Alert archive / Pennsylvania / Snow Squall Warnings in 2018
Snow Squall Warning 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Nov 21, 2018, 5:28 PM EST for Carbon County, Monroe County, Northampton County, Pennsylvania; Morris County, Sussex County, Warren County, New Jersey. It was in force for 62 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
- Nov 21, 2018, 5:28 PM EST (22:28 UTC)
- Expired
- Nov 21, 2018, 6:30 PM EST
- In force
- 62 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Carbon County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 115 km from the middle of the area, began a volume at 22:31 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, 10.5 hours before the alert went out and 166 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1210 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
948
WWUS51 KPHI 212230
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
528 PM EST Wed Nov 21 2018
NJC027-037-041-PAC025-089-095-212330-
/O.NEW.KPHI.SQ.W.0002.181121T2228Z-181121T2330Z/
Morris NJ-Sussex NJ-Warren NJ-Carbon PA-Monroe PA-Northampton PA-
528 PM EST Wed Nov 21 2018
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Morris County in northern New Jersey...
Southern Sussex County in northwestern New Jersey...
Warren County in northwestern New Jersey...
Carbon County in northeastern Pennsylvania...
Southern Monroe County in northeastern Pennsylvania...
Northern Northampton County in eastern Pennsylvania...
* Until 630 PM EST.
* At 528 PM EST, a dangerous snow squall was located along a line
extending from Monsey to Poughkeepsie--Newburgh to near Lake Mohawk
to near Blairstown to near Columbia to near White Haven, moving
southeast at 30 mph.
HAZARD...Extremely poor visibility in heavy snow. Wind gusts up to
30 mph.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
* This will impact the Interstate 80 corridor, with temperatures
quickly dropping to near freezing with the burst of snow. Traffic
cameras in the Poconos showed a rapid snow accumulation on the
roads, therefore the greatest impacts will be where the
temperatures drop to near freezing.
Locations impacted include...
Morristown, Newton, Lehighton, Dover, Madison, Hopatcong, Florham
Park, East Hanover, Lincoln Park, Kinnelon, East Stroudsburg,
Hackettstown, Boonton, Butler, Wharton, Rockaway, Blairstown, Morris
Plains, Palmerton and Bangor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4091 7433 4083 7433 4077 7437 4076 7474
4077 7486 4078 7488 4077 7491 4081 7588
4091 7599 4101 7573 4107 7577 4102 7521
4105 7499 4112 7475 4112 7447 4104 7450
4105 7445 4102 7443 4100 7430 4090 7427
TIME...MOT...LOC 2228Z 321DEG 26KT 4113 7406 4109 7435 4104 7470 4100
7493 4093 7515 4101 7579
$$
Gorse2 follow-up statements
063
WWUS51 KPHI 212309
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
607 PM EST Wed Nov 21 2018
NJC037-212317-
/O.CAN.KPHI.SQ.W.0002.000000T0000Z-181121T2330Z/
Sussex NJ-
607 PM EST Wed Nov 21 2018
...THE SNOW SQUALL WARNING FOR SOUTHERN SUSSEX COUNTY IS CANCELLED...
The snow squall which prompted the warning has moved out of the
warned area. Therefore, the snow squall warning has been cancelled.
LAT...LON 4090 7427 4090 7433 4083 7433 4077 7437
4076 7474 4077 7486 4078 7488 4077 7491
4081 7588 4091 7599 4088 7519 4091 7472
4090 7471 4091 7467 4094 7428
TIME...MOT...LOC 2307Z 321DEG 26KT 4092 7384 4088 7412 4083 7447 4079
7470 4072 7492 4080 7556
$$
NJC027-041-PAC025-089-095-212330-
/O.CON.KPHI.SQ.W.0002.000000T0000Z-181121T2330Z/
Morris NJ-Warren NJ-Carbon PA-Monroe PA-Northampton PA-
607 PM EST Wed Nov 21 2018
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 630 PM EST FOR
CENTRAL MORRIS...CENTRAL WARREN...SOUTHERN CARBON...SOUTH CENTRAL
MONROE AND NORTHERN NORTHAMPTON COUNTIES...
At 607 PM EST, a dangerous snow squall was located along a line
extending from Bronxville to Passaic to Morris Plains to Chester to
Glen Gardner to Danielsville, moving southeast at 30 mph.
HAZARD...Extremely poor visibility heavy snow. Wind gusts up to 30
mph.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
The greatest impacts will be where the temperatures drop to near
freezing associated with a burst of snow.
Locations impacted include...
Morristown, Lehighton, Dover, Madison, Florham Park, East Hanover,
Lincoln Park, Hackettstown, Boonton, Wharton, Rockaway, Morris
Plains, Palmerton, Bangor, Mount Arlington, Mendham, Jim Thorpe,
Mountain Lakes, Stanhope and Pen Argyl.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4090 7427 4090 7433 4083 7433 4077 7437
4076 7474 4077 7486 4078 7488 4077 7491
4081 7588 4091 7599 4088 7519 4091 7472
4090 7471 4091 7467 4094 7428
TIME...MOT...LOC 2307Z 321DEG 26KT 4092 7384 4088 7412 4083 7447 4079
7470 4072 7492 4080 7556
$$
Gorse762
WWUS51 KPHI 212323
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
623 PM EST Wed Nov 21 2018
NJC027-041-PAC025-089-095-212333-
/O.EXP.KPHI.SQ.W.0002.000000T0000Z-181121T2330Z/
Morris NJ-Warren NJ-Carbon PA-Monroe PA-Northampton PA-
623 PM EST Wed Nov 21 2018
...THE SNOW SQUALL WARNING FOR CENTRAL MORRIS...CENTRAL WARREN...
SOUTHERN CARBON...SOUTH CENTRAL MONROE AND NORTHERN NORTHAMPTON
COUNTIES WILL EXPIRE AT 630 PM EST...
The snow squall which prompted the warning continues to exit the
area. Therefore, the snow squall warning will be allowed to expire.
LAT...LON 4090 7427 4090 7433 4083 7433 4077 7437
4076 7474 4077 7486 4078 7488 4077 7491
4081 7588 4091 7599 4088 7519 4091 7472
4090 7471 4091 7467 4094 7428
TIME...MOT...LOC 2323Z 321DEG 26KT 4085 7376 4081 7404 4076 7439 4072
7462 4065 7484 4073 7548
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 4:24 PM EST | Snow Squall Warning | PHI | Carbon, Monroe | 66 min |
| Nov 21, 6:22 PM EST | Special Weather Statement | PHI | Northampton | 53 min |
Nearby
Snow Squall Warnings in Pennsylvania, 2018Snow Squall Warnings in New Jersey, 2018Every snow squall warning in 2018
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.