Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 172, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2008, 1:00 PM EDT for Bucks County, Montgomery County, Pennsylvania. It was in force for 60 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
- Jul 27, 2008, 1:00 PM EDT (17:00 UTC)
- Expired
- Jul 27, 2008, 2:00 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 16:59 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 |
|---|---|---|---|
| Jul 27, 1:40 PM EDT | TSTM WND DMG | New Britain, PA | TREES DOWN. |
| Jul 27, 1:50 PM EDT | TSTM WND DMG | 1 W Ivyland, PA | TREES DOWN IN WARRINGTON. |
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 |
|---|---|---|---|
| Jul 27, 11:26 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 5.0 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
- 88 J/kg
- Mixed-layer CIN
- -167 J/kg
- Mixed-layer LCL
- 1310 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 271701 SVRPHI PAC017-091-271800- /O.NEW.KPHI.SV.W.0172.080727T1700Z-080727T1800Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 100 PM EDT SUN JUL 27 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 200 PM EDT * AT 1258 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GILBERTSVILLE...AND MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... SPRING MOUNT BY 110 PM... SOUDERTON AND PERKASIE BY 125 PM... FRICKS AND LANSDALE BY 130 PM... CHALFONT...DUBLIN AND AMBLER BY 135 PM... DOYLESTOWN AND GARDENVILLE BY 145 PM... 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 SUNDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW JERSEY AND EASTERN PENNSYLVANIA. LAT...LON 4043 7506 4009 7508 4024 7563 4036 7560 TIME...MOT...LOC 1700Z 273DEG 25KT 4030 7553 $$ IOVINO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 11:50 AM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 70 min |
| Jul 27, 12:07 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 53 min |
| Jul 27, 12:19 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Lehigh, Montgomery | 56 min |
| Jul 27, 12:25 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 3 hr |
| Jul 27, 12:38 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 67 min |
| Jul 27, 12:50 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 3 hr |
| Jul 27, 12:57 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 63 min |
| Jul 27, 1:34 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jul 27, 1:44 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 61 min |
| Jul 27, 2:11 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 64 min |
| Jul 27, 2:14 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 61 min |
| Jul 27, 2:17 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 58 min |
| Jul 27, 2:30 PM EDT | Areal Flood Advisory | PHI | Bucks | 2 hr |
| Jul 27, 5:04 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester | 56 min |
| Jul 27, 6:44 PM EDT | Areal Flood Advisory | PHI | Chester | 72 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.