Alert archive / Maryland / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS Philadelphia/Mount Holly

June 22, 2012Cecil County, Maryland; Salem County, New Jersey; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2012, 7:06 PM EDT for Cecil County, Maryland; Salem County, New Jersey; New Castle County, Delaware. It was in force for 54 min. 10 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: Jun 22, 2012, 7:06 PM EDT (23:06 UTC)
Expired: Jun 22, 2012, 8:00 PM EDT
In force: 54 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

Counties New Castle County, DE, Cecil County, MD, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 78 km from the middle of the area, began a volume at 23:07 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 22, 7:29 PM EDT	HAIL 0.75	Bear, DE
Jun 22, 7:35 PM EDT	TSTM WND DMG	Delaware City, DE	TREES AND UTILITY POLES DOWN ALONG ROUTE 9.
Jun 22, 7:35 PM EDT	TSTM WND DMG	Elkton, MD	TREES AND WIRES DOWN COUNTY WIDE
Jun 22, 7:36 PM EDT	MARINE TSTM WIND 47	Delaware City Nos, DE	41 KT WIND GUST AT DELAWARE CITY
Jun 22, 7:37 PM EDT	TSTM WND DMG	Rolling Meadows, DE	5 POLES DOWN
Jun 22, 7:40 PM EDT	TSTM WND DMG	Delaware City, DE	BUILDINGS DAMAGED. TREES AND WIRES DOWN.
Jun 22, 7:42 PM EDT	TSTM WND GST 62	Delaware City, DE
Jun 22, 7:45 PM EDT	TSTM WND DMG	Bear, DE	NUMEROUS TREES AND WIRES DOWN
Jun 22, 7:45 PM EDT	TSTM WND DMG	Red Lion, DE	TREES DOWN AT THE INTERSECTION OF RTE 72 AND 71.
Jun 22, 7:49 PM EDT	TSTM WND DMG	1 Nw Delaware City, DE	ROUTE 72 TREES DOWN

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 22, 2:12 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.1 hours before the alert went out and 41 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: 1129 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 1361 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

807 
WUUS51 KPHI 222306
SVRPHI
DEC003-MDC015-NJC033-230000-
/O.NEW.KPHI.SV.W.0046.120622T2306Z-120623T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
706 PM EDT FRI JUN 22 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CECIL COUNTY IN NORTHEAST MARYLAND...
  THIS INCLUDES THE CITY OF ELKTON...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF MIDDLETOWN...
  SOUTHWESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 800 PM EDT

* AT 704 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR
  BRANTWOOD...OR NEAR ELKTON...AND MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRANTWOOD AROUND 715 PM EDT...
  GLASGOW AND BOHEMIAS MILLS AROUND 720 PM EDT...
  MOUNT PLEASANT AND MIDDLETOWN AROUND 730 PM EDT...
  SAINT GEORGES AROUND 735 PM EDT...
  DELAWARE CITY AROUND 740 PM EDT...
  PORT PENN AROUND 745 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...HEAVY RAIN WILL OCCUR
WITH THESE STORMS AND CAUSE LOW-LYING AND POOR DRAINAGE FLOODING.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3970 7596 3963 7560 3960 7560 3963 7558
      3957 7526 3946 7537 3945 7541 3942 7540
      3939 7544 3943 7547 3946 7555 3950 7556
      3948 7558 3938 7551 3935 7554 3947 7601
      3952 7599 3954 7607
TIME...MOT...LOC 2306Z 285DEG 20KT 3956 7586

$$

NIERENBERG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 6:13 PM EDT	Special Weather Statement	PHI	Cecil	62 min
Jun 22, 6:13 PM EDT	Severe Thunderstorm Warning	PHI	Cecil	62 min
Jun 22, 6:16 PM EDT	Special Weather Statement	PHI	Cecil	119 min
Jun 22, 7:31 PM EDT	Special Weather Statement	PHI	Kent	59 min
Jun 22, 7:42 PM EDT	Flash Flood Warning	PHI	Cecil	93 min
Jun 22, 7:57 PM EDT	Severe Thunderstorm Warning	PHI	Cecil, Kent	69 min
Jun 22, 10:12 AM EDT	Special Weather Statement	PHI	Ocean	33 min
Jun 22, 11:57 AM EDT	Special Weather Statement	PHI	Ocean	63 min
Jun 22, 12:15 PM EDT	Special Weather Statement	PHI	Ocean	60 min
Jun 22, 12:18 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	42 min
Jun 22, 12:21 PM EDT	Special Marine Warning	PHI		84 min
Jun 22, 12:23 PM EDT	Special Marine Warning	PHI		97 min
Jun 22, 12:44 PM EDT	Areal Flood Advisory	PHI	Ocean	2 hr
Jun 22, 12:53 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	52 min
Jun 22, 12:59 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	61 min
Jun 22, 1:10 PM EDT	Flash Flood Warning	PHI	Ocean	6 hr
Jun 22, 1:37 PM EDT	Special Weather Statement	PHI	Burlington	83 min
Jun 22, 1:42 PM EDT	Special Marine Warning	PHI		63 min
Jun 22, 1:46 PM EDT	Severe Thunderstorm Warning	PHI	Ocean	59 min
Jun 22, 1:49 PM EDT	Special Weather Statement	PHI	Ocean	56 min
Jun 22, 1:59 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Monmouth, Ocean	73 min
Jun 22, 2:04 PM EDT	Special Marine Warning	PHI		56 min
Jun 22, 2:31 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Monmouth, Ocean	119 min
Jun 22, 2:34 PM EDT	Special Weather Statement	PHI	Atlantic	56 min
Jun 22, 2:39 PM EDT	Special Marine Warning	PHI		96 min
Jun 22, 2:42 PM EDT	Special Weather Statement	PHI	Burlington, Ocean	63 min
Jun 22, 2:46 PM EDT	Special Weather Statement	PHI	Monmouth	59 min
Jun 22, 2:51 PM EDT	Special Marine Warning	PHI		54 min
Jun 22, 3:16 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Camden, Ocean	59 min
Jun 22, 3:28 PM EDT	Special Marine Warning	PHI		62 min
Jun 22, 3:40 PM EDT	Special Marine Warning	PHI		65 min
Jun 22, 3:43 PM EDT	Areal Flood Advisory	PHI	Atlantic	2 hr
Jun 22, 3:55 PM EDT	Severe Thunderstorm Warning	PHI	Morris, Sussex	65 min
Jun 22, 4:00 PM EDT	Flash Flood Warning	PHI	Burlington	43 min
Jun 22, 4:05 PM EDT	Special Marine Warning	PHI		85 min
Jun 22, 4:09 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Warren	66 min
Jun 22, 4:11 PM EDT	Severe Thunderstorm Warning	PHI	Cape May, Cumberland	44 min
Jun 22, 4:15 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Ocean	60 min
Jun 22, 4:26 PM EDT	Special Marine Warning	PHI		94 min
Jun 22, 4:27 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Camden, Ocean	2 hr
Jun 22, 4:49 PM EDT	Special Weather Statement	PHI	Cape May	56 min
Jun 22, 5:00 PM EDT	Severe Thunderstorm Warning	PHI	Hunterdon, Morris, Somerset, Sussex, Warren	45 min
Jun 22, 5:05 PM EDT	Special Weather Statement	PHI	Atlantic, Ocean	55 min
Jun 22, 5:16 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Ocean	59 min
Jun 22, 5:23 PM EDT	Special Marine Warning	PHI		97 min
Jun 22, 5:45 PM EDT	Severe Thunderstorm Warning	PHI	Middlesex, Monmouth, Morris, Somerset	42 min
Jun 22, 5:48 PM EDT	Special Weather Statement	PHI	Mercer	57 min
Jun 22, 5:54 PM EDT	Special Marine Warning	PHI		96 min
Jun 22, 7:02 PM EDT	Areal Flood Advisory	PHI	Burlington, Camden, Gloucester	102 min
Jun 22, 7:04 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	56 min
Jun 22, 7:30 PM EDT	Special Marine Warning	PHI		60 min
Jun 22, 7:52 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Mercer, Monmouth	73 min
Jun 22, 1:01 PM EDT	Special Weather Statement	PHI	Sussex	29 min
Jun 22, 1:32 PM EDT	Areal Flood Advisory	PHI	Sussex	118 min
Jun 22, 2:09 PM EDT	Special Weather Statement	PHI	Sussex	66 min
Jun 22, 3:15 PM EDT	Special Weather Statement	PHI	Sussex	60 min
Jun 22, 3:30 PM EDT	Areal Flood Advisory	PHI	Sussex	2 hr
Jun 22, 3:38 PM EDT	Special Weather Statement	PHI	Sussex	67 min
Jun 22, 4:29 PM EDT	Special Weather Statement	PHI	Kent, Sussex	61 min
Jun 22, 5:33 PM EDT	Special Weather Statement	PHI	Sussex	57 min
Jun 22, 5:53 PM EDT	Areal Flood Advisory	PHI	Sussex	50 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2012 Severe Thunderstorm Warnings in New Jersey, 2012 Severe Thunderstorm Warnings in Delaware, 2012 Every severe thunderstorm warning in 2012

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.