Alert archive / Maryland / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 62, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2010, 5:41 PM EDT for 4 states. It was in force for 49 min. 6 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, 2010, 5:41 PM EDT (21:41 UTC)
- Expired
- Jun 22, 2010, 6:30 PM EDT
- In force
- 49 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Cecil County, MD, Salem County, NJ, Chester County, PA
The radar
The Dover AFB radar (KDOX), 89 km from the middle of the area, began a volume at 21:42 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, 6:10 PM EDT | HAIL 0.88 | 3 Nw Kemblesville, PA | NICKEL AND SOME QUARTER SIZE HAIL REPORTED IN NEW LONDON. |
| Jun 22, 6:15 PM EDT | HAIL 0.25 | Kemblesville, PA | PEA SIZE HAIL REPORTED IN KEMBLESVILLE. |
| Jun 22, 6:28 PM EDT | TSTM WND DMG | Elkton, MD | NUMEROUS REPORTS ACROSS NORTHEASTERN CECIL COUNTY OF TREES, WIRES, AND A POWER POLE DOWN. TIME OF DAMAGE ESTIMATED BY RADAR. |
| Jun 22, 6:33 PM EDT | HAIL 1 | Newark, DE | QUARTER SIZE HAIL REPORTED IN NEWARK. |
| Jun 22, 6:35 PM EDT | TSTM WND DMG | Elkton, MD | NUMEROUS REPORTS ACROSS NORTHEASTERN CECIL COUNTY OF TREES, WIRES, AND A POWER POLE DOWN. |
| Jun 22, 6:40 PM EDT | TSTM WND GST 62 | Bear, DE | MEASURED WIND GUST OF 62MPH AND QUARTER SIZE HAIL REPORTED IN BEAR. |
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, 5:06 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.7 hours before the alert went out and 39 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
- 20 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1411 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
671
WUUS51 KPHI 222141
SVRPHI
DEC003-MDC015-NJC033-PAC029-222230-
/O.NEW.KPHI.SV.W.0062.100622T2141Z-100622T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
541 PM EDT TUE JUN 22 2010
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN CECIL COUNTY IN NORTHEAST MARYLAND...
CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
THIS INCLUDES THE CITY OF NEWARK...
SOUTHWESTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
WESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 630 PM EDT
* AT 539 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
MOUNT VERNON...OR 19 MILES SOUTHEAST OF LANCASTER...AND MOVING
SOUTHEAST AT 45 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLEN
ROY...OXFORD...CALVERT...LOMBARD...ZION...BLAKE...PLEASANT HILL...
FAIR HILL...KEMBLESVILLE...ANDORA...CHERRY HILL...LADENBERG...
APPLETON...GLEN WESTOVER...BARKSDALE...NORTH STAR...PIKE CREEK...
GLASGOW...STANTON...BEAR...NEWPORT...WILMINGTON MANOR...SAINT
GEORGES...NEW CASTLE...DELAWARE CITY...PENNSVILLE...PORT PENN...
WOODSTOWN AND SALEM
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 900 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.
&&
LAT...LON 3978 7607 3986 7602 3966 7531 3944 7546
3948 7556 3950 7557 3952 7554 3956 7553
3958 7554 3958 7556 3951 7557 3950 7557
3949 7558 3973 7612 3975 7612
TIME...MOT...LOC 2141Z 296DEG 37KT 3981 7607
$$2 follow-up statements
993
WWUS51 KPHI 222155
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
555 PM EDT TUE JUN 22 2010
DEC003-MDC015-NJC033-PAC029-222230-
/O.CON.KPHI.SV.W.0062.000000T0000Z-100622T2230Z/
CECIL MD-SALEM NJ-CHESTER PA-NEW CASTLE DE-
555 PM EDT TUE JUN 22 2010
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR CENTRAL NEW CASTLE...SOUTHWESTERN CHESTER...WESTERN SALEM AND
NORTHEASTERN CECIL COUNTIES...
AT 552 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 NEAR GLEN ROY...OR 19 MILES NORTHWEST OF NEWARK...MOVING
SOUTHEAST AT 25 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOUNT
VERNON...OXFORD...CALVERT...LOMBARD...ZION...BLAKE...PLEASANT HILL...
FAIR HILL...KEMBLESVILLE...ANDORA...LADENBERG...CHERRY HILL...
