Alert archive / Pennsylvania / Snow Squall Warnings in 2020
Snow Squall Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this snow squall warning at Jan 8, 2020, 11:25 AM EST for Berks County, Pennsylvania. It was in force for 35 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 8, 2020, 11:25 AM EST (16:25 UTC)
- Expired
- Jan 8, 2020, 12:00 PM EST
- In force
- 35 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 153 km from the middle of the area, began a volume at 16:29 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, 4.4 hours before the alert went out and 196 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
- 1404 m above ground
- 0-6 km bulk shear
- 103 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 424 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
008
WWUS51 KPHI 081625
SQWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Mount Holly NJ
1125 AM EST Wed Jan 8 2020
PAC011-081700-
/O.NEW.KPHI.SQ.W.0008.200108T1625Z-200108T1700Z/
Berks PA-
1125 AM EST Wed Jan 8 2020
The National Weather Service in Mount Holly NJ has issued a
* Snow Squall Warning for...
Berks County in eastern Pennsylvania...
* Until noon EST.
* At 1125 AM EST, a dangerous snow squall was located over Bernville,
or 10 miles northeast of Myerstown, moving east at 55 mph.
HAZARD...Extremely poor visibility in heavy snow.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
* This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 10 and 25.
Pennsylvania Turnpike near exit 298.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
Locations impacted include...
Reading, Wyomissing, Birdsboro, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Newmanstown, Leesport,
Shoemakersville, Elverson, Bally, Bernville, Bechtelsville,
Strausstown, New Morgan, Spring Ridge, Fairview Hgts and Shillington.
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 4049 7643 4052 7635 4052 7625 4054 7617
4042 7556 4022 7573 4014 7587 4036 7621
TIME...MOT...LOC 1625Z 281DEG 50KT 4043 7613
$$
JEO2 follow-up statements
219
WWUS51 KPHI 081643
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
1143 AM EST Wed Jan 8 2020
PAC011-081700-
/O.CON.KPHI.SQ.W.0008.000000T0000Z-200108T1700Z/
Berks PA-
1143 AM EST Wed Jan 8 2020
...A SNOW SQUALL WARNING REMAINS IN EFFECT UNTIL NOON EST FOR BERKS
COUNTY...
At 1143 AM EST, a dangerous snow squall was located near Fleetwood,
or 7 miles northeast of Reading, moving east at 60 mph.
HAZARD...Extremely poor visibility in heavy snow.
SOURCE...Radar and webcams.
IMPACT...Dangerous life-threatening travel.
This includes the following highways...
Interstate 78 in Pennsylvania between mile markers 20 and 24.
Pennsylvania Turnpike near exit 298.
Interstate 176 in Pennsylvania between mile markers 1 and 11.
Locations impacted include...
Reading, Wyomissing, Birdsboro, Fleetwood, Sinking Spring,
Laureldale, Womelsdorf, Wernersville, Newmanstown, Leesport,
Shoemakersville, Elverson, Bally, Bernville, Bechtelsville,
Strausstown, New Morgan, Spring Ridge, Fairview Hgts and Shillington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4043 7632 4049 7620 4053 7614 4042 7556
4022 7573 4014 7587 4036 7621
TIME...MOT...LOC 1643Z 281DEG 50KT 4038 7580
$$
JEO697
WWUS51 KPHI 081655
SQWPHI
Snow Squall Warning
National Weather Service Mount Holly NJ
1155 AM EST Wed Jan 8 2020
PAC011-081705-
/O.EXP.KPHI.SQ.W.0008.000000T0000Z-200108T1700Z/
Berks PA-
1155 AM EST Wed Jan 8 2020
...THE SNOW SQUALL WARNING FOR BERKS COUNTY WILL EXPIRE AT NOON
EST...
The snow squall which prompted the warning has exited the area.
Therefore, the snow squall warning will be allowed to expire.
LAT...LON 4043 7632 4049 7620 4053 7614 4042 7556
4022 7573 4014 7587 4036 7621
TIME...MOT...LOC 1655Z 281DEG 50KT 4036 7567
$$
JEOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 8, 7:44 AM EST | Snow Squall Warning | PHI | Chester | 46 min |
| Jan 8, 7:49 AM EST | Snow Squall Warning | PHI | Carbon, Monroe, Northampton | 41 min |
| Jan 8, 8:28 AM EST | Snow Squall Warning | PHI | Berks, Bucks, Chester, Delaware, Montgomery | 47 min |
| Jan 8, 8:28 AM EST | Snow Squall Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 47 min |
| Jan 8, 8:30 AM EST | Snow Squall Warning | PHI | Monroe | 45 min |
| Jan 8, 12:07 PM EST | Special Weather Statement | PHI | Montgomery | 23 min |
| Jan 8, 12:38 PM EST | Special Weather Statement | PHI | Montgomery, Philadelphia | 37 min |
| Jan 8, 12:49 PM EST | Snow Squall Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 26 min |
| Jan 8, 1:48 PM EST | Snow Squall Warning | PHI | Carbon, Monroe | 42 min |
| Jan 8, 2:05 PM EST | Special Weather Statement | PHI | Montgomery | 25 min |
| Jan 8, 2:32 PM EST | Special Weather Statement | PHI | Carbon, Northampton | 28 min |
| Jan 8, 2:33 PM EST | Special Weather Statement | PHI | Philadelphia | 27 min |
| Jan 8, 2:46 PM EST | Special Weather Statement | PHI | Berks | 44 min |
| Jan 8, 3:05 PM EST | Special Weather Statement | PHI | Northampton | 40 min |
Nearby
Snow Squall Warnings in Pennsylvania, 2020Every snow squall warning in 2020
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.