Alert archive / Maryland / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 134, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2012, 4:10 PM EDT for Cecil County, Maryland. It was in force for 65 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
- Jul 28, 2012, 4:10 PM EDT (20:10 UTC)
- Expired
- Jul 28, 2012, 5:15 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 90 km from the middle of the area, began a volume at 20:09 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 |
|---|---|---|---|
| Jul 28, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.2 hours before the alert went out and 136 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
- 552 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1087 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
361
WUUS51 KPHI 282010
SVRPHI
MDC015-282115-
/O.NEW.KPHI.SV.W.0134.120728T2010Z-120728T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
410 PM EDT SAT JUL 28 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CECIL COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF ELKTON...
* UNTIL 515 PM EDT
* AT 406 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 9 MILES
SOUTHWEST OF CHARLESTOWN...OR 17 MILES SOUTHWEST OF ELKTON...AND
MOVING EAST AT 15 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
CHARLESTOWN AROUND 505 PM EDT...
HOLLYWOOD BEACH...CAYOTS...7 MILES SOUTH OF NORTH EAST AND 8 MILES
NORTHWEST OF CECILTON AROUND 515 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.
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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3968 7582 3942 7578 3937 7599 3938 7605
3940 7605 3943 7600 3946 7602 3952 7599
3954 7603 3954 7606 3956 7610 3958 7608
3959 7610
TIME...MOT...LOC 2010Z 257DEG 6KT 3948 7608
$$
HAYES3 follow-up statements
726
WWUS51 KPHI 282028
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
428 PM EDT SAT JUL 28 2012
MDC015-282115-
/O.CON.KPHI.SV.W.0134.000000T0000Z-120728T2115Z/
CECIL MD-
428 PM EDT SAT JUL 28 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CECIL COUNTY...
AT 427 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED 6 MILES SOUTH OF PERRYVILLE...OR 14 MILES SOUTHWEST OF
ELKTON...MOVING EAST AT 15 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
CHARLESTOWN BY 505 PM EDT...
HOLLYWOOD BEACH...CAYOTS...7 MILES SOUTH OF NORTH EAST AND 7 MILES
WEST OF CHESAPEAKE CITY BY 515 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3968 7582 3942 7578 3937 7599 3938 7605
3940 7605 3943 7600 3946 7602 3952 7599
3954 7603 3954 7606 3956 7610 3958 7608
3959 7610
TIME...MOT...LOC 2028Z 257DEG 6KT 3949 7604
$$
HAYES366
WWUS51 KPHI 282052
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
452 PM EDT SAT JUL 28 2012
MDC015-282115-
/O.CON.KPHI.SV.W.0134.000000T0000Z-120728T2115Z/
CECIL MD-
452 PM EDT SAT JUL 28 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR CECIL COUNTY...
AT 449 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR HOLLYWOOD BEACH...OR 11 MILES SOUTHWEST
OF ELKTON...MOVING EAST AT 5 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
CHARLESTOWN BY 500 PM EDT...
HOLLYWOOD BEACH...CAYOTS...6 MILES SOUTH OF NORTH EAST AND 7 MILES
WEST OF CHESAPEAKE CITY BY 515 PM EDT...
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 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3968 7582 3942 7578 3941 7588 3937 7599
3938 7605 3940 7605 3943 7600 3946 7602
3952 7599 3955 7607 3956 7610 3958 7608
3959 7610
TIME...MOT...LOC 2053Z 257DEG 6KT 3950 7598
$$
HAYES352
WWUS51 KPHI 282111
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
511 PM EDT SAT JUL 28 2012
MDC015-282121-
/O.EXP.KPHI.SV.W.0134.000000T0000Z-120728T2115Z/
CECIL MD-
511 PM EDT SAT JUL 28 2012
...THE SEVERE THUNDERSTORM WARNING FOR CECIL COUNTY WILL EXPIRE AT
515 PM EDT...
PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND
NEW JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 3968 7582 3942 7578 3941 7588 3937 7599
3938 7605 3940 7605 3943 7600 3946 7602
3952 7599 3955 7607 3956 7610 3958 7608
3959 7610
TIME...MOT...LOC 2111Z 257DEG 6KT 3951 7594
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 3:12 PM EDT | Special Weather Statement | PHI | Cecil | 63 min |
| Jul 28, 4:24 PM EDT | Areal Flood Advisory | PHI | Cecil | 95 min |
| Jul 28, 5:20 PM EDT | Special Weather Statement | PHI | Cecil | 55 min |
| Jul 28, 6:09 PM EDT | Special Weather Statement | PHI | Queen Anne's, Talbot | 66 min |
| Jul 28, 6:41 PM EDT | Severe Thunderstorm Warning | PHI | Queen Anne's, Talbot | 64 min |
| Jul 28, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 53 min |
| Jul 28, 7:57 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 48 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.