Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

July 27, 2021Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jul 27, 2021, 8:06 PM EDT for Monroe County, Pennsylvania. It was in force for 24 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, 8:06 PM EDT (00:06 UTC)
Expired
Jul 27, 2021, 8:30 PM EDT
In force
24 min
Issued by
NWS Philadelphia/Mount Holly

County Monroe County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 00:10 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, 0.1 hours before the alert went out and 212 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, Brookhaven, NY at 00:00Z on 2021-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 190 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2021-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.193958Sfc1 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
190 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
1682 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.9

Open this sounding in Storm Lab

The text

As transmitted.

585 
WWUS81 KPHI 280006
SPSPHI

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

PAZ054-055-280030-
Monroe-Carbon-
806 PM EDT Tue Jul 27 2021

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CARBON AND
SOUTHWESTERN MONROE COUNTIES...

At 806 PM EDT, a strong thunderstorm was located over Christmans, or
10 miles northeast of Lehighton, moving east at 35 mph.

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

Locations impacted include...
East Stroudsburg, Wind Gap, Stormville, Reeders, Brodheadsville,
Saylorsburg, Gilbert, McMichael, Penn Forest Reservoir,
Albrightsville, Kresgeville, Christmans, Sun Valley, Jonas,
Meckesville, Rossland, Stroudsburg, Arlington Heights, Effort and
Merwinsburg.

This includes the following highways...
 Northeast Extension between mile markers 81 and 89.
 Interstate 80 in Pennsylvania between mile markers 305 and 309.

LAT...LON 4102 7519 4087 7528 4086 7529 4090 7568
      4102 7568
TIME...MOT...LOC 0006Z 274DEG 30KT 4096 7560 

$$

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, 10:22 PM EDTSpecial Weather StatementPHIMonroe23 min
Jul 27, 10:42 PM EDTSpecial Weather StatementPHICarbon33 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.