Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 157, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Sep 6, 2014, 2:19 PM EDT for Chester County, Pennsylvania. It was in force for 43 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 6, 2014, 2:19 PM EDT (18:19 UTC)
- Expired
- Sep 6, 2014, 3:02 PM EDT
- In force
- 43 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 126 km from the middle of the area, began a volume at 18:20 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 6, 2:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 174 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
- 1444 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 867 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
922
WUUS51 KPHI 061819
SVRPHI
PAC029-061915-
/O.NEW.KPHI.SV.W.0157.140906T1819Z-140906T1915Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
219 PM EDT SAT SEP 6 2014
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
* UNTIL 315 PM EDT
* AT 218 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THE STORM WAS NEAR ATGLEN...MOVING EAST AT 5
MPH. THIS STORM IS CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
HOMEVILLE AROUND 230 PM EDT...
HONEY BROOK AROUND 235 PM EDT...
PARKESBURG AROUND 250 PM EDT...
COCHRANVILLE AROUND 255 PM EDT...
COATESVILLE AND WEST GROVE AROUND 315 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE WINDS OF MORE THAN 57 MPH...OR HAIL ONE
INCH OR LARGER.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
&&
LAT...LON 3985 7603 3988 7599 3997 7600 4004 7594
4010 7595 4023 7562 4022 7561 3973 7579
TIME...MOT...LOC 1819Z 281DEG 6KT 3993 7599
$$
FORECASTER: SFJ2 follow-up statements
563
WWUS51 KPHI 061833
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
233 PM EDT SAT SEP 6 2014
PAC029-061915-
/O.CON.KPHI.SV.W.0157.000000T0000Z-140906T1915Z/
CHESTER PA-
233 PM EDT SAT SEP 6 2014
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT
FOR WESTERN CHESTER COUNTY...
AT 231 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ATGLEN...OR 14 MILES
SOUTHEAST OF NEW HOLLAND...MOVING EAST AT 5 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
PARKESBURG BY 240 PM EDT...
COCHRANVILLE AND PARKESBURG BY 245 PM EDT...
COCHRANVILLE BY 250 PM EDT...
SOUTH COATESVILLE...MODENA...COATESVILLE AND 6 MILES NORTH OF WEST
GROVE BY 315 PM EDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 3985 7603 3988 7599 3997 7600 4004 7594
4010 7595 4023 7562 4022 7561 3973 7579
TIME...MOT...LOC 1833Z 281DEG 6KT 3992 7595
$$
SFJ110
WWUS51 KPHI 061902
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
302 PM EDT SAT SEP 6 2014
PAC029-061911-
/O.CAN.KPHI.SV.W.0157.000000T0000Z-140906T1915Z/
CHESTER PA-
302 PM EDT SAT SEP 6 2014
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN CHESTER COUNTY IS
CANCELLED...
THE STORM THAT PROMPTED THE WARNING HAS WEAKENED. HOWEVER...VERY
HEAVY RAIN IS OCCURRING WITH THIS STORM. THUS...A FLOOD ADVISORY
REMAINS IN EFFECT FOR MUCH OF CHESTER COUNTY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT
SATURDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND NEW
JERSEY AND EASTERN PENNSYLVANIA.
LAT...LON 3985 7603 3988 7599 3997 7600 4004 7594
4010 7595 4023 7562 4022 7561 3973 7579
TIME...MOT...LOC 1901Z 281DEG 6KT 3991 7589
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 1:37 PM EDT | Special Weather Statement | PHI | Northampton | 53 min |
| Sep 6, 2:13 PM EDT | Special Weather Statement | PHI | Chester | 62 min |
| Sep 6, 2:43 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Sep 6, 3:21 PM EDT | Special Weather Statement | PHI | Berks, Bucks, Lehigh, Montgomery | 54 min |
| Sep 6, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 60 min |
| Sep 6, 3:51 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Sep 6, 4:52 PM EDT | Severe Thunderstorm Warning | PHI | Delaware | 36 min |
| Sep 6, 7:36 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 54 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2014Every severe thunderstorm warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.