Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 37, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 12, 2015, 5:07 PM EDT for Lehigh County, Northampton County, Pennsylvania. It was in force for 38 min. 4 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
- Jun 12, 2015, 5:07 PM EDT (21:07 UTC)
- Expired
- Jun 12, 2015, 5:45 PM EDT
- In force
- 38 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Lehigh County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 21:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 5:22 PM EDT | TSTM WND DMG | Whitehall Twp, PA | NUMEROUS TREES DOWN AND POWER OUTAGES |
| Jun 12, 5:23 PM EDT | TSTM WND GST 56 | Lehigh Valley Intl Airp, PA | |
| Jun 12, 5:30 PM EDT | TSTM WND DMG | 1 Wnw Altonah, PA | 12 TO 14 TRACTOR TRAILERS BLOWN OVER. NUMEROUS TREES BLOWN DOWN. ONE BUSINESS IN THE AREA HAD LOST ITS ROOF. TIME ESTIMATED FROM RADAR |
| Jun 12, 5:30 PM EDT | TSTM WND DMG | 1 Wnw Altonah, PA | 12 TO 14 TRACTOR TRAILERS BLOWN OVER. NUMEROUS TREES BLOWN DOWN. TIME ESTIMATED FROM RADAR |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 224 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2083 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
961 WUUS51 KPHI 122107 SVRPHI PAC077-095-122145- /O.NEW.KPHI.SV.W.0037.150612T2107Z-150612T2145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 507 PM EDT FRI JUN 12 2015 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... CENTRAL LEHIGH COUNTY IN EASTERN PENNSYLVANIA... * UNTIL 545 PM EDT * AT 507 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER COFFEETOWN...OR NEAR ALLENTOWN...AND MOVING NORTHEAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... ALLENTOWN...BETHLEHEM...NORTHAMPTON...NAZARETH...BATH...TATAMY... STEUBEN...BEERSVILLE...DANIELSVILLE...BERLINSVILLE...COFFEETOWN... SCHNECKSVILLE...ANCIENT OAKS...CATASAUQUA...COPLAY...NORTH CATASAUQUA...STOCKERTOWN...CHAPMAN...HOKENDAUQUA AND EASTLAWN GARDENS. 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 4053 7555 4058 7566 4080 7556 4076 7519 TIME...MOT...LOC 2107Z 210DEG 19KT 4061 7556 $$ JJM
1 follow-up statement
029 WWUS51 KPHI 122126 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 526 PM EDT FRI JUN 12 2015 PAC077-095-122145- /O.CON.KPHI.SV.W.0037.000000T0000Z-150612T2145Z/ NORTHAMPTON PA-LEHIGH PA- 526 PM EDT FRI JUN 12 2015 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR CENTRAL NORTHAMPTON AND EAST CENTRAL LEHIGH COUNTIES... AT 526 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER STEUBEN...OR 8 MILES NORTHEAST OF ALLENTOWN...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... ALLENTOWN...BETHLEHEM...NORTHAMPTON...NAZARETH...BATH...TATAMY... STEUBEN...BEERSVILLE...CATASAUQUA...COPLAY...NORTH CATASAUQUA... STOCKERTOWN...CHAPMAN...HOKENDAUQUA...EASTLAWN GARDENS AND FULLERTON. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL... DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4058 7547 4063 7554 4079 7546 4076 7519 TIME...MOT...LOC 2126Z 232DEG 24KT 4069 7539 $$ JJM
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 8:57 PM EDT | Special Weather Statement | PHI | Schuylkill | 48 min |
| Jun 11, 9:23 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 52 min |
| Jun 11, 9:33 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Jun 11, 9:41 PM EDT | Areal Flood Advisory | PHI | Lehigh, Northampton | 4 hr |
| Jun 11, 9:54 PM EDT | Special Weather Statement | PHI | Berks | 51 min |
| Jun 12, 4:38 PM EDT | Special Weather Statement | PHI | Montgomery | 52 min |
| Jun 12, 4:57 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
| Jun 12, 5:41 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 49 min |
| Jun 12, 6:13 PM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 28 min |
| Jun 12, 6:53 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh, Northampton | 52 min |
| Jun 12, 7:27 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 33 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; radar from the NEXRAD Level II archive.