Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 27, 2007, 9:27 PM EDT for 4 counties in Pennsylvania. It was in force for 63 min. 2 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
- May 27, 2007, 9:27 PM EDT (01:27 UTC)
- Expired
- May 27, 2007, 10:30 PM EDT
- In force
- 63 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Counties, with a storm outline in the text
Counties Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 9:41 PM EDT | TSTM WND DMG | Chesterbrook, PA | TREES AND WIRES DOWNED IN TREDYFFRIN |
| May 27, 9:45 PM EDT | TSTM WND DMG | Radnor Township, PA | TREES AND WIRES REPORTED DOWN IN SEVERAL TOWNSHIPS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.5 hours before the alert went out and 214 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
- 16 J/kg
- Mixed-layer CIN
- -171 J/kg
- Mixed-layer LCL
- 2137 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 228 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 280127
SVRPHI
PAC029-045-091-101-280230-
/O.NEW.KPHI.SV.W.0024.070528T0127Z-070528T0230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
927 PM EDT SUN MAY 27 2007
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EAST CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF SPRINGFIELD...
SOUTHERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF PHILADELPHIA...
* UNTIL 1030 PM EDT
* AT 920 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR PAOLI...OR ABOUT 8 MILES
NORTHWEST OF SPRINGFIELD...AND MOVING EAST AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
EAST LANSDOWNE AND YEADON BY 935 PM EDT...
ROXBOROUGH...GERMANTOWN...SOUTH PHILADELPHIA AND CHESTNUT HILL BY
940 PM EDT...
CENTER CITY AND PHILADELPHIA BY 945 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 4010 7561 3983 7552 3989 7522 4004 7499
4016 7506 4014 7540
$$
NIERENBERGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 8:18 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 57 min |
| May 27, 9:10 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 50 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2007Every severe thunderstorm warning in 2007
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.