Alert archive / Maryland / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 110, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 2011, 5:55 PM EDT for 4 counties in Maryland. It was in force for 65 min. 4 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 12, 2011, 5:55 PM EDT (21:55 UTC)
- Expired
- Jun 12, 2011, 7:00 PM EDT
- In force
- 65 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), 71 km from the middle of the area, began a volume at 21:55 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 12, 6:10 PM EDT | TSTM WND DMG | 2 Ne Starkey Corner, MD | TREES DOWN IN CHURCH HILL. |
| Jun 12, 6:10 PM EDT | TSTM WND GST 57 | 2 Ne Starkey Corner, MD | A 57 MPH THUNDERSTORM WIND GUST WAS MEASURED IN CHURCH HILL. |
| Jun 12, 6:10 PM EDT | HAIL 0.5 | 2 Ne Starkey Corner, MD | HAIL AROUND HALF INCH IN DIAMETER REPORTED IN CHURCH HILL. |
| Jun 12, 6:48 PM EDT | TSTM WND GST 65 | Ridgely, MD | THUNDERSTORM WIND GUSTS WERE ESTIMATED TO BE 60 TO 65 MPH IN RIDGELY. |
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 12, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.9 hours before the alert went out and 102 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
- 360 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 861 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
452
WUUS51 KPHI 122155
SVRPHI
MDC011-029-035-041-122300-
/O.NEW.KPHI.SV.W.0110.110612T2155Z-110612T2300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT SUN JUN 12 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN CAROLINE COUNTY IN EASTERN MARYLAND...
NORTHERN TALBOT COUNTY IN EASTERN MARYLAND...
KENT COUNTY IN NORTHEAST MARYLAND...
QUEEN ANNE'S COUNTY IN NORTHEAST MARYLAND...
THIS INCLUDES THE CITY OF CENTERVILLE...
* UNTIL 700 PM EDT
* AT 555 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 NEAR
CRUMPTON...AND MOVING SOUTH AT 20 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SUDLERSVILLE AROUND 605 PM EDT...
CHURCH HILL AROUND 615 PM EDT...
STARKEY CORNER AROUND 620 PM EDT...
HOPE AND CARVILLE AROUND 635 PM EDT...
OAKLAND AROUND 645 PM EDT...
JUMPTOWN AND GREENSBORO AROUND 650 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT SUNDAY
EVENING FOR NORTHEASTERN MARYLAND.
&&
LAT...LON 3896 7637 3905 7631 3900 7627 3898 7621
3900 7618 3903 7625 3910 7624 3915 7628
3932 7619 3936 7613 3938 7577 3891 7573
3886 7627 3887 7621 3894 7624 3890 7624
3893 7628 3887 7633 3885 7638 3885 7639
TIME...MOT...LOC 2154Z 357DEG 18KT 3925 7592
$$
IOVINO2 follow-up statements
848
WWUS51 KPHI 122230
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
630 PM EDT SUN JUN 12 2011
MDC011-029-035-041-122300-
/O.CON.KPHI.SV.W.0110.000000T0000Z-110612T2300Z/
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
630 PM EDT SUN JUN 12 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHEASTERN TALBOT...QUEEN ANNE'S...KENT AND NORTHERN CAROLINE
COUNTIES...
AT 627 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE
SIZE OF GOLF BALLS...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR BARCLAY...OR 12 MILES EAST OF
CENTERVILLE...MOVING SOUTH AT 25 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
HENDERSON BY 635 PM EDT...
GOLDSBORO BY 645 PM EDT...
OAKLAND AND 6 MILES EAST OF JUMPTOWN BY 650 PM EDT...
GREENSBORO AND RIDGELY BY 655 PM EDT...
8 MILES EAST OF HILLSBORO AND 9 MILES EAST OF QUEEN ANNE BY 700 PM
EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND.
&&
LAT...LON 3894 7637 3904 7632 3904 7631 3900 7627
3899 7620 3900 7618 3903 7625 3910 7624
3938 7577 3891 7573 3886 7625 3889 7621
3894 7624 3890 7624 3893 7628 3890 7633
3887 7633 3885 7638
TIME...MOT...LOC 2229Z 345DEG 20KT 3909 7584
$$
GORSE984
WWUS51 KPHI 122244
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
644 PM EDT SUN JUN 12 2011
MDC011-029-035-041-122300-
/O.CON.KPHI.SV.W.0110.000000T0000Z-110612T2300Z/
CAROLINE MD-KENT MD-QUEEN ANNE'S MD-TALBOT MD-
644 PM EDT SUN JUN 12 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR NORTHEASTERN TALBOT...SOUTHERN QUEEN ANNE'S...EXTREME
SOUTHWESTERN KENT AND NORTHERN CAROLINE COUNTIES...
AT 642 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF GOLF
BALLS...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR GREENSBORO...OR 14 MILES EAST OF CENTERVILLE...MOVING
SOUTH AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
8 MILES EAST OF HILLSBORO AND 9 MILES EAST OF QUEEN ANNE BY 650 PM
EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS IN PORTIONS OF
QUEEN ANNE'S COUNTY. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND
STAY AWAY FROM WINDOWS!
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...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT SUNDAY
EVENING FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND.
&&
LAT...LON 3894 7637 3904 7632 3904 7631 3900 7627
3899 7620 3900 7618 3903 7625 3915 7576
3891 7574 3886 7625 3889 7621 3894 7624
3890 7624 3893 7628 3890 7633 3887 7633
3885 7638
TIME...MOT...LOC 2243Z 352DEG 26KT 3898 7580
$$
GORSEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 9:59 PM EDT | Areal Flood Advisory | PHI | Cecil | 3 hr |
| Jun 11, 10:29 PM EDT | Special Weather Statement | PHI | Cecil | 61 min |
| Jun 11, 10:52 PM EDT | Special Weather Statement | PHI | Cecil | 68 min |
| Jun 12, 3:35 PM EDT | Special Weather Statement | PHI | Cecil | 55 min |
| Jun 12, 3:51 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 54 min |
| Jun 12, 4:55 PM EDT | Special Weather Statement | PHI | Kent, Queen Anne's | 65 min |
| Jun 12, 5:08 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent, Queen Anne's | 52 min |
| Jun 12, 6:50 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Talbot | 55 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2011Every severe thunderstorm warning in 2011
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.