Alert archive / Pennsylvania / Special Weather Statements in 2012
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Jul 7, 2012, 8:45 PM EDT for Chester 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 7, 2012, 8:45 PM EDT (00:45 UTC)
- Expired
- Jul 7, 2012, 9:45 PM EDT
- In force
- 60 min
- Issued by
- NWS Philadelphia/Mount Holly
County Chester County, PA
The radar
The Dover AFB radar (KDOX), 117 km from the middle of the area, began a volume at 00:44 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 7, 9:18 PM EDT | HAIL 0.88 | Coatesville, PA | |
| Jul 7, 9:22 PM EDT | HAIL 1 | Coatesville, PA |
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 00:00Z, 0.8 hours before the alert went out and 167 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
- 0 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
584
WWUS81 KPHI 080045
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
845 PM EDT SAT JUL 7 2012
DEZ001-PAZ067-070-080145-
CHESTER PA-DELAWARE PA-NEW CASTLE DE-
845 PM EDT SAT JUL 7 2012
...A STRONG THUNDERSTORM WILL AFFECT CHESTER...DELAWARE AND NEW
CASTLE COUNTIES...
AT 844 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 5 MILES SOUTH OF LANCASTER...MOVING EAST AT 45
MPH. THE THUNDERSTORM WILL BE NEAR ATGLEN...COCHRANVILLE AROUND 915
PM...ELAM...KENNETT SQUARE AROUND 930 PM...CONCORDVILLE AND CHELSEA
AROUND 945 PM.
WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
LAT...LON 3983 7602 3985 7603 3988 7600 3996 7600
4003 7594 4008 7594 4001 7540 3972 7547
3971 7552 3966 7555 3970 7579 3972 7579
3972 7587 3976 7608
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 8:33 PM EDT | Special Marine Warning | PHI | 44 min | |
| Jul 7, 10:50 PM EDT | Special Weather Statement | PHI | Warren | 55 min |
| Jul 7, 10:53 PM EDT | Special Weather Statement | PHI | Ocean | 52 min |
| Jul 7, 11:04 PM EDT | Special Weather Statement | PHI | Middlesex, Monmouth | 56 min |
| Jul 7, 11:36 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 54 min |
| Jul 8, 1:06 AM EDT | Special Weather Statement | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 54 min |
| Jul 7, 9:05 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 32 min |
| Jul 8, 7:33 PM EDT | Special Weather Statement | PHI | Sussex | 57 min |
| Jul 8, 6:16 PM EDT | Special Weather Statement | PHI | Talbot | 59 min |
Nearby
Special Weather Statements in Pennsylvania, 2012Every special weather statement in 2012
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.