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 15, 2021, 7:17 PM EDT for Lehigh County, Pennsylvania. It was in force for 28 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 15, 2021, 7:17 PM EDT (23:17 UTC)
- Expired
- Sep 15, 2021, 7:45 PM EDT
- In force
- 28 min
- Issued by
- NWS Philadelphia/Mount Holly
- Hail
- 0.25 in
- Wind
- 50
County Lehigh County, PA
The radar
The Philadelphia radar (KDIX), 138 km from the middle of the area, began a volume at 23:17 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, 11.3 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
- 13 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 1457 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
040
WWUS81 KPHI 152317
SPSPHI
Special Weather Statement
National Weather Service Mount Holly NJ
717 PM EDT Wed Sep 15 2021
PAZ060-061-152345-
Lehigh PA-Berks PA-
717 PM EDT Wed Sep 15 2021
...A strong thunderstorm will impact portions of northeastern Berks
and central Lehigh Counties through 745 PM EDT...
At 717 PM EDT, Doppler radar was tracking a strong thunderstorm near
Shoemakersville, or 13 miles north of Reading, moving east at 35 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Kutztown, Hamburg, Topton, Leesport, Shoemakersville, Lyons,
Lenhartsville, Ancient Oaks, Claussville, Macungie, Alburtis and
Centerport.
This includes Interstate 78 in Pennsylvania between mile markers 29
and 52.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
eastern Pennsylvania.
&&
LAT...LON 4045 7599 4056 7603 4071 7566 4049 7555
TIME...MOT...LOC 2317Z 250DEG 28KT 4053 7592
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 3:25 AM EDT | Small Craft Advisory | PHI | 21 hr | |
| Sep 15, 7:36 PM EDT | Special Weather Statement | PHI | Hunterdon, Morris | 24 min |
| Sep 15, 5:31 PM EDT | Special Weather Statement | PHI | Monroe | 29 min |
| Sep 15, 6:29 PM EDT | Special Weather Statement | PHI | Lebanon | 31 min |
| Sep 15, 6:48 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| Sep 15, 7:08 PM EDT | Severe Thunderstorm Warning | PHI | Berks | 37 min |
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.