Alert archive / Pennsylvania / Special Weather Statements in 2017
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Feb 12, 2017, 10:20 PM EST for Berks County, Lehigh County, Montgomery County, Pennsylvania. It was in force for 70 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
- Feb 12, 2017, 10:20 PM EST (03:20 UTC)
- Expired
- Feb 12, 2017, 11:30 PM EST
- In force
- 70 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Berks County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 03:20 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 nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 3.3 hours before the alert went out and 208 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
- 854 m above ground
- 0-6 km bulk shear
- 90 kt
- 0-1 km storm-relative helicity
- -382 m²/s²
- 0-3 km storm-relative helicity
- -107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
848
WWUS81 KPHI 130320
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1020 PM EST SUN FEB 12 2017
PAZ060-061-101>106-130430-
Lower Bucks-Upper Bucks-Lehigh-Eastern Montgomery-Western
Montgomery-Western Chester-Eastern Chester-Berks-
1020 PM EST SUN FEB 12 2017
...BRIEF PERIOD OF FREEZING RAIN WILL AFFECT SPOTS IN FREEZING RAIN
WILL AFFECT BERKS...MONTGOMERY...SOUTHERN LEHIGH...NORTHWESTERN
BUCKS...NORTHEASTERN CHESTER AND SOUTHERN NORTHAMPTON COUNTIES...
At 1016 PM EST, an area of showers was located along a line
extending from Hamburg to Hummelstown. Movement was east at 45 mph.
With temperatures still at or just below freezing in some spots, a
brief period of light freezing rain will occur late this evening. A
light glaze of icing is possible.
Winds will increase behind these showers with gusts to 40 mph
possible late this evening.
Locations impacted include...
Allentown, Reading, Norristown, Pottstown, Phoenixville, Lansdale,
West Norriton, East Norriton, Emmaus, Wyomissing, Quakertown,
Perkasie, Doylestown, Souderton, Bedminster, Ambler, Birdsboro,
Collegeville, Kutztown and Royersford.
Conditions can deteriorate rapidly in winter weather situations. Be
prepared for icy roads...especially untreated secondary roads,
bridges and overpasses. Slow down and allow extra time if traveling
this evening.
LAT...LON 4049 7643 4054 7617 4058 7605 4057 7602
4063 7600 4067 7592 4059 7540 4054 7533
4057 7528 4052 7506 4011 7522 4006 7547
4009 7580 4000 7593 4001 7595 4004 7593
4011 7594 4014 7588
TIME...MOT...LOC 0316Z 279DEG 50KT 4054 7598 4027 7670
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 11:10 PM EST | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Monmouth and 2 more | 50 min |
| Feb 12, 11:33 PM EST | Special Marine Warning | PHI | 87 min | |
| Feb 12, 11:53 PM EST | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more | 52 min |
| Feb 13, 12:02 AM EST | Special Marine Warning | PHI | 88 min | |
| Feb 13, 1:25 AM EST | Special Weather Statement | PHI | Morris, Somerset, Sussex, Warren | 50 min |
| Feb 13, 12:29 PM EST | Gale Warning | PHI | 9 hr | |
| Feb 12, 11:14 PM EST | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 46 min |
Nearby
Special Weather Statements in Pennsylvania, 2017Every special weather statement in 2017
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.