Alert archive / Pennsylvania / Lake Effect Snow Warnings in 2017
Lake Effect Snow Warning 2, NWS State College, PA
NWS State College, PA issued this lake effect snow warning at Dec 11, 2017, 12:02 PM EST for Warren County, Pennsylvania. It took effect at Dec 12, 2017, 7:00 AM EST. It was in force for 30 hr. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 11, 2017, 12:02 PM EST (17:02 UTC)
- In effect from
- Dec 12, 2017, 7:00 AM EST
- Expired
- Dec 13, 2017, 1:00 PM EST
- In force
- 30 hr
- Issued by
- NWS State College, PA
County Warren County, PA
The radar
The Buffalo radar (KBUF), 134 km from the middle of the area, began a volume at 17:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 12, 7:00 AM EST | SNOW 2 | 4 Sse Sugar Grove, PA | CO-OP OBSERVER STATION CVWP1, CHANDLERS VALLEY 1SE. |
| Dec 12, 7:00 AM EST | SNOW 2.8 | 1 Ne Warren, PA | CO-OP OBSERVER STATION WRRP1, WARREN. |
| Dec 12, 7:00 AM EST | SNOW 4 | 2 Se Russell, PA | MESONET STATION KZAP1, KINZUA. |
| Dec 12, 8:30 PM EST | SNOW 5 | Chandlers Valley, PA | |
| Dec 13, 8:00 AM EST | HEAVY SNOW 15.2 | Bear Lake, PA | 9 INCHES OVERNIGHT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.0 hours before the alert went out and 133 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
- 565 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
114 WWUS41 KCTP 111702 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 1202 PM EST Mon Dec 11 2017 PAZ004-120300- /O.UPG.KCTP.WS.A.0001.171212T0000Z-171213T2100Z/ /O.NEW.KCTP.LE.W.0001.171212T1200Z-171213T1800Z/ Warren- Including the city of Warren 1202 PM EST Mon Dec 11 2017 ...LAKE EFFECT SNOW WARNING IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...Heavy lake effect snow expected. Travel will become very difficult Tuesday into Wednesday. Total snow accumulations of 10 to 15 inches are expected, with localized amounts up to 18 inches over extreme northwest Warren County. * WHERE...Warren County. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-024-033-120300- /O.EXB.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ Clearfield-Cambria-Somerset- Including the cities of DuBois, Clearfield, Johnstown, and Somerset 1202 PM EST Mon Dec 11 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...4 to 8 inches of snow expected...with locally higher amounts possible. Plan on difficult travel conditions. * WHERE...Clearfield, Cambria and Somerset Counties. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow late Tuesday into Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-120300- /O.EXT.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 1202 PM EST Mon Dec 11 2017 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...Lake effect snow expected. Plan on difficult travel conditions. Total snow accumulations of 4 to 8 inches, with localized higher amounts possible. * WHERE...McKean and Elk Counties. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow late Tuesday into Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ DeVoir
6 follow-up statements
487 WWUS41 KCTP 120234 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 934 PM EST Mon Dec 11 2017 PAZ004-121045- /O.CON.KCTP.LE.W.0001.171212T1200Z-171213T1800Z/ Warren- Including the city of Warren 934 PM EST Mon Dec 11 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...Heavy lake effect snow expected. Travel will become very difficult Tuesday into Wednesday. Total snow accumulations of 10 to 15 inches are expected, with localized amounts up to 18 inches over extreme northwest Warren County. * WHERE...Warren County. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-024-033-121045- /O.CON.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ Clearfield-Cambria-Somerset- Including the cities of DuBois, Clearfield, Johnstown, and Somerset 934 PM EST Mon Dec 11 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...4 to 8 inches of snow expected...with locally higher amounts possible. Plan on difficult travel conditions. * WHERE...Clearfield, Cambria and Somerset Counties. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow late Tuesday into Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-121045- /O.CON.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 934 PM EST Mon Dec 11 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 AM TUESDAY TO 1 PM EST WEDNESDAY... * WHAT...Lake effect snow expected. Plan on difficult travel conditions. Total snow accumulations of 4 to 8 inches, with localized higher amounts possible. * WHERE...McKean and Elk Counties. * WHEN...From 7 AM Tuesday to 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 35 mph will cause areas of blowing and drifting snow late Tuesday into Wednesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$
