Alert archive / Pennsylvania / Freezing Rain Advisories in 2012

Freezing Rain Advisory 5, NWS Philadelphia/Mount Holly

December 20, 2012Carbon County, Monroe County, Pennsylvania

NWS Philadelphia/Mount Holly issued this freezing rain advisory at Dec 20, 2012, 5:34 PM EST for Carbon County, Monroe County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Dec 20, 2012, 5:34 PM EST (22:34 UTC)
Expired: Dec 20, 2012, 9:00 PM EST
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly

Counties Carbon County, PA, Monroe County, PA

The radar

The Binghamton radar (KBGM), 140 km from the middle of the area, began a volume at 22:36 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.6 hours before the alert went out and 176 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1103 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

961 
WWUS41 KPHI 202234
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
534 PM EST THU DEC 20 2012

PAZ054-055-210400-
/O.NEW.KPHI.ZR.Y.0005.121220T2234Z-121221T0400Z/
CARBON-MONROE-
INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG
534 PM EST THU DEC 20 2012

...FREEZING RAIN ADVISORY IN EFFECT UNTIL 11 PM EST THIS
EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FREEZING
RAIN ADVISORY...WHICH IS IN EFFECT UNTIL 11 PM EST THIS EVENING.

* LOCATIONS...HIGHER ELEVATIONS IN CARBON AND MONROE
  COUNTIES...MAINLY ABOVE 1200 FEET.

* HAZARD TYPES...LIGHT FREEZING RAIN.

* ICE ACCUMULATIONS...A FEW HUNDREDTHS OF AN INCH POSSIBLE.

* TIMING...THROUGH LATE THIS EVENING.

* IMPACTS...A LIGHT COATING OF ICE IS EXPECTED ON COLDER
  SURFACES...THIS MAY INCLUDE TRAVEL SURFACES.

* WINDS...SOUTHEAST 10 TO 20 MPH WITH GUSTS UP TO 25 MPH.

* TEMPERATURES...UPPER 20S TO LOW 30S.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZING RAIN ADVISORY MEANS THAT PERIODS OF FREEZING RAIN OR
FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE DRIVING.

&&

$$

HEAVENER

1 follow-up statement

369 
WWUS41 KPHI 210200
WSWPHI

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
900 PM EST THU DEC 20 2012

PAZ054-055-210400-
/O.CAN.KPHI.ZR.Y.0005.000000T0000Z-121221T0400Z/
/O.NEW.KPHI.WW.Y.0007.121221T0200Z-121221T0400Z/
CARBON-MONROE-
INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG
900 PM EST THU DEC 20 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM EST THIS
EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A WINTER
WEATHER ADVISORY FOR SPOTTY FREEZING RAIN CHANGING OVER TO ALL SNOW...WHICH
IS IN EFFECT UNTIL 11 PM EST THIS EVENING. 

* ACCUMULATIONS...SNOW ACCUMULATION OF UP TO 1 INCH...ALONG WITH 
  AROUND A TRACE OF ICE.

* LOCATIONS...HIGHER ELEVATIONS IN CARBON AND MONROE COUNTIES... 
  MAINLY ABOVE 1200 FEET.

* HAZARD TYPES...LIGHT FREEZING RAIN CHANGING OVER TO ALL SNOW SHORTLY.

* ICE ACCUMULATIONS...AROUND A TRACE.

* SNOW ACCUMULATIONS...UP TO 1 INCH.

* TIMING...FOR THE NEXT COUPLE OF HOURS.

* IMPACTS...A LIGHT COATING OF ICE HAS DEVELOPED ON SOME AREA
  ROADWAYS THIS EVENING. THE LIGHT FREEZING RAIN WILL COME TO AN
  END SHORTLY AND CHANGE OVER TO ALL SNOW WHICH WILL COVER THE
  ROADWAYS AND ANY OTHER UNTREATED SURFACES. VISIBILITIES IN THE
  SNOW WILL BE REDUCED TO LESS THAN 1 MILE.

* WINDS...SOUTHEAST 10 TO 15 MPH.

* TEMPERATURES...IN THE LOW TO MID 30S.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

HEAVENER

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 20, 3:25 PM EST	Coastal Flood Advisory	PHI	Delaware, Philadelphia	25 hr

Nearby

Freezing Rain Advisories in Pennsylvania, 2012 Every freezing rain advisory in 2012

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.