Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 4, 2012, 12:56 PM EDT for Kent County, Queen Anne's County, Talbot County, Maryland. It was in force for 15 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
- May 4, 2012, 12:56 PM EDT (16:56 UTC)
- Expired
- May 4, 2012, 1:11 PM EDT
- In force
- 15 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties 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 16:59 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 4.9 hours before the alert went out and 101 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
- 891 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 905 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
290
WUUS51 KPHI 041656
SVRPHI
MDC029-035-041-041745-
/O.NEW.KPHI.SV.W.0005.120504T1656Z-120504T1745Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1256 PM EDT FRI MAY 4 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN TALBOT COUNTY IN EASTERN MARYLAND...
WESTERN KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 145 PM EDT
* AT 1253 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 15
MILES WEST OF STEVENSVILLE MOVING NORTHEAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
STEVENSVILLE AND CHESTER AROUND 120 PM EDT...
6 MILES NORTHWEST OF GRASONVILLE AROUND 125 PM EDT...
OVERTON AROUND 130 PM EDT...
6 MILES SOUTHEAST OF ROCK HALL AROUND 135 PM EDT...
CENTREVILLE AND CENTERVILLE AROUND 140 PM EDT...
OLD TOWN...STARKEY CORNER AND 6 MILES NORTHWEST OF CARVILLE AROUND
145 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE 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...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES GREATEST KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
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 3904 7630 3899 7627 3900 7618 3903 7625
3917 7629 3929 7620 3937 7604 3903 7588
3890 7594 3882 7620 3894 7624 3891 7624
3887 7632 3884 7629 3887 7625 3882 7622
3879 7632 3886 7631 3883 7637 3886 7638
TIME...MOT...LOC 1656Z 244DEG 29KT 3893 7655
$$
PO1 follow-up statement
565
WWUS51 KPHI 041711
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
111 PM EDT FRI MAY 4 2012
MDC029-035-041-041720-
/O.CAN.KPHI.SV.W.0005.000000T0000Z-120504T1745Z/
KENT MD-TALBOT MD-QUEEN ANNE'S MD-
111 PM EDT FRI MAY 4 2012
...THE SEVERE THUNDERSTORM WARNING FOR QUEEN ANNE'S...NORTHERN TALBOT
AND WESTERN KENT COUNTIES IS CANCELLED...
THE THUNDERSTORM THAT PROMPTED THE PREVIOUS WARNING HAS WEAKENED.
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
LAT...LON 3904 7630 3899 7627 3900 7618 3903 7625
3917 7629 3929 7620 3937 7604 3903 7588
3890 7594 3882 7620 3894 7624 3891 7624
3887 7632 3884 7629 3887 7625 3882 7622
3879 7632 3886 7631 3883 7637 3886 7638
TIME...MOT...LOC 1710Z 244DEG 29KT 3898 7642
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 1:02 AM EDT | Special Weather Statement | PHI | Caroline, Queen Anne's, Talbot | 58 min |
| May 4, 1:34 PM EDT | Special Weather Statement | PHI | Talbot | 26 min |
| May 4, 2:07 PM EDT | Special Weather Statement | PHI | Caroline | 38 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 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.