Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 37, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 31, 2008, 10:09 PM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 66 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 31, 2008, 10:09 PM EDT (02:09 UTC)
- Expired
- May 31, 2008, 11:15 PM EDT
- In force
- 66 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 69 km from the middle of the area, began a volume at 02:08 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
Brookhaven, NY (KOKX), launched 00:00Z, 2.2 hours before the alert went out and 201 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
- 88 J/kg
- Mixed-layer CIN
- -175 J/kg
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 010209 SVRPHI PAC017-091-010315- /O.NEW.KPHI.SV.W.0037.080601T0209Z-080601T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1009 PM EDT SAT MAY 31 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHEASTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 1115 PM EDT * AT 1004 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR PERKASIE...OR ABOUT 19 MILES SOUTHEAST OF ALLENTOWN...AND MOVING SOUTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CHALFONT AND 7 MILES SOUTHWEST OF GARDENVILLE BY 1015 PM... DOYLESTOWN BY 1020 PM... RICHBORO AND IVYLAND BY 1030 PM... FEASTERVILLE AND NEWTOWN BY 1035 PM... LANGHORNE AND WOODSIDE BY 1040 PM... LAT...LON 4013 7502 4038 7556 4047 7517 4019 7476 TIME...MOT...LOC 0209Z 302DEG 35KT 4033 7526 $$ RNS
3 follow-up statements
000 WWUS51 KPHI 010214 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1015 PM EDT SAT MAY 31 2008 PAC017-091-010315- /O.CON.KPHI.SV.W.0037.000000T0000Z-080601T0315Z/ MONTGOMERY PA-BUCKS PA- 1015 PM EDT SAT MAY 31 2008 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR BUCKS AND NORTHEASTERN MONTGOMERY COUNTIES... AT 1013 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR FRICKS...OR 21 MILES NORTH OF PHILADELPHIA...MOVING SOUTHEAST AT 40 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... DOYLESTOWN BY 1020 PM EDT... RICHBORO...IVYLAND...WARMINSTER HEIGHTS AND HATBORO BY 1030 PM EDT... CHURCHVILLE...VILLAGE SHIRES...FEASTERVILLE AND NEWTOWN BY 1035 PM EDT... PENNDEL BY 1040 PM EDT... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. LAT...LON 4013 7502 4038 7556 4047 7517 4019 7476 TIME...MOT...LOC 0215Z 302DEG 35KT 4030 7520 $$ RNS
000 WWUS51 KPHI 010245 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1045 PM EDT SAT MAY 31 2008 PAC017-091-010315- /O.CON.KPHI.SV.W.0037.000000T0000Z-080601T0315Z/ MONTGOMERY PA-BUCKS PA- 1045 PM EDT SAT MAY 31 2008 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR BUCKS AND NORTHEASTERN MONTGOMERY COUNTIES... AT 1040 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SILVERDALE...OR 22 MILES SOUTH OF BETHLEHEM...MOVING SOUTHEAST AT 38 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... NEW BRITAIN AND DOYLESTOWN BY 1050 PM EDT... IVYLAND...WARMINSTER HEIGHTS AND HATBORO BY 1100 PM EDT... CHURCHVILLE...RICHBORO AND NEWTOWN GRANT BY 1105 PM EDT... VILLAGE SHIRES AND NEWTOWN BY 1110 PM EDT... 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. LAT...LON 4013 7502 4038 7556 4047 7517 4019 7476 TIME...MOT...LOC 0245Z 299DEG 33KT 4030 7521 $$ RNS
000
WWUS51 KPHI 010258
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1058 PM EDT SAT MAY 31 2008
PAC017-091-010315-
/O.CON.KPHI.SV.W.0037.000000T0000Z-080601T0315Z/
MONTGOMERY PA-BUCKS PA-
1058 PM EDT SAT MAY 31 2008
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT
FOR CENTRAL BUCKS AND EAST CENTRAL MONTGOMERY COUNTIES...
AT 1054 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING PENNY SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.
THIS STORM WAS LOCATED NEAR BRITTANY FARMS-HIGHLANDS...OR 19 MILES
NORTH OF PHILADELPHIA...MOVING SOUTHEAST AT 34 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
IVYLAND...WARMINSTER HEIGHTS AND HATBORO BY 1105 PM EDT...
RICHBORO AND NEWTOWN GRANT BY 1110 PM EDT...
CHURCHVILLE...VILLAGE SHIRES...FEASTERVILLE AND LANGHORNE BY 1115
PM EDT...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
LAT...LON 4021 7480 4015 7493 4013 7502 4025 7528
4033 7507
TIME...MOT...LOC 0258Z 304DEG 29KT 4026 7514
$$
RNSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 10:25 PM EDT | Areal Flood Warning | PHI | Bucks | 73 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2008Every severe thunderstorm warning in 2008
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.