800 WWUS41 KCTP 121015 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 515 AM EST Tue Dec 12 2017 PAZ004-121815- /O.CON.KCTP.LE.W.0001.171212T1200Z-171213T1800Z/ Warren- Including the city of Warren 515 AM EST Tue Dec 12 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Heavy lake effect snow expected. Plan on difficult travel conditions. Total snow accumulations of 8 to 12 inches, with localized amounts up to 16 inches, are expected. * WHERE...Warren County. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 40 mph will cause areas of blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-024-033-121815- /O.CON.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ Clearfield-Cambria-Somerset- Including the cities of DuBois, Clearfield, Johnstown, and Somerset 515 AM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Snow expected. Plan on difficult travel conditions. Tree branches could fall as well. Total snow accumulations of 2 to 5 inches are expected. Locally up to 6 to 8 inches is possible on the ridges to the west of route 219. * WHERE...Clearfield, Cambria and Somerset Counties. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. Winds gusting as high as 40 mph will cause areas of blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-121815- /O.CON.KCTP.WW.Y.0019.171212T1200Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 515 AM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Lake effect snow expected. Plan on difficult travel conditions. In addition, areas of poor visibility are expected. Total snow accumulations of 3 to 5 inches, with localized amounts up to 9 inches, are expected. * WHERE...McKean and Elk Counties. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Winds gusting as high as 40 mph will cause areas of blowing and drifting snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$
549 WWUS41 KCTP 121735 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 1235 PM EST Tue Dec 12 2017 PAZ004-130145- /O.CON.KCTP.LE.W.0001.000000T0000Z-171213T1800Z/ Warren- Including the city of Warren 1235 PM EST Tue Dec 12 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Heavy lake effect snow occurring. Plan on difficult travel conditions. Total snow accumulations of 8 to 12 inches, with localized amounts up to 16 inches across the northern and western sections of Warren County. * WHERE...Warren County. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-024-033-130145- /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ Clearfield-Cambria-Somerset- Including the cities of DuBois, Clearfield, Johnstown, and Somerset 1235 PM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Snow occurring. Plan on difficult travel conditions. Total accumulations of 2 to 5 inches, with locally up to 6 to 8 inches on the ridges to the west of route 219. * WHERE...Clearfield, Cambria and Somerset Counties. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-130145- /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 1235 PM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Lake effect snow occurring. Plan on difficult travel conditions. Total snow accumulations of 2 to 5 inches, with localized amounts up to 9 inches, are expected. * WHERE...McKean and Elk Counties. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ Martin/Jung
828 WWUS41 KCTP 130144 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 844 PM EST Tue Dec 12 2017 PAZ024-033-130245- /O.CAN.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ Cambria-Somerset- Including the cities of Johnstown and Somerset 844 PM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY IS CANCELLED... Scattered light snow showers will continue to affect area overnight. However, accumulations will only range from a dusting in most spots, to perhaps an inch along the ridgetops. $$ PAZ004-130945- /O.CON.KCTP.LE.W.0001.000000T0000Z-171213T1800Z/ Warren- Including the city of Warren 844 PM EST Tue Dec 12 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Heavy lake effect snow expected. Plan on difficult travel conditions. Many areas are seeing a lull in the snow this evening. However, it will pick up around midnight and continue through Wednesday morning. Additional accumulations of 3 to 6 inches are expected, with the heaviest amounts over the northwest corner of Warren County. * WHERE...Warren County. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-130945- /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ Clearfield- Including the cities of DuBois and Clearfield 844 PM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Snow expected. Plan on slippery road conditions. Snow has tapered off this evening. However, additional snow showers are expected late tonight into Wednesday morning. Additional snow accumulations of up to one inch are expected. * WHERE...Clearfield County. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-130945- /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 844 PM EST Tue Dec 12 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST WEDNESDAY... * WHAT...Lake effect snow expected. Plan on slippery road conditions. Snow has tapered off this evening. However, it will redevelop around midnight and continue into Wednesday morning. Additional accumulations of 1 to 3 inches are expected. * WHERE...McKean and Elk Counties. * WHEN...Until 1 PM EST Wednesday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$
097 WWUS41 KCTP 130905 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 405 AM EST Wed Dec 13 2017 PAZ004-131800- /O.NEW.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ /O.CON.KCTP.LE.W.0001.000000T0000Z-171213T1800Z/ Warren- Including the city of Warren 405 AM EST Wed Dec 13 2017 ...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Bands of heavy lake effect snow will diminish during the midday hours today, then additional snow will occur late today and tonight. Plan on difficult travel conditions. Additional snow accumulations of 2 to 4 inches expected this morning, and another 2 to 4 inches of snow will follow for late today and tonight. * WHERE...Warren County. * WHEN...For the Lake Effect Snow Warning, until 1 PM EST this afternoon. For the Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for significant reductions in visibility at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-131800- /O.NEW.