Alert archive / New Jersey / Snow Squall Warnings in 2019
Snow Squall Warning 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Jan 30, 2019, 2:05 PM EST for 8 counties in New Jersey; 8 counties in Pennsylvania; New Castle County, Delaware. 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 30, 2019, 2:05 PM EST (19:05 UTC)
- Expired
- Jan 30, 2019, 3:00 PM EST
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Salem County, NJ, Somerset County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 75 km from the middle of the area, began a volume at 19:09 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, 7.1 hours before the alert went out and 214 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
- 920 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- -173 m²/s²
- 0-3 km storm-relative helicity
- 111 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
083
WWUS51 KPHI 301909
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service Baltimore MD/Washington DC
205 PM EST Wed Jan 30 2019
DEC003-NJC005-007-015-019-021-033-035-041-PAC011-017-029-045-077-091-
095-101-302000-
/O.NEW.KPHI.SQ.W.0001.190130T1905Z-190130T2000Z/
New Castle DE-Camden NJ-Warren NJ-Mercer NJ-Somerset NJ-Salem NJ-
Hunterdon NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Berks PA-
Lehigh PA-Bucks PA-Chester PA-Philadelphia PA-Delaware PA-
Northampton PA-
205 PM EST Wed Jan 30 2019
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Northern New Castle County in northern Delaware...
Northwestern Camden County in southern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Northwestern Mercer County in central New Jersey...
Southwestern Somerset County in northern New Jersey...
Northwestern Salem County in southern New Jersey...
Hunterdon County in northwestern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Northwestern Burlington County in southern New Jersey...
Montgomery County in southeastern Pennsylvania...
Southeastern Berks County in eastern Pennsylvania...
Eastern Lehigh County in eastern Pennsylvania...
Bucks County in southeastern Pennsylvania...
Chester County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
Southwestern Northampton County in eastern Pennsylvania...
* Until 300 PM EST.
* At 205 PM EST, a dangerous snow squall was located along a line
extending from near Erwinna to Greenville, moving east at 20 mph.
HAZARD...Whiteout conditions. Zero visibility in snow and blowing
snow. Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
This will impact portions of Interstate 76, 476, 676, 78, 95, 295
and U.S. routes 22 and 30 and state routes 422, 700
Locations impacted include... Philadelphia, Allentown, Trenton,
Camden, Wilmington, Newark, Easton, West Chester, Somerville,
Gloucester City, Bethlehem, Bensalem, Bridgewater, Ewing,
Norristown, Chester, Deptford, Pottstown, West Deptford and
Glassboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
There is no safe place on a highway when a snow squall hits.
Visibility and traction are immediately lost in whiteout conditions,
making it difficult or impossible to slow down and avoid stopped
vehicles. Delay travel or safely exit the highway before the snow
squall arrives.
Wet roadways will quickly freeze after passage of the snow squall.
Black ice will cause untreated roads, bridges and overpasses to
become slick and dangerous. Slow down and be prepared for sudden
loss of traction.
&&
LAT...LON 3963 7520 3975 7606 4077 7554 4070 7484
4059 7457
TIME...MOT...LOC 1905Z 277DEG 19KT 4048 7504 3977 7564
$$
SMZ1 follow-up statement
014
WWUS51 KPHI 301928
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
Issued by National Weather Service Baltimore MD/Washington DC
226 PM EST Wed Jan 30 2019
PAC011-077-301936-
/O.CAN.KPHI.SQ.W.0001.000000T0000Z-190130T2000Z/
Berks PA-Lehigh PA-
226 PM EST Wed Jan 30 2019
...THE SNOW SQUALL WARNING FOR SOUTHEASTERN BERKS AND EASTERN LEHIGH
COUNTIES IS CANCELLED...
The snow squall which prompted the warning has moved out of the
warned area. Therefore, the snow squall warning has been cancelled.
LAT...LON 3963 7520 3970 7571 4071 7516 4059 7457
TIME...MOT...LOC 1926Z 277DEG 19KT 4047 7491 3976 7551
$$
DEC003-NJC005-007-015-019-021-033-035-041-PAC017-029-045-091-095-101-
302000-
/O.CON.KPHI.SQ.W.0001.000000T0000Z-190130T2000Z/
New Castle DE-Camden NJ-Warren NJ-Mercer NJ-Somerset NJ-Salem NJ-
Hunterdon NJ-Gloucester NJ-Burlington NJ-Montgomery PA-Bucks PA-
Chester PA-Philadelphia PA-Delaware PA-Northampton PA-
226 PM EST Wed Jan 30 2019
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL 300 PM EST FOR
NORTHERN NEW CASTLE...NORTHWESTERN CAMDEN...SOUTHWESTERN WARREN...
NORTHWESTERN MERCER...SOUTHWESTERN SOMERSET...NORTHWESTERN SALEM...
HUNTERDON...NORTHWESTERN GLOUCESTER...NORTHWESTERN BURLINGTON...
MONTGOMERY...BUCKS...SOUTHEASTERN CHESTER...PHILADELPHIA...DELAWARE
AND SOUTH CENTRAL NORTHAMPTON COUNTIES...
At 226 PM EST, a dangerous snow squall was located along a line
extending from Sand Brook to near Wilmington, moving east at 20 mph.
HAZARD...Whiteout conditions. Zero visibility in snow and blowing
snow. Wind gusts greater than 30 mph.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
This will impact portions of Interstate 76, 276, 476, 676, 78, 95,
295 and state routes 23, 700
Locations impacted include...
Philadelphia, Trenton, Camden, Wilmington, Somerville, Gloucester
City, Bensalem, Bridgewater, Ewing, Norristown, Chester, Deptford,
West Deptford, Glassboro, Lansdale, West Norriton, East Norriton,
Pennsville, Bellmawr and Yeadon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
There is no safe place on a highway when a snow squall hits.
Visibility and traction are immediately lost in whiteout conditions,
making it difficult or impossible to slow down and avoid stopped
vehicles. Delay travel or safely exit the highway before the snow
squall arrives.
Wet roadways will quickly freeze. Black ice will cause untreated
roads, bridges and overpasses to become slick and dangerous. Slow
down and be prepared for sudden loss of traction.
&&
LAT...LON 3963 7520 3970 7571 4071 7516 4059 7457
TIME...MOT...LOC 1926Z 277DEG 19KT 4047 7491 3976 7551
$$
SMZThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 29, 9:08 PM EST | Wind Chill Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 37 hr |
| Jan 30, 3:32 AM EST | Wind Advisory | PHI | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more | 17 hr |
| Jan 30, 1:08 PM EST | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 82 min |
| Jan 30, 2:04 PM EST | Special Weather Statement | PHI | Burlington, Camden, Gloucester, Salem | 3 hr |
| Jan 30, 2:12 PM EST | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 3 hr |
| Jan 30, 2:21 PM EST | Snow Squall Warning | PHI | Hunterdon, Middlesex, Morris, Passaic, Somerset, Sussex and 1 more | 54 min |
| Jan 30, 2:42 PM EST | Snow Squall Warning | PHI | Atlantic, Burlington, Camden, Gloucester, Hunterdon, Mercer and 4 more | 93 min |
| Jan 30, 5:00 PM EST | Heavy Freezing Spray Advisory | PHI | 17 hr | |
| Jan 30, 5:51 AM EST | Wind Chill Warning | PHI | Carbon, Monroe | 34 hr |
| Jan 30, 11:50 AM EST | Special Weather Statement | PHI | Berks | 55 min |
| Jan 30, 12:32 PM EST | Special Weather Statement | PHI | Bucks, Carbon, Chester, Lehigh, Monroe, Montgomery and 1 more | 58 min |
| Jan 30, 1:24 PM EST | Special Weather Statement | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jan 30, 1:37 PM EST | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 113 min |
Nearby
Snow Squall Warnings in New Jersey, 2019Snow Squall Warnings in Pennsylvania, 2019Snow Squall Warnings in Delaware, 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.