Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 14, 2010, 6:25 PM EDT for Burlington County, Hunterdon County, Mercer County, New Jersey; 4 counties in Pennsylvania. It was in force for 65 min. 1 report 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
- May 14, 2010, 6:25 PM EDT (22:25 UTC)
- Expired
- May 14, 2010, 7:30 PM EDT
- In force
- 65 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Burlington County, NJ, Hunterdon County, NJ, Mercer County, NJ, Bucks County, PA, Chester County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 63 km from the middle of the area, began a volume at 22:25 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 |
|---|---|---|---|
| May 14, 6:28 PM EDT | TSTM WND DMG | 3 N Fricks, PA | TREES DOWN ON WIRES IN HILLTOWN TOWNSHIP. |
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 |
|---|---|---|---|
| May 14, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.4 hours before the alert went out and 128 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 557 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
424 WUUS51 KPHI 142225 SVRPHI NJC005-019-021-PAC017-029-091-101-142330- /O.NEW.KPHI.SV.W.0020.100514T2225Z-100514T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 625 PM EDT FRI MAY 14 2010 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MERCER COUNTY IN CENTRAL NEW JERSEY... THIS INCLUDES THE CITY OF TRENTON... SOUTH CENTRAL HUNTERDON COUNTY IN NORTHWEST NEW JERSEY... BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... EXTREME NORTHEASTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA... MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHERN PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY... * UNTIL 730 PM EDT * AT 621 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR GREEN LANE...OR 19 MILES SOUTH OF ALLENTOWN...AND MOVING SOUTHEAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SOUDERTON AROUND 635 PM EDT... LANSDALE...HATFIELD AND FRICKS AROUND 640 PM EDT... CHALFONT AROUND 645 PM EDT... AMBLER AROUND 650 PM EDT... HATBORO...WILLOW GROVE...IVYLAND AND ABINGTON AROUND 700 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... DOPPLER RADAR HAS INDICATED SOME 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. THIS STORM HAS A HISTORY OF PRODUCING DESTRUCTIVE WINDS AND LARGE DAMAGING HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS! A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4035 7464 3996 7482 4019 7561 4051 7537 TIME...MOT...LOC 2225Z 296DEG 30KT 4030 7544 $$ HAYES
1 follow-up statement
103 WWUS51 KPHI 142256 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 656 PM EDT FRI MAY 14 2010 NJC005-019-021-PAC017-029-091-101-142330- /O.CON.KPHI.SV.W.0020.000000T0000Z-100514T2330Z/ HUNTERDON NJ-MERCER NJ-PHILADELPHIA PA-CHESTER PA-MONTGOMERY PA- BUCKS PA-BURLINGTON NJ- 656 PM EDT FRI MAY 14 2010 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR NORTHWESTERN BURLINGTON...BUCKS...MONTGOMERY...EXTREME NORTHEASTERN CHESTER...NORTHERN PHILADELPHIA...WESTERN MERCER AND SOUTH CENTRAL HUNTERDON COUNTIES... AT 654 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR HORSHAM...OR 13 MILES NORTH OF PHILADELPHIA...MOVING SOUTHEAST AT 35 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... BRYN ATHYN...CHURCHVILLE...RICHBORO AND ROCKLEDGE BY 705 PM EDT... FEASTERVILLE...NORTHEAST PHILADELPHIA AND VILLAGE SHIRES BY 710 PM EDT... BENSALEM...CORNWELLS HEIGHTS-EDDINGTON AND HULMEVILLE BY 715 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. && LAT...LON 4035 7464 3996 7482 4019 7561 4051 7537 TIME...MOT...LOC 2256Z 296DEG 30KT 4019 7514 $$ HAYES
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 4:18 PM EDT | Special Weather Statement | PHI | Warren | 57 min |
| May 14, 5:07 PM EDT | Special Weather Statement | PHI | Morris, Warren | 53 min |
| May 14, 5:53 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset, Warren | 67 min |
| May 14, 6:09 PM EDT | Special Weather Statement | PHI | Morris | 66 min |
| May 14, 6:11 PM EDT | Special Weather Statement | PHI | Warren | 64 min |
| May 14, 6:58 PM EDT | Special Weather Statement | PHI | Mercer, Monmouth, Ocean | 62 min |
| May 14, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer, Monmouth, Ocean | 56 min |
| May 14, 7:19 PM EDT | Special Marine Warning | PHI | 56 min | |
| May 14, 7:19 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Gloucester | 56 min |
| May 14, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Salem | 63 min |
| May 14, 7:33 PM EDT | Special Marine Warning | PHI | 87 min | |
| May 14, 7:48 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 57 min |
| May 14, 3:52 PM EDT | Special Weather Statement | PHI | Carbon, Monroe | 53 min |
| May 14, 4:26 PM EDT | Special Weather Statement | PHI | Carbon, Northampton | 64 min |
| May 14, 4:42 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| May 14, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Lehigh, Northampton | 56 min |
| May 14, 5:38 PM EDT | Tornado Warning | PHI | Berks, Lehigh | 37 min |
| May 14, 5:49 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 56 min |
| May 14, 6:35 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 55 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2010Severe Thunderstorm Warnings in New Jersey, 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.