APPLETON...GLEN WESTOVER...BARKSDALE...SAINT GEORGES...PORT PENN...
NORTH STAR...GLASGOW...BEAR...WOODSTOWN...SALEM...PENNSVILLE...
ELKTON...WILMINGTON MANOR...STANTON...PIKE CREEK...NEWPORT...NEW
CASTLE...ELSMERE...DELAWARE CITY AND BROOKSIDE
THE WARNING FOR SALEM COUNTY NEW JERSEY IS THE LEAST LIKELY PORTION
TO VERIFY DUE TO A SOMEWHAT SLOWED MOTION SINCE THE WARNING ISSUANCE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A
TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.
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 900 PM EDT
TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND
SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA.
&&
LAT...LON 3978 7607 3986 7602 3966 7531 3944 7546
3948 7556 3950 7557 3952 7554 3956 7553
3958 7554 3958 7556 3951 7557 3950 7557
3949 7558 3973 7612 3975 7612
TIME...MOT...LOC 2153Z 302DEG 22KT 3980 7607
$$
DRAG200 WWUS51 KPHI 222220 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 620 PM EDT TUE JUN 22 2010 NJC033-222229- /O.CAN.KPHI.SV.W.0062.000000T0000Z-100622T2230Z/ SALEM NJ- 620 PM EDT TUE JUN 22 2010 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SALEM COUNTY IS CANCELLED... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA. LAT...LON 3973 7562 3956 7572 3969 7601 3982 7594 TIME...MOT...LOC 2219Z 294DEG 22KT 3970 7587 $$ DEC003-MDC015-PAC029-222230- /O.CON.KPHI.SV.W.0062.000000T0000Z-100622T2230Z/ CECIL MD-CHESTER PA-NEW CASTLE DE- 620 PM EDT TUE JUN 22 2010 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR WEST CENTRAL NEW CASTLE...SOUTH CENTRAL CHESTER AND NORTHEASTERN CECIL COUNTIES... AT 617 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR FAIR HILL...OR 7 MILES WEST OF NEWARK...MOVING SOUTHEAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO KEMBLESVILLE...ANDORA...CHERRY HILL...APPLETON...GLEN WESTOVER... BARKSDALE...GLASGOW...STANTON...PIKE CREEK AND BROOKSIDE PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM. WHILE NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM. IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT TUESDAY EVENING FOR NORTHERN DELAWARE AND NORTHEAST MARYLAND AND SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA. && LAT...LON 3973 7562 3956 7572 3969 7601 3982 7594 TIME...MOT...LOC 2219Z 294DEG 22KT 3970 7587 $$ DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 6:29 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 46 min |
| Jun 22, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Cecil, Kent | 48 min |
| Jun 22, 7:48 PM EDT | Special Weather Statement | PHI | Kent | 42 min |
| Jun 22, 4:38 AM EDT | Excessive Heat Warning | PHI | Delaware, Philadelphia | 60 hr |
| Jun 22, 3:37 PM EDT | Special Weather Statement | PHI | Carbon | 38 min |
| Jun 22, 4:15 PM EDT | Special Weather Statement | PHI | Berks | 60 min |
| Jun 22, 4:23 PM EDT | Special Weather Statement | PHI | Berks | 67 min |
| Jun 22, 4:38 PM EDT | Special Weather Statement | PHI | Chester | 52 min |
| Jun 22, 4:56 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 34 min |
| Jun 22, 5:00 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more | 60 min |
| Jun 22, 5:15 PM EDT | Special Weather Statement | PHI | Berks, Chester, Delaware, Montgomery | 60 min |
| Jun 22, 5:29 PM EDT | Special Weather Statement | PHI | Berks, Chester, Delaware, Montgomery | 46 min |
| Jun 22, 6:50 PM EDT | Special Weather Statement | PHI | Bucks, Delaware, Philadelphia | 55 min |
| Jun 22, 6:31 PM EDT | Special Marine Warning | PHI | 44 min | |
| Jun 22, 7:12 PM EDT | Special Marine Warning | PHI | 48 min | |
| Jun 22, 7:15 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 45 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2010Severe Thunderstorm Warnings in Pennsylvania, 2010Severe Thunderstorm Warnings in Delaware, 2010Every severe thunderstorm warning in 2010
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.