Alert archive / Pennsylvania / Snow Squall Warnings in 2024
Snow Squall Warning 30, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Feb 17, 2024, 5:27 PM EST for 4 counties in Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 48 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 17, 2024, 5:27 PM EST (22:27 UTC)
- Expired
- Feb 17, 2024, 6:15 PM EST
- In force
- 48 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Damage threat
- Significant
Counties Hunterdon County, NJ, Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 105 km from the middle of the area, began a volume at 22:24 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 191 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
- 650 m above ground
- 0-6 km bulk shear
- 86 kt
- 0-1 km storm-relative helicity
- 225 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
060
WWUS51 KPHI 172227
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
527 PM EST Sat Feb 17 2024
NJC019-041-PAC025-077-089-095-172315-
/O.NEW.KPHI.SQ.W.0030.240217T2227Z-240217T2315Z/
Hunterdon NJ-Warren NJ-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
527 PM EST Sat Feb 17 2024
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Northwestern Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Northeastern Lehigh County in eastern Pennsylvania...
Southeastern Carbon County in northeastern Pennsylvania...
South central Monroe County in northeastern Pennsylvania...
Northampton County in eastern Pennsylvania...
* Until 615 PM EST.
* At 527 PM EST, a dangerous snow squall was located along a line
extending from East Bangor to Palmerton, moving southeast at 30
mph.
HAZARD...Flash freeze on roads. Intense bursts of heavy snow and
gusty winds leading to blowing snow and visibility
rapidly falling to less than one-quarter mile. Wind gusts
up to 35 mph.
SOURCE...Radar and webcams.
IMPACT...Dangerous and life-threatening travel conditions are
expected to develop rapidly in the warning area.
This includes the following highways...
Northeast Extension between mile markers 61 and 77.
Interstate 78 in Pennsylvania between mile markers 68 and 76.
Interstate 78 in New Jersey between mile markers 0 and 12.
Interstate 80 in Pennsylvania between mile markers 310 and 314.
Interstate 80 in New Jersey between mile markers 0 and 7.
Locations impacted include...
Allentown, Easton, Lehighton, Bethlehem, Forks, Northampton, East
Stroudsburg, Wilson, Washington, Nazareth, Palmerton, Bangor,
Slatington, High Bridge, Pen Argyl, Wind Gap, Bath, Belvidere,
Harmony, and Oxford.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Wet roadways will quickly freeze. Black ice will cause roads,
bridges, and overpasses to become slick and dangerous. Slow down and
be prepared for a sudden loss of traction.
Reduce speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
&&
LAT...LON 4080 7486 4079 7489 4074 7483 4073 7477
4057 7516 4058 7519 4061 7520 4058 7525
4064 7560 4082 7576 4100 7515
TIME...MOT...LOC 2227Z 310DEG 26KT 4090 7515 4079 7562
SNOW SQUALL...OBSERVED
SNOW SQUALL IMPACT...SIGNIFICANT
$$
MJL1 follow-up statement
958
WWUS51 KPHI 172306
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
606 PM EST Sat Feb 17 2024
NJC019-041-PAC025-077-089-095-172315-
/O.EXP.KPHI.SQ.W.0030.000000T0000Z-240217T2315Z/
Hunterdon NJ-Warren NJ-Lehigh PA-Carbon PA-Monroe PA-Northampton PA-
606 PM EST Sat Feb 17 2024
...THE SNOW SQUALL WARNING FOR NORTHWESTERN HUNTERDON...SOUTHWESTERN
WARREN...NORTHEASTERN LEHIGH...SOUTHEASTERN CARBON...SOUTH CENTRAL
MONROE AND NORTHAMPTON COUNTIES WILL EXPIRE AT 615 PM EST...
The snow squall that prompted the warning has weakened. Therefore,
the snow squall warning will be allowed to expire. Scattered light
snow showers will remain possible through tonight.
LAT...LON 4080 7486 4079 7489 4074 7483 4073 7477
4057 7516 4058 7519 4061 7520 4058 7525
4064 7560 4082 7576 4100 7515
TIME...MOT...LOC 2305Z 310DEG 26KT 4074 7491 4063 7538
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 12:46 AM EST | Special Weather Statement | PHI | Berks, Lehigh | 59 min |
| Feb 17, 2:02 AM EST | Special Weather Statement | PHI | Berks, Lehigh | 58 min |
| Feb 17, 2:08 PM EST | Snow Squall Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 37 min |
| Feb 17, 2:17 PM EST | Snow Squall Warning | PHI | Carbon, Monroe, Northampton | 28 min |
| Feb 17, 2:24 PM EST | Snow Squall Warning | PHI | Carbon, Monroe, Northampton | 21 min |
| Feb 17, 2:26 PM EST | Snow Squall Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 34 min |
| Feb 17, 2:42 PM EST | Snow Squall Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 33 min |
| Feb 17, 2:48 PM EST | Snow Squall Warning | PHI | Carbon, Monroe, Northampton | 27 min |
| Feb 17, 2:57 PM EST | Snow Squall Warning | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 33 min |
| Feb 17, 3:10 PM EST | Snow Squall Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 50 min |
| Feb 17, 3:17 PM EST | Snow Squall Warning | PHI | Monroe, Northampton | 43 min |
| Feb 17, 3:28 PM EST | Snow Squall Warning | PHI | Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton | 47 min |
| Feb 17, 3:31 PM EST | Snow Squall Warning | PHI | Berks | 44 min |
| Feb 17, 3:57 PM EST | Snow Squall Warning | PHI | Carbon, Monroe | 48 min |
| Feb 17, 4:09 PM EST | Snow Squall Warning | PHI | Lehigh, Northampton | 36 min |
| Feb 17, 4:14 PM EST | Snow Squall Warning | PHI | Bucks | 21 min |
| Feb 17, 4:16 PM EST | Snow Squall Warning | PHI | Berks, Bucks, Chester, Lehigh, Montgomery | 29 min |
| Feb 17, 4:44 PM EST | Snow Squall Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 46 min |
| Feb 17, 1:09 AM EST | Special Weather Statement | PHI | Middlesex | 66 min |
| Feb 17, 5:01 PM EST | Snow Squall Warning | PHI | Hunterdon, Morris, Warren | 29 min |
| Feb 17, 5:17 PM EST | Snow Squall Warning | PHI | Hunterdon, Morris, Somerset | 28 min |
Nearby
Snow Squall Warnings in Pennsylvania, 2024Snow Squall Warnings in New Jersey, 2024Every snow squall warning in 2024
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.