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 30, 2017, 10:12 PM EDT for Montgomery 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 30, 2017, 10:12 PM EDT (02:12 UTC)
- Expired
- Mar 30, 2017, 10:45 PM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
County Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 83 km from the middle of the area, began a volume at 02:13 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
Brookhaven, NY (KOKX), launched 00:00Z, 2.2 hours before the alert went out and 217 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
- 1601 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
925 WWUS81 KPHI 310212 SPSPHI Special Weather Statement National Weather Service Mount Holly NJ 1012 PM EDT THU MAR 30 2017 PAZ103>106-310245- Lower Bucks-Upper Bucks-Eastern Montgomery-Western Montgomery- 1012 PM EDT THU MAR 30 2017 ...A STRONG THUNDERSTORM PRODUCING PEA SIZE HAIL WILL AFFECT CENTRAL MONTGOMERY AND CENTRAL BUCKS COUNTIES... At 1010 PM EDT, a strong thunderstorm was located near Schwenksville, or 21 miles northwest of Philadelphia, moving east at 40 mph. This storm has a history of producing pea size hail and cloud to ground lightning. Downpours will also occur. This storm will be near... Souderton and Hatfield around 1015 PM EDT. Lansdale and Fricks around 1020 PM EDT. Ambler and Chalfont around 1025 PM EDT. Doylestown around 1030 PM EDT. Hatboro, Bryn Athyn, Ivyland and Willow Grove around 1035 PM EDT. Richboro around 1040 PM EDT. Other locations impacted by this storm include Harleysville, Horsham, Warminster Heights, Telford, Maple Glen, Brittany Farms-Highlands, New Britain, North Wales, Spring House and Kulpsville. LAT...LON 4022 7555 4033 7546 4033 7494 4013 7503 TIME...MOT...LOC 0210Z 275DEG 37KT 4024 7540 $$ Gorse
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 2:59 AM EDT | Coastal Flood Advisory | PHI | Middlesex, Monmouth, Ocean | 25 hr |
| Mar 31, 3:41 AM EDT | Flood Watch | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 9 more | 20 hr |
| Mar 31, 4:36 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 4 hr |
| Mar 31, 4:50 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Mar 31, 5:20 PM EDT | Areal Flood Warning | PHI | Hunterdon, Somerset | 3 hr |
| Mar 31, 6:05 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Ocean | 3 hr |
| Mar 31, 6:30 PM EDT | Areal Flood Advisory | PHI | Mercer, Middlesex, Monmouth, Somerset | 7 hr |
| Mar 30, 10:57 PM EDT | Special Weather Statement | PHI | Berks, Lehigh | 33 min |
| Mar 31, 7:16 PM EDT | River Flood Warning | PHI | Chester | 8 hr |
| Mar 31, 5:35 PM EDT | River Flood Warning | PHI | New Castle | 8 hr |
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.