special Weather Statement	PHI	Cecil	26 min
Jun 30, 2:41 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	49 min
Jun 30, 3:08 PM EDT	Areal Flood Advisory	PHI	Cecil, Kent	4 hr
Jun 30, 3:25 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	37 min
Jun 30, 3:54 PM EDT	Flash Flood Watch	PHI	Cecil	13 hr
Jun 30, 4:06 PM EDT	Special Weather Statement	PHI	Kent	39 min
Jun 30, 5:14 PM EDT	Special Weather Statement	PHI	Queen Anne's	31 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2015 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.