Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special weather statement at Sep 23, 2021, 12:57 PM EDT for Bucks 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
- Sep 23, 2021, 12:57 PM EDT (16:57 UTC)
- Expired
- Sep 23, 2021, 1:30 PM EDT
- In force
- 33 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.00 in
- Wind
- 40
County Bucks County, PA
The radar
The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 17:02 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 12:00Z, 5.0 hours before the alert went out and 215 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
- 103 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 249 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.1
The text
As transmitted.
748
WWUS81 KPHI 231657
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
1257 PM EDT Thu Sep 23 2021
NJZ007-009-017-PAZ061-062-070-071-103>106-231730-
Hunterdon NJ-Warren NJ-Gloucester NJ-Lower Bucks PA-Upper Bucks PA-
Lehigh PA-Eastern Montgomery PA-Western Montgomery PA-Delaware PA-
Northampton PA-Philadelphia PA-
1257 PM EDT Thu Sep 23 2021
...Strong thunderstorms will impact portions of southwestern
Hunterdon, southwestern Warren, northwestern Gloucester, southeastern
Lehigh, central Montgomery, Bucks, northwestern Philadelphia, eastern
Delaware and southwestern Northampton Counties through 130 PM EDT...
At 1257 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from Geryville to near Chalfont to Darby Township.
Movement was north at 50 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Philadelphia, Allentown, Easton, Bethlehem, Norristown, Chester,
Lansdale, East Norriton, Yeadon, Emmaus, Northampton, Quakertown,
Perkasie, Doylestown, Byram, Wilson, Conshohocken, Hatboro, Souderton
and Folcroft.
This includes the following highways...
Pennsylvania Turnpike between mile markers 330 and 343.
Northeast Extension between mile markers 21 and 26, and between mile
markers 28 and 54.
Interstate 95 in Pennsylvania between mile markers 5 and 10.
Interstate 76 in Pennsylvania between mile markers 330 and 340.
Interstate 78 in Pennsylvania between mile markers 56 and 76.
Interstate 295 in New Jersey between mile markers 11 and 12.
Interstate 476 in Pennsylvania between mile markers 0 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4056 7502 4039 7496 3976 7535 3990 7540
4021 7532 4039 7558 4044 7553 4047 7557
4082 7544
TIME...MOT...LOC 1657Z 200DEG 42KT 4044 7549 4023 7520 3990 7529
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
$$
StaarmannThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 22, 8:43 PM EDT | Gale Warning | PHI | 18 hr | |
| Sep 23, 9:12 AM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester | 10 hr |
| Sep 23, 11:33 AM EDT | Areal Flood Advisory | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Sep 23, 11:57 AM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 3 hr |
| Sep 23, 12:12 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 48 min |
| Sep 23, 12:54 PM EDT | Special Weather Statement | PHI | Gloucester | 51 min |
| Sep 23, 12:56 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Hunterdon, Mercer, Warren | 3 hr |
| Sep 23, 1:13 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester, Salem | 47 min |
| Sep 23, 1:42 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Sep 23, 1:58 PM EDT | Special Weather Statement | PHI | Camden, Hunterdon | 32 min |
| Sep 23, 2:37 PM EDT | Areal Flood Advisory | PHI | Burlington, Hunterdon, Mercer, Middlesex, Monmouth, Morris and 3 more | 3 hr |
| Sep 23, 2:47 PM EDT | Special Weather Statement | PHI | Hunterdon, Mercer | 28 min |
| Sep 23, 2:52 PM EDT | Special Weather Statement | PHI | Camden | 23 min |
| Sep 23, 3:13 PM EDT | Special Weather Statement | PHI | Mercer, Somerset | 32 min |
| Sep 23, 3:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Sep 23, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 52 min |
| Sep 23, 3:26 PM EDT | Flash Flood Warning | PHI | Burlington, Hunterdon, Mercer, Middlesex, Morris, Somerset | 2 hr |
| Sep 23, 3:50 PM EDT | Special Weather Statement | PHI | Burlington | 25 min |
| Sep 23, 4:21 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth, Morris, Ocean, Somerset, Sussex | 15 min |
| Sep 23, 4:36 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth, Morris, Somerset, Sussex | 3 hr |
| Sep 23, 5:00 PM EDT | Special Weather Statement | PHI | Monmouth | 30 min |
| Sep 23, 10:52 AM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Sep 23, 11:40 AM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton | 3 hr |
| Sep 23, 12:28 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 23, 1:48 PM EDT | River Flood Warning | PHI | Chester | 5 hr |
| Sep 23, 4:26 PM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 80 min |
| Sep 23, 7:18 PM EDT | Areal Flood Warning | PHI | Berks, Montgomery | 36 min |
| Sep 23, 11:11 AM EDT | Special Weather Statement | PHI | New Castle | 64 min |
| Sep 23, 11:42 AM EDT | Severe Thunderstorm Warning | PHI | New Castle | 33 min |
| Sep 23, 8:08 AM EDT | Special Weather Statement | PHI | Kent, Queen Anne's, Talbot | 52 min |
| Sep 23, 9:03 AM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's, Talbot | 3 hr |
| Sep 23, 9:31 AM EDT | Special Weather Statement | PHI | Kent, Queen Anne's, Talbot | 59 min |
| Sep 23, 9:46 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's, Talbot | 44 min |
| Sep 23, 9:49 AM EDT | Flash Flood Warning | PHI | Kent, Queen Anne's, Talbot | 4 hr |
| Sep 23, 10:35 AM EDT | Severe Thunderstorm Warning | PHI | Caroline, Kent, Queen Anne's | 40 min |
| Sep 23, 10:55 AM EDT | Areal Flood Advisory | PHI | Caroline, Kent, Queen Anne's, Talbot | 3 hr |
Nearby
Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021
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.