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 Oct 19, 2012, 9:24 PM EDT for Chester County, Delaware County, Montgomery County, Pennsylvania. It was in force for 96 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
- Oct 19, 2012, 9:24 PM EDT (01:24 UTC)
- Expired
- Oct 19, 2012, 11:00 PM EDT
- In force
- 96 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Chester County, PA, Delaware County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 105 km from the middle of the area, began a volume at 01:26 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 1.4 hours before the alert went out and 202 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
- 1810 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
278
WWUS81 KPHI 200124
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
924 PM EDT FRI OCT 19 2012
DEZ001-MDZ008-PAZ067-068-070-200300-
CECIL MD-CHESTER PA-DELAWARE PA-MONTGOMERY PA-NEW CASTLE DE-
924 PM EDT FRI OCT 19 2012
...STRONG THUNDERSTORMS WILL AFFECT CECIL...CHESTER...DELAWARE...
MONTGOMERY AND NEW CASTLE COUNTIES...
AT 921 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 13 MILES SOUTH OF
READING TO 12 MILES WEST OF WEST CHESTER TO 5 MILES NORTHWEST OF
NEWARK...MOVING NORTHEAST AT 25 MPH. THE THUNDERSTORMS WILL BE NEAR
KEMBLESVILLE...APPLETON AROUND 930 PM...PUGHTOWN...CEDARVILLE AROUND
945 PM...WESTTOWN...ELAM AROUND 1000 PM...EAST GREENVILLE...
CONCORDVILLE AROUND 1015 PM...TROUT LAKE AND NEWTOWN SQUARE AROUND
1030 PM.
VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL POOR DRAINAGE AREAS.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.
LAT...LON 4013 7591 4025 7569 4045 7553 4038 7541
4029 7531 3995 7530 3953 7591
$$
FORECASTER: HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 19, 9:36 PM EDT | Small Craft Advisory for Hazardous Seas | PHI | 18 hr | |
| Oct 19, 10:15 PM EDT | Special Weather Statement | PHI | Warren | 60 min |
| Oct 20, 3:16 PM EDT | Small Craft Advisory | PHI | 12 hr | |
| Oct 19, 8:31 PM EDT | Special Weather Statement | PHI | Berks | 44 min |
| Oct 19, 8:42 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 63 min |
| Oct 19, 8:59 PM EDT | Tornado Warning | PHI | Berks | 31 min |
| Oct 19, 10:00 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 63 min |
| Oct 19, 10:27 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 63 min |
| Oct 19, 10:36 PM EDT | Special Weather Statement | PHI | Caroline | 54 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.