Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 9, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at May 16, 2015, 6:31 PM EDT for 5 counties in Pennsylvania. It was in force for 44 min. 5 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 16, 2015, 6:31 PM EDT (22:31 UTC)
- Expired
- May 16, 2015, 7:15 PM EDT
- In force
- 44 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Berks County, PA, Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 16, 6:43 PM EDT | TSTM WND GST 55 | Gilbertsville, PA | |
| May 16, 6:43 PM EDT | HAIL 0.25 | Gilbertsville, PA | |
| May 16, 6:47 PM EDT | HAIL 1 | Gilbertsville, PA | |
| May 16, 6:48 PM EDT | TSTM WND DMG | Douglass Twp, PA | TREE DOWN IN DOUGLASS TOWNSHIP |
| May 16, 6:48 PM EDT | TSTM WND DMG | New Hanover Twp, PA | TREE DOWN IN NEW HANOVER TOWNSHIP |
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 12:00Z, 10.5 hours before the alert went out and 209 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
- 20 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 1233 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
445 WUUS51 KPHI 162231 SVRPHI PAC011-017-029-077-091-162315- /O.NEW.KPHI.SV.W.0009.150516T2231Z-150516T2315Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 631 PM EDT SAT MAY 16 2015 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN LEHIGH COUNTY IN EASTERN PENNSYLVANIA... NORTHWESTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA... WEST CENTRAL BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA... NORTH CENTRAL CHESTER COUNTY IN SOUTHEASTERN PENNSYLVANIA... SOUTHEASTERN BERKS COUNTY IN EASTERN PENNSYLVANIA... * UNTIL 715 PM EDT * AT 630 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CEDARVILLE...OR 11 MILES EAST OF READING...AND MOVING EAST AT 20 MPH. * LOCATIONS IMPACTED INCLUDE... POTTSTOWN...LANSDALE...EMMAUS...SOUDERTON...BIRDSBORO... COLLEGEVILLE...ROYERSFORD...TRAPPE...HATFIELD...EAST GREENVILLE... SCHWENKSVILLE...ELVERSON...BALLY...BECHTELSVILLE...GREEN LANE... GERYVILLE...ZIONSVILLE...CEDARVILLE...SPRING MOUNT AND GILBERTSVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4013 7581 4030 7589 4054 7548 4020 7523 TIME...MOT...LOC 2230Z 251DEG 15KT 4027 7573 $$ SFJ
1 follow-up statement
779 WWUS51 KPHI 162250 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 650 PM EDT SAT MAY 16 2015 PAC011-017-029-077-091-162315- /O.CON.KPHI.SV.W.0009.000000T0000Z-150516T2315Z/ LEHIGH PA-MONTGOMERY PA-BUCKS PA-CHESTER PA-BERKS PA- 650 PM EDT SAT MAY 16 2015 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT FOR SOUTHEASTERN LEHIGH...NORTHWESTERN MONTGOMERY...WEST CENTRAL BUCKS...NORTH CENTRAL CHESTER AND SOUTHEASTERN BERKS COUNTIES... AT 649 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER GILBERTSVILLE...OR 18 MILES EAST OF READING...MOVING EAST AT 20 MPH. LOCATIONS IMPACTED INCLUDE... POTTSTOWN...LANSDALE...EMMAUS...SOUDERTON...COLLEGEVILLE... ROYERSFORD...TRAPPE...HATFIELD...EAST GREENVILLE...SCHWENKSVILLE... BALLY...BECHTELSVILLE...GREEN LANE...GERYVILLE...ZIONSVILLE... CEDARVILLE...SPRING MOUNT...GILBERTSVILLE...PUGHTOWN AND SKIPPACK. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4015 7568 4037 7578 4054 7548 4020 7523 TIME...MOT...LOC 2249Z 251DEG 19KT 4031 7558 $$ SFJ
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 4:46 PM EDT | Special Weather Statement | PHI | Pike | 44 min |
| May 16, 4:55 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| May 16, 5:09 PM EDT | Special Weather Statement | PHI | Berks, Chester | 66 min |
| May 16, 5:26 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 49 min |
| May 16, 5:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 39 min |
| May 16, 5:57 PM EDT | Special Weather Statement | PHI | Berks, Chester, Lehigh, Montgomery | 63 min |
| May 16, 6:03 PM EDT | Areal Flood Advisory | PHI | Monroe | 3 hr |
| May 16, 6:16 PM EDT | Special Weather Statement | PHI | Lehigh | 44 min |
| May 16, 6:45 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 45 min |
| May 16, 6:55 PM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 3 hr |
| May 16, 6:58 PM EDT | Special Weather Statement | PHI | Monroe | 62 min |
| May 16, 7:04 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 26 min |
| May 16, 7:34 PM EDT | Special Weather Statement | PHI | Bucks | 41 min |
| May 16, 7:35 PM EDT | Special Weather Statement | PHI | Delaware | 40 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2015Every severe thunderstorm warning in 2015
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.