Alert archive / Pennsylvania / Ice Storm Warnings in 2021
Ice Storm Warning 1, NWS State College, PA
NWS State College, PA issued this ice storm warning at Jan 1, 2021, 2:36 AM EST for Somerset County, Pennsylvania. It took effect at Jan 1, 2021, 9:00 AM EST. It was in force for 14 hr. 2 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
- Jan 1, 2021, 2:36 AM EST (