Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 168, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 27, 2008, 12:19 PM EDT for 4 counties in Pennsylvania. It was in force for 56 min. 3 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, 12:19 PM EDT (16:19 UTC)
- Expired
- Jul 27, 2008, 1:15 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 16:22 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, 12:30 PM EDT | HAIL 0.5 | 1 Nne Lorane, PA | MARBLE SIZE HAIL, ONE-HALF INCH IN DIAMETER, WAS REPORTED IN EXETER TOWNSHIP. |
| Jul 27, 12:48 PM EDT | HAIL 0.75 | 3 Nw Boyertown, PA | HAIL UP TO THE SIZE OF PENNIES REPORTED NEAR BOYERTOWN. |
| Jul 27, 12:50 PM EDT | HAIL 0.75 | 3 N Pottstown, PA | PENNY SIZE HAIL REPORTED NEAR POTTSTOWN. |
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
Washington/Dulle, VA (KIAD), launched 12:00Z, 4.3 hours before the alert went out and 216 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
- 1356 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1062 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 63 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 271619 SVRPHI PAC011-029-077-091-271715- /O.NEW.KPHI.SV.W.0168.080727T1619Z-080727T1715Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1219 PM EDT SUN JUL 27 2008 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA... SOUTH CENTRAL LEHIGH COUNTY IN EASTERN PENNSYLVANIA... EXTREME NORTH CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA... NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA... * UNTIL 115 PM EDT * AT 1217 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 READING...AND MOVING EAST AT 28 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... BIRDSBORO BY 1235 PM... POTTSTOWN BY 1255 PM... GILBERTSVILLE BY 100 PM... EAST GREENVILLE BY 110 PM... ZIONSVILLE BY 115 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 4055 7549 4021 7549 4027 7601 4037 7602 TIME...MOT...LOC 1619Z 261DEG 24KT 4033 7597 $$ 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, 12:25 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, 1:00 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 60 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.