Alert archive / Pennsylvania / Snow Squall Warnings in 2019
Snow Squall Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Feb 13, 2019, 12:37 PM EST for 5 counties in Pennsylvania; 4 counties in New Jersey. It was in force for 53 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
- Feb 13, 2019, 12:37 PM EST (17:37 UTC)
- Expired
- Feb 13, 2019, 1:30 PM EST
- In force
- 53 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 97 km from the middle of the area, began a volume at 17:36 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, 5.6 hours before the alert went out and 179 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
- 414 m above ground
- 0-6 km bulk shear
- 104 kt
- 0-1 km storm-relative helicity
- -312 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
654
WWUS51 KPHI 131741
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
1237 PM EST Wed Feb 13 2019
NJC019-027-037-041-PAC011-017-077-091-095-131830-
/O.NEW.KPHI.SQ.W.0004.190213T1737Z-190213T1830Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Warren NJ-Berks PA-Montgomery PA-
Lehigh PA-Bucks PA-Northampton PA-
1237 PM EST Wed Feb 13 2019
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Morris County in northern New Jersey...
Northern Hunterdon County in northwestern New Jersey...
South central Sussex County in northwestern New Jersey...
Warren County in northwestern New Jersey...
Northeastern Berks County in eastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
Southeastern Lehigh County in eastern Pennsylvania...
Northwestern Bucks County in southeastern Pennsylvania...
Southern Northampton County in eastern Pennsylvania...
* Until 130 PM EST.
* At 1237 PM EST, a dangerous snow squall was located along a line
extending from near Great Meadows-Vienna to near Bethlehem to
Leesport, moving east at 30 mph.
HAZARD...Poor visibility in heavy snow.
SOURCE...Radar and spotters.
IMPACT...Dangerous life-threatening travel.
* Visibility reduced to a quarter mile or less has been reported
with this snow squall in Northampton and Lehigh counties.
Temperatures are above freezing, however they may quickly drop to
freezing during the burst of snow resulting in icy conditions on
untreated roads.
Locations impacted include...
Allentown, Easton, Morristown, Bethlehem, Dover, Hopatcong, Forks,
Emmaus, Lincoln Park, Northampton, Hackettstown, Quakertown, Boonton,
Wilson, Wharton, Washington, Rockaway, Hellertown, Nazareth and
Morris Plains.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
Slow Down! Rapid changes in visibility and road conditions are
expected with this dangerous snow squall. Be alert for sudden
whiteout conditions.
&&
LAT...LON 4070 7540 4098 7492 4095 7428 4093 7428
4075 7455 4073 7471 4064 7473 4058 7481
4031 7549 4045 7614
TIME...MOT...LOC 1737Z 277DEG 24KT 4092 7490 4064 7532 4046 7595
$$
Gorse1 follow-up statement
983
WWUS51 KPHI 131804
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
103 PM EST Wed Feb 13 2019
NJC019-027-037-041-PAC011-017-077-091-095-131830-
/O.CON.KPHI.SQ.W.0004.000000T0000Z-190213T1830Z/
Morris NJ-Hunterdon NJ-Sussex NJ-Warren NJ-Berks PA-Montgomery PA-
Lehigh PA-Bucks PA-Northampton PA-
103 PM EST Wed Feb 13 2019
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 130 PM EST FOR
MORRIS...NORTHERN HUNTERDON...SOUTH CENTRAL SUSSEX...SOUTHERN
WARREN...EAST CENTRAL BERKS...NORTHWESTERN MONTGOMERY...SOUTHEASTERN
LEHIGH...NORTHWESTERN BUCKS AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 103 PM EST, a dangerous snow squall was located along a line
extending from Wharton to near Bloomsbury to near Bally, moving east
at 35 mph.
HAZARD...Poor visibility in heavy snow.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
Visibility reduced to a quarter mile or less has been reported with
this snow squall earlier in Northampton and Lehigh counties.
Temperatures are above freezing, however they may quickly drop to
freezing in some areas during the burst of snow resulting in icy
conditions on untreated roads.
Locations impacted include...
Morristown, Dover, Hopatcong, Emmaus, Lincoln Park, Hackettstown,
Quakertown, Boonton, Wharton, Washington, Rockaway, Hellertown,
Morris Plains, Mount Arlington, Mendham, Mountain Lakes, High Bridge,
Stanhope, Netcong and East Greenville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
Slow Down! Rapid changes in visibility and road conditions are
expected with this dangerous snow squall. Be alert for sudden
whiteout conditions.
&&
LAT...LON 4064 7519 4097 7478 4095 7428 4093 7428
4075 7455 4073 7471 4064 7473 4058 7481
4031 7549 4042 7579
TIME...MOT...LOC 1803Z 274DEG 28KT 4091 7458 4063 7500 4045 7563
$$
GorseThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 2:52 PM EST | Special Weather Statement | PHI | Bucks | 38 min |
| Feb 13, 1:22 PM EST | Special Weather Statement | PHI | Hunterdon, Middlesex, Morris, Somerset | 23 min |
| Feb 13, 3:28 PM EST | Special Weather Statement | PHI | Hunterdon, Middlesex, Somerset | 32 min |
| Feb 13, 3:59 PM EST | Special Weather Statement | PHI | Morris, Warren | 31 min |
| Feb 13, 4:28 PM EST | Special Weather Statement | PHI | Morris | 32 min |
| Feb 13, 6:20 PM EST | Small Craft Advisory | PHI | 15 hr |
Nearby
Snow Squall Warnings in Pennsylvania, 2019Snow Squall Warnings in New Jersey, 2019Every snow squall warning in 2019
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.