Alert archive / Pennsylvania / Special Weather Statements in 2015
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Oct 18, 2015, 5:49 PM EDT for Montgomery County, Pennsylvania. It was in force for 56 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 18, 2015, 5:49 PM EDT (21:49 UTC)
- Expired
- Oct 18, 2015, 6:45 PM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 93 km from the middle of the area, began a volume at 21:51 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 12:00Z, 9.8 hours before the alert went out and 210 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
- 1326 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
567
WWUS81 KPHI 182149
SPSPHI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
549 PM EDT SUN OCT 18 2015
PAZ101>104-182245-
WESTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-EASTERN
CHESTER-
549 PM EDT SUN OCT 18 2015
...A SHOWER WILL AFFECT NORTHEASTERN CHESTER AND CENTRAL
MONTGOMERY COUNTIES...
AT 546 PM EDT...A SHOWER WAS OVER POTTSTOWN...OR 17 MILES SOUTHEAST
OF READING...MOVING SOUTHEAST AT 25 MPH.
WIND GUSTS UP TO 40 MPH AND GRAUPEL ARE LIKELY WITH THIS
SHOWER.
LOCATIONS POSSIBLY IMPACTED INCLUDE...
NORRISTOWN...POTTSTOWN...PHOENIXVILLE...WEST NORRITON...EAST
NORRITON...CONSHOHOCKEN...AMBLER...COLLEGEVILLE...ROYERSFORD...
TRAPPE...SCHWENKSVILLE...PLYMOUTH MEETING...VALLEY FORGE...KING OF
PRUSSIA...CEDARVILLE...GILBERTSVILLE...PUGHTOWN...PAOLI...RADNOR
TOWNSHIP AND SKIPPACK.
LAT...LON 4025 7569 4033 7561 4014 7518 4004 7534
4006 7536 4005 7540 4003 7540 4000 7545
3998 7544 4020 7577
TIME...MOT...LOC 2148Z 307DEG 23KT 4023 7562
$$The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 18, 4:30 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Oct 18, 5:58 PM EDT | Special Marine Warning | PHI | 2 hr | |
| Oct 18, 6:14 PM EDT | Special Weather Statement | PHI | Atlantic | 31 min |
| Oct 18, 6:17 PM EDT | Special Weather Statement | PHI | Cape May | 58 min |
| Oct 18, 6:30 PM EDT | Special Weather Statement | PHI | Cape May | 45 min |
| Oct 18, 3:22 AM EDT | Frost Advisory | PHI | Delaware, Philadelphia | 11 hr |
| Oct 18, 5:38 PM EDT | Special Weather Statement | PHI | Caroline | 82 min |
| Oct 18, 4:36 PM EDT | Special Weather Statement | PHI | Kent | 69 min |
| Oct 18, 4:54 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 66 min |
Nearby
Special Weather Statements in Pennsylvania, 2015Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.