Alert archive / Pennsylvania / Winter Weather Advisories in 2012
Winter Weather Advisory 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this winter weather advisory at Dec 20, 2012, 9:00 PM EST for Carbon County, Monroe County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Dec 20, 2012, 9:00 PM EST (02:00 UTC)
- Expired
- Dec 20, 2012, 11:00 PM EST
- In force
- 2 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 02:03 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 00:00Z, 2.0 hours before the alert went out and 224 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
- 3 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 671 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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. && $$ HEAVENER
1 follow-up statement
153 WWUS41 KPHI 210404 WSWPHI URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1104 PM EST THU DEC 20 2012 PAZ054-055-210515- /O.EXP.KPHI.WW.Y.0007.000000T0000Z-121221T0400Z/ CARBON-MONROE- INCLUDING THE CITIES OF...JIM THORPE...STROUDSBURG 1104 PM EST THU DEC 20 2012 ...WINTER WEATHER ADVISORY HAS EXPIRED... TEMPERATURES ACROSS THE REGION HAVE RISEN ABOVE FREEZING AND WILL REMAIN SO FOR THE REST OF TONIGHT. SNOW HAS CHANGED OVER TO RAIN. THEREFORE THE WINTER WEATHER HAS BEEN ALLOWED TO EXPIRE. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 9:11 PM EST | Wind Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 12 hr |
| Dec 21, 12:27 AM EST | Coastal Flood Warning | PHI | Delaware, Philadelphia | 11 hr |
| Dec 21, 4:44 AM EST | Areal Flood Warning | PHI | Chester, Montgomery | 14 hr |
| Dec 21, 5:17 AM EST | Areal Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 5:39 AM EST | Areal Flood Warning | PHI | Bucks | 10 hr |
| Dec 21, 7:15 AM EST | River Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 7:36 AM EST | Areal Flood Warning | PHI | Monroe, Northampton | 15 hr |
| Dec 21, 7:49 AM EST | Areal Flood Warning | PHI | Philadelphia | 11 hr |
| Dec 21, 9:24 AM EST | Areal Flood Warning | PHI | Delaware | 4 hr |
| Dec 21, 9:36 AM EST | River Flood Warning | PHI | Bucks | 10 hr |
| Dec 21, 12:08 PM EST | River Flood Warning | PHI | Chester, Delaware | 5 hr |
| Dec 21, 3:16 PM EST | Wind Advisory | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 27 hr |
Nearby
Winter Weather Advisories in Pennsylvania, 2012Every winter weather 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.