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ Clearfield- Including the cities of DuBois and Clearfield 405 AM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Bands of snow showers will meander across the county this morning. Additional snow will spread in from the west for late today and tonight. Plan on slippery road conditions. Additional snow accumulations of an inch or two is expected this morning, followed by another 2 to 4 inches of snow late today and tonight. * WHERE...Clearfield County. * WHEN...For the Winter Weather Advisory, until 1 PM EST this afternoon. For the Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-131800- /O.NEW.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ /O.CON.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 405 AM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Bands of lake effect snow are occurring, and will dissipate during the midday hours today. Additional snow will spread in from the west late today and continue tonight. Plan on slippery road conditions. Additional snow accumulations of up to two inches are expected this morning. Another 2 to 3 inches of snow is likely late today and tonight. * WHERE...McKean and Elk Counties. * WHEN...For the Winter Weather Advisory, until 1 PM EST this afternoon. For the Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ024-033-131800- /O.NEW.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ Cambria-Somerset- Including the cities of Johnstown and Somerset 405 AM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Plan on slippery road conditions. Snow accumulations of 3 to 4 inches are expected. * WHERE...Cambria and Somerset Counties. * WHEN...From 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ Lambert/RXR
749 WWUS41 KCTP 131808 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 108 PM EST Wed Dec 13 2017 ...A fast moving Alberta Clipper storm system will bring a widespread light to moderate snowfall to the region overnight... PAZ004-140215- /O.EXP.KCTP.LE.W.0001.000000T0000Z-171213T1800Z/ /O.CON.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ Warren- Including the city of Warren 108 PM EST Wed Dec 13 2017 ...LAKE EFFECT SNOW WARNING WILL EXPIRE AT 1 PM EST THIS AFTERNOON... ...THE NEW WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Additional snow accumulations of 3 to 5 inches are expected. * WHERE...Warren County. * WHEN...Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and poor road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ017-140215- /O.EXP.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ /O.CON.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ Clearfield- Including the cities of DuBois and Clearfield 108 PM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 1 PM EST THIS AFTERNOON... ...THE NEW WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Additional snow accumulations of 3 to 5 inches are expected. * WHERE...Clearfield County. * WHEN...Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and poor road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ005-010-140215- /O.EXP.KCTP.WW.Y.0019.000000T0000Z-171213T1800Z/ /O.CON.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ McKean-Elk- Including the cities of Bradford, St. Marys, and Ridgway 108 PM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 1 PM EST THIS AFTERNOON... ...THE NEW WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Additional snow accumulations of 3 to 5 inches are expected. * WHERE...McKean and Elk Counties. * WHEN...Winter Weather Advisory, from 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and poor road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ006-011-012-018-019-025>028-034-037-041-042-045-046-049>053- 056>059-140215- /O.EXB.KCTP.WW.Y.0020.171214T0000Z-171214T1300Z/ Potter-Cameron-Northern Clinton-Northern Centre-Southern Centre- Blair-Huntingdon-Mifflin-Juniata-Bedford-Tioga-Northern Lycoming- Sullivan-Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon- Including the cities of Coudersport, Emporium, Renovo, Philipsburg, State College, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Bedford, Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, Harrisburg, Hershey, Pottsville, and Lebanon 108 PM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 2 to 4 inches, with localized amounts up to 6 inches possible. * WHERE...Much of central Pennsylvania. * WHEN...From 7 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and poor road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$ PAZ024-033-140215- /O.CON.KCTP.WW.Y.0020.171213T2300Z-171214T1300Z/ Cambria-Somerset- Including the cities of Johnstown and Somerset 108 PM EST Wed Dec 13 2017 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING TO 8 AM EST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 3 to 6 inches are expected. * WHERE...Cambria and Somerset Counties. * WHEN...From 6 PM this evening to 8 AM EST Thursday. * ADDITIONAL DETAILS...Be prepared for reduced visibilities and poor road conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Visit www.511pa.com for the latest travel, roadway and traffic conditions. $$
What forecasters said that day
The local office's own words before this lake effect snow warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before this lake effect snow warning went out at Dec 11, 7:11 AM EST, 4 hours 51 minutes earlier.
