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 Mar 3, 2017, 3:42 PM EST for Delaware County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 33 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
- Mar 3, 2017, 3:42 PM EST (20:42 UTC)
- Expired
- Mar 3, 2017, 4:15 PM EST
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
Counties Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 20:46 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, 8.7 hours before the alert went out and 221 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
- 950 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- -136 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
332
WWUS81 KPHI 032042
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
342 PM EST FRI MAR 3 2017
NJZ018-PAZ070-071-101>106-032115-
Camden-Lower Bucks-Upper Bucks-Eastern Montgomery-Western
Montgomery-Delaware-Western Chester-Eastern Chester-Philadelphia-
342 PM EST FRI MAR 3 2017
...A SNOW SQUALL WILL AFFECT NORTHWESTERN CAMDEN...NORTHWESTERN
BURLINGTON...MONTGOMERY...SOUTHEASTERN BUCKS...NORTHEASTERN
CHESTER...PHILADELPHIA AND CENTRAL DELAWARE COUNTIES...
At 340 PM EST, a snow squall was located along a line extending from
Hatfield to Lionville to near Honey Brook. Movement was east at 35
mph.
This squall will be near...
Norristown, Lansdale, East Norriton and Hatfield around 345 PM
EST.
Phoenixville and Plymouth Meeting around 350 PM EST.
Ambler and Valley Forge around 355 PM EST.
Paoli around 400 PM EST.
Hatboro, Jenkintown, Abington, Bryn Athyn, Ivyland, Willow Grove,
Gradyville and Lima around 405 PM EST.
Rockledge, Broomall, Newtown Square, Trout Lake, Radnor Township
and Richboro around 410 PM EST.
Philadelphia, Bensalem, Yeadon, Bristol, Folcroft, Swarthmore,
Narberth, East Lansdowne, Langhorne and Feasterville around 415 PM
EST.
Visibilities in this squall will drop quickly to a quarter mile in
spots for a few minutes. Wind gusts up to 40 mph are also possible.
Any snowfall accumulations will be minor and limited to grassy
surfaces.
Use extra caution and reduce speed if traveling into or through this
snow squall. Rapid changes in visibility could lead to accidents.
LAT...LON 4011 7594 4012 7592 4013 7568 4030 7532
4016 7473 4012 7478 4013 7482 4008 7487
4007 7494 4002 7504 3996 7513 3992 7514
3988 7524 3996 7569
TIME...MOT...LOC 2040Z 291DEG 29KT 4026 7532 4007 7567 4010 7585
$$
JRKThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 3, 3:04 PM EST | Special Weather Statement | PHI | Gloucester, Salem | 41 min |
| Mar 3, 3:18 PM EST | Special Weather Statement | PHI | Sussex, Warren | 57 min |
| Mar 3, 4:08 PM EST | Special Weather Statement | PHI | Warren | 37 min |
| Mar 3, 4:48 PM EST | Special Weather Statement | PHI | Hunterdon, Mercer | 42 min |
| Mar 3, 4:54 PM EST | Special Weather Statement | PHI | Morris, Somerset | 36 min |
| Mar 3, 5:31 PM EST | Special Weather Statement | PHI | Camden, Mercer | 29 min |
| Mar 3, 5:52 PM EST | Special Weather Statement | PHI | Burlington, Camden, Gloucester | 23 min |
| Mar 3, 6:17 PM EST | Special Weather Statement | PHI | Burlington, Ocean | 28 min |
| Mar 3, 3:08 PM EST | Special Weather Statement | PHI | Montgomery | 37 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.