Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 27, 2021Carbon County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 27, 2021, 10:42 PM EDT for Carbon 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
Jul 27, 2021, 10:42 PM EDT (02:42 UTC)
Expired
Jul 27, 2021, 11:15 PM EDT
In force
33 min
Issued by
NWS Philadelphia/Mount Holly

County Carbon County, PA

The radar

The Binghamton radar (KBGM), 128 km from the middle of the area, began a volume at 02:41 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

Albany, NY (KALY), launched 00:00Z, 2.7 hours before the alert went out and 235 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.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2021-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2021-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
4 J/kg
Mixed-layer CIN
-126 J/kg
Mixed-layer LCL
1090 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
65 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-1.7

Open this sounding in Storm Lab

The text

As transmitted.

223 
WWUS81 KPHI 280242
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
1042 PM EDT Tue Jul 27 2021

PAZ054-055-280315-
Monroe-Carbon-
1042 PM EDT Tue Jul 27 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN CARBON AND WEST
CENTRAL MONROE COUNTIES...

At 1042 PM EDT, a strong thunderstorm was located near Penobscot, or
9 miles south of Wilkes-Barre, moving east at 35 mph.

Wind gusts up to 40 mph are possible with this storm.

Locations impacted include...
Blakeslee, Lake Harmony, Christmans, Albrightsville, Arrowhead Lake
and Pocono Pines.

This includes the following highways...
 Northeast Extension between mile markers 85 and 97.
 Interstate 80 in Pennsylvania between mile markers 277 and 291.

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

LAT...LON 4113 7546 4094 7561 4099 7576 4101 7573
      4103 7574 4105 7577 4109 7577 4111 7571
      4113 7569 4113 7567 4112 7565 4116 7560
TIME...MOT...LOC 0242Z 291DEG 31KT 4112 7583 

$$

MPS

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 27, 10:44 PM EDTSpecial Weather StatementPHIWarren31 min
Jul 27, 11:13 PM EDTSpecial Weather StatementPHIWarren47 min
Jul 28, 3:53 PM EDTSpecial Weather StatementPHICape May22 min
Jul 27, 8:06 PM EDTSpecial Weather StatementPHIMonroe24 min
Jul 27, 10:22 PM EDTSpecial Weather StatementPHIMonroe23 min
Jul 28, 4:20 PM EDTSpecial Weather StatementPHISussex40 min
Jul 28, 6:25 PM EDTSpecial Weather StatementPHIKent35 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.