Area forecast discussion, Dec 11, 7:11 AM EST, 4 hours 51 minutes before
Area Forecast Discussion National Weather Service State College PA 711 AM EST Mon Dec 11 2017 .SYNOPSIS... An alberta clipper will track just north of Pennsylvania tonight, with a trailing arctic cold front sweeping through the area Tuesday. A deep upper level trough will remain over the eastern conus through the rest of this week with another weak clipper likely affecting the area Thursday. The upper trough will likely lift out by next weekend. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A moisture-starved shortwave is moving through central Pa early this morning, accompanied by a few snow showers/flurries over the northern mountains. The shortwave will be passing east of the area by 12Z. However, will maintain mention of a few lingering snow showers across the northwest mountains until late morning in association with a dying cold front sagging south from the Grt Lks. For most of central Pa, expect a dry and slightly milder Monday, as ridging briefly works into the region. Downsloping subsidence should result in mostly sunny skies east of the mountains, while stratocu lingers beneath subsidence inversion over the northwest mountains. By late in the day, expect increasing mid and high level cloudiness to arrive ahead of clipper over the Grt Lks. Model soundings are well mixed to at least 900mb, where temps of -4C to -6C should translate to max temps from around 30F over the northwest mountains, to near 40F across the Lower Susq Valley. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/... All model guidance tracks clipper north of Pa tonight, which should keep the most substantial snow north of Pa. However, blend of latest guidance still supports a period of light overrunning snow across northern Pa, with accums generally in the 1-3 inch range. An examination of model omega/temperature time sections indicates bulk of lift occurring tonight will be well beneath the DGZ, indicating snow/water ratios not much above 10 to 1. The coldest air of the season is forecast to arrive behind trailing arctic cold front Tuesday with more lake effect snow lasting through midweek. Between light clipper snow tonight and Tue-Wed lake effect, WPC graphics indicate about a 50 pct chance of exceeding winter storm criteria across the snowbelt of Warren County, so have issued a wint storm watch up there. Further east, all model guidance indicating limited potential of reaching warning criteria. However, model blended qpf supports a long duration advisory over Elk/Mckean counties. Still some concern about snow squalls accompanying cold front passage between 12Z-18Z Tuesday. However, lower tropospheric lapse rates look less impressive than would be expected for a significant snow squall event and 00Z model CAPES are nonexistent until front reaches the Lower Susq Valley, where boundary layer temps appear borderline for shra vs shsn and surface temps are likely to be near 40F. Gusty wnw winds will develop Tuesday behind the cold front with bufkit soundings supporting frequent gusts of 30kts+ by late in the day. && .LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/... Model soundings suggest wind advisory criteria is possible early Wed, as large scale subsidence and pressure fall/rise couplet moves through. Have added blowing/drifting to the forecast, where sig snow is expected over the northwest mountains. Base of upper trough and coldest air will be over the region Wed, with temps likely not reaching 20F over the Allegheny Plateau and only reaching the upper 20s across the LSV. Lake effect snow is likely to abate late Wed, as weak surface ridge builds in from the Grt Lks. Med range guidance indicates another clipper is likely to affect the area Thursday with another potential light snowfall. After that, ECENS and GEFS both indicate upper trough will lift out, resulting in a marked warm up next weekend. Latest EC ensemble MOS guidance indicating temps returning to near or slightly above climo by next weekend. && .AVIATION /12Z MONDAY THROUGH FRIDAY/... Lake flow will keep snow showers over the KBFD terminal off and on through the mid morning hours. Restrictions there will remain IFR through about 15z, then improve to MVFR. MVFR cigs will persist at KJST into the early afternoon, and brief MVFR cigs will be poss mid morning in parts of the central mountains. Mainly VFR conditions are forecast elsewhere, with a scattered to broken deck between 5000 and 12000 feet. Winds will be westerly at 5 to 10 knots. An alberta clipper will track just north of Pennsylvania tonight, with a trailing arctic cold front sweeping through the area Tuesday. Light snow will begin to impact NW mountains after midnight, and spread into the NW half around 10-14z Tues. The snow will be accompanied by cig/vsby reductions - again primarily over the NW half of CWA. Some concern about snow squalls accompanying cold front passage between 12Z-18Z Tuesday. Then gusty WNW winds develop with frequent gusts of 30kts+ by late in the day. Outlook... Late tonight and Tuesday...Periods of light snow - mainly NW half. Widespread MVFR likely, with periods of IFR and brief LIFR cigs and vsbys NW. Wed...Snow showers with IFR NW Mtns. Sct snow showers with MVFR NW half. Otherwise VFR. Thu-Fri...Sct snow showers. Reductions west. && .CTP WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory from 7 PM this evening to 4 PM EST Wednesday for PAZ005-010. Winter Storm Watch from this evening through Wednesday afternoon for PAZ004. && SYNOPSIS...Fitzgerald NEAR TERM...Fitzgerald SHORT TERM...Fitzgerald LONG TERM...Fitzgerald AVIATION...RXR
Hazardous weather outlook, Dec 11, 6:50 AM EST, 5 hours 12 minutes before
Hazardous Weather Outlook National Weather Service State College PA 650 AM EST Mon Dec 11 2017 PAZ019-024>028-033>036-045-046-049>053-056>059-063>066-121200- Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Juniata-Somerset- Bedford-Fulton-Franklin-Southern Clinton-Southern Lycoming-Union- Snyder-Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill- Lebanon-Cumberland-Adams-York-Lancaster- 650 AM EST Mon Dec 11 2017 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Strong, gusty winds will develop over the area Tuesday night into Wednesday, as the coldest air of the season moves into the area. The wind gusts could potentially be strong enough to down tree limbs and result in scattered power outages. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ004-121200- Warren- 650 AM EST Mon Dec 11 2017 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH WEDNESDAY AFTERNOON... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Winter Storm Watch. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Winter Storm Watch. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ005-010-121200- McKean-Elk- 650 AM EST Mon Dec 11 2017 ...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 4 PM EST WEDNESDAY... This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and Tonight. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Winter Weather Advisory. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Please listen to NOAA Weather Radio or go to weather.gov/StateCollege on the internet for more information about the following hazards. Winter Weather Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. PAZ006-011-012-017-018-037-041-042-121200- Potter-Cameron-Northern Clinton-Clearfield-Northern Centre-Tioga- Northern Lycoming-Sullivan- 650 AM EST Mon Dec 11 2017 This Hazardous Weather Outlook is for central Pennsylvania. .DAY ONE...Today and Tonight. Light snow will fall over the area tonight into early Tuesday morning. Accumulations only be between 1 and 2 inches in most places, but could still cause slippery roads Tuesday morning. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Strong, gusty winds will develop over the area Tuesday night into Wednesday, as the coldest air of the season moves into the area. The wind gusts could potentially be strong enough to down tree limbs and result in scattered power outages. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 11, 4:25 AM EST | Winter Weather Advisory | CTP | Cambria, Clearfield, Elk, McKean, Somerset | 57 hr |
Nearby
Lake Effect Snow Warnings in Pennsylvania, 2017Every lake effect snow warning in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.