Alert archive / Pennsylvania / Special Weather Statements in 2021

Special Weather Statement, NWS Philadelphia/Mount Holly

January 22, 2021Sussex County, New Jersey; Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this special weather statement at Jan 22, 2021, 5:05 PM EST for Sussex County, New Jersey; Carbon County, Monroe County, Pennsylvania. It was in force for 55 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
Jan 22, 2021, 5:05 PM EST (22:05 UTC)
Expired
Jan 22, 2021, 6:00 PM EST
In force
55 min
Issued by
NWS Philadelphia/Mount Holly

Counties Sussex County, NJ, Carbon County, PA, Monroe County, PA

The radar

The Philadelphia radar (KDIX), 141 km from the middle of the area, began a volume at 22:07 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, 10.1 hours before the alert went out and 190 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 12:00Z on 2021-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2021-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
94 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

057 
WWUS81 KPHI 222205
SPSPHI

Special Weather Statement
National Weather Service Mount Holly NJ
505 PM EST Fri Jan 22 2021

NJZ001-007-008-PAZ054-055-061-062-222300-
Morris-Sussex-Warren-Lehigh-Monroe-Northampton-Carbon-
505 PM EST Fri Jan 22 2021

...A SNOW SQUALL WILL AFFECT NORTHERN MORRIS...SUSSEX...NORTHERN
WARREN...NORTHWESTERN LEHIGH...CARBON...MONROE AND NORTHERN
NORTHAMPTON COUNTIES...

At 502 PM EST, snow showers were located along a line extending from 
Matamoras to near Slabtown. Movement was southeast at 25 mph.

Visibilities may be locally reduced to less than a mile in the 
heaviest snow showers, and winds may gust to 30 mph. Accumulating 
snow is not expected.

Locations impacted include...
Newton, Lehighton, Montague, Mount Pocono, Hopatcong, East
Stroudsburg, Tobyhanna, Blairstown, Palmerton, Bangor, Franklin, Jim
Thorpe, Slatington, Pen Argyl, Nesquehoning, Hamburg, Wind Gap,
Weatherly, Ogdensburg and Sussex.

This includes the following highways...
 Northeast Extension between mile markers 69 and 97.
 Interstate 80 in Pennsylvania between mile markers 278 and 314.
 Interstate 80 in New Jersey between mile markers 0 and 15.
 Interstate 380 in Pennsylvania between mile markers 0 and 11.

Use extra caution if you must travel into or through these snow 
showers. Rapid changes in visibility and potentially slick roads are 
likely to lead to accidents. 

LAT...LON 4119 7438 4110 7449 4104 7450 4105 7444
      4104 7444 4068 7589 4074 7576 4091 7599
      4101 7573 4109 7577 4112 7564 4119 7557
      4124 7536 4125 7513 4115 7515 4114 7509
      4108 7503 4116 7490 4132 7479 4136 7470
TIME...MOT...LOC 2202Z 328DEG 23KT 4135 7472 4092 7637 

$$

MPS

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 22, 3:09 AM ESTGale WatchPHI12 hr
Jan 22, 3:35 PM ESTGale WarningPHI27 hr

Nearby

Special Weather Statements in Pennsylvania, 2021Special Weather Statements in New Jersey, 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.