Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 56, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 29, 2012, 5:23 AM EDT for 5 counties in Maryland; Kent County, New Castle County, Delaware. It was in force for 67 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 29, 2012, 5:23 AM EDT (09:23 UTC)
- Expired
- Jun 29, 2012, 6:30 AM EDT
- In force
- 67 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD
The radar
The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 09:23 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.
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 29, 4:34 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 9.4 hours before the alert went out and 106 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2494 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 317 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
639
WUUS51 KPHI 290923
SVRPHI
DEC001-003-MDC011-015-029-035-041-291030-
/O.NEW.KPHI.SV.W.0056.120629T0923Z-120629T1030Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
523 AM EDT FRI JUN 29 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN KENT COUNTY IN CENTRAL DELAWARE...
NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHERN TALBOT COUNTY IN EASTERN MARYLAND...
SOUTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
SOUTHWESTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
* UNTIL 630 AM EDT
* AT 519 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED 14 MILES WEST OF
NEWTOWN...OR 13 MILES NORTHEAST OF BALTIMORE...AND MOVING SOUTHEAST
AT 50 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
NEWTOWN AROUND 535 AM EDT...
LANGFORD AROUND 540 AM EDT...
OLD TOWN AND CHESTERTOWN AROUND 545 AM EDT...
STARKEY CORNER AND CHURCH HILL AROUND 550 AM EDT...
HOPE AND CARVILLE AROUND 555 AM EDT...
OAKLAND AND GOLDSBORO AROUND 605 AM 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.
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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM EDT FRIDAY
MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEAST PENNSYLVANIA.
&&
LAT...LON 3904 7633 3899 7627 3900 7618 3903 7625
3917 7629 3932 7619 3939 7605 3946 7602
3934 7553 3883 7569 3882 7620 3885 7623
3882 7622 3881 7632 3882 7632 3883 7632
3886 7622 3893 7623 3894 7624 3884 7636
TIME...MOT...LOC 0923Z 311DEG 44KT 3934 7634
$$
TFG1 follow-up statement
259
WWUS51 KPHI 291014
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
614 AM EDT FRI JUN 29 2012
DEC003-MDC015-029-291024-
/O.CAN.KPHI.SV.W.0056.000000T0000Z-120629T1030Z/
NEW CASTLE DE-CECIL MD-KENT MD-
614 AM EDT FRI JUN 29 2012
...THE SEVERE THUNDERSTORM WARNING FOR KENT...SOUTHEASTERN CECIL AND
SOUTHWESTERN NEW CASTLE COUNTIES IS CANCELLED...
THE STORM IS SOUTH OF THE AREA.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM EDT FRIDAY
MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEAST PENNSYLVANIA.
LAT...LON 3903 7632 3899 7627 3898 7620 3904 7619
3906 7605 3917 7581 3929 7566 3934 7553
3883 7569 3882 7632 3883 7632 3885 7626
3883 7624 3884 7621 3893 7623 3894 7624
3889 7630 3890 7632 3885 7635 3885 7636
TIME...MOT...LOC 1014Z 311DEG 44KT 3901 7577
$$
DEC001-MDC011-035-041-291030-
/O.CON.KPHI.SV.W.0056.000000T0000Z-120629T1030Z/
KENT DE-TALBOT MD-CAROLINE MD-QUEEN ANNE'S MD-
614 AM EDT FRI JUN 29 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM EDT
FOR SOUTHERN QUEEN ANNE'S...NORTHERN CAROLINE...NORTHERN TALBOT AND
WESTERN KENT COUNTIES...
AT 610 AM 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 GOLDSBORO...OR 13 MILES EAST OF CENTERVILLE...MOVING
SOUTHEAST AT 50 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM EDT FRIDAY
MORNING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN
NEW JERSEY AND SOUTHEAST PENNSYLVANIA.
&&
LAT...LON 3903 7632 3899 7627 3898 7620 3904 7619
3906 7605 3917 7581 3929 7566 3934 7553
3883 7569 3882 7632 3883 7632 3885 7626
3883 7624 3884 7621 3893 7623 3894 7624
3889 7630 3890 7632 3885 7635 3885 7636
TIME...MOT...LOC 1014Z 311DEG 44KT 3901 7577
$$
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 4:46 AM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2012Severe Thunderstorm Warnings in Delaware, 2012Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.