Alert archive / Pennsylvania / Snow Squall Warnings in 2024

Snow Squall Warning 2, NWS Philadelphia/Mount Holly

January 14, 2024Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this snow squall warning at Jan 14, 2024, 10:43 AM EST for Berks County, Pennsylvania. It was in force for 47 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 14, 2024, 10:43 AM EST (15:43 UTC)
Expired
Jan 14, 2024, 11:30 AM EST
In force
47 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 127 km from the middle of the area, began a volume at 15:42 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.7 hours before the alert went out and 211 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, Washington/Dulle, VA at 12:00Z on 2024-01-14Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2024-01-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.1939587897117136156175Sfc1 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
1565 m above ground
0-6 km bulk shear
92 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

885 
WWUS51 KPHI 141543
SQWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
1043 AM EST Sun Jan 14 2024

PAC011-141630-
/O.NEW.KPHI.SQ.W.0002.240114T1543Z-240114T1630Z/
Berks PA-
1043 AM EST Sun Jan 14 2024

The National Weather Service in Mount Holly NJ has issued a

* Snow Squall Warning for...
  Eastern Berks County in eastern Pennsylvania...

* Until 1130 AM EST.

* At 1043 AM EST, a dangerous snow squall was located along a line
  extending from near Fleetwood to Adamstown, moving east at 50 mph.

  HAZARD...Intense bursts of heavy snow and gusty winds leading to 
           blowing snow and rapidly falling visibility. Wind gusts 
           greater than 35 mph.

  SOURCE...Radar and webcams.

  IMPACT...Travel will become difficult and potentially dangerous 
           within minutes.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 296 and 299.
 Interstate 78 in Pennsylvania between mile markers 42 and 44.
 Interstate 176 in Pennsylvania between mile markers 1 and 11.

Locations impacted include...
Reading, Wyomissing, Birdsboro, Kutztown, Fleetwood, Sinking Spring,
Laureldale, Wernersville, Topton, Bally, Bechtelsville, Lyons, New
Morgan, Spring Ridge, Shillington, West Reading, Boyertown, Mount
Penn, Mohnton, and Kenhorst.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow Down! Rapid changes in visibility and road conditions are
expected with this dangerous snow squall. Be alert for sudden
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 4060 7577 4045 7553 4025 7569 4014 7587
      4030 7612
TIME...MOT...LOC 1543Z 248DEG 44KT 4043 7579 4022 7605 

SNOW SQUALL...OBSERVED

$$

MJL
1 follow-up statement
358 
WWUS51 KPHI 141631
SQWPHI

Snow Squall Warning
National Weather Service Mount Holly NJ
1131 AM EST Sun Jan 14 2024

PAC011-141641-
/O.EXP.KPHI.SQ.W.0002.000000T0000Z-240114T1630Z/
Berks PA-
1131 AM EST Sun Jan 14 2024

...THE SNOW SQUALL WARNING FOR EASTERN BERKS COUNTY HAS EXPIRED...

The snow squall that prompted the warning has exited the area.
Therefore, the snow squall warning has been allowed to expire. Areas 
of blowing snow will continue to make travel difficult. Heed any 
additional snow squall warnings.

LAT...LON 4060 7577 4045 7553 4025 7569 4014 7587
      4030 7612
TIME...MOT...LOC 1631Z 270DEG 44KT 4058 7513 4037 7540 

$$

MJL

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 14, 2:48 AM ESTWind AdvisoryPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more15 hr
Jan 14, 10:28 AM ESTSnow Squall Warning Significant damage threatPHICarbon, Monroe62 min
Jan 14, 11:07 AM ESTSnow Squall WarningPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton38 min
Jan 14, 11:30 AM ESTSnow Squall Warning Significant damage threatPHICarbon, Monroe60 min
Jan 14, 11:42 AM ESTSnow Squall Warning Significant damage threatPHIBerks, Chester, Montgomery48 min
Jan 14, 11:44 AM ESTSnow Squall WarningPHIBucks61 min
Jan 14, 11:57 AM ESTSnow Squall WarningPHIChester48 min
Jan 14, 12:17 PM ESTSnow Squall WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia28 min
Jan 14, 12:24 PM ESTSnow Squall Warning Significant damage threatPHIMonroe28 min
Jan 14, 12:28 PM ESTSnow Squall WarningPHIChester20 min

Nearby

Snow Squall Warnings in Pennsylvania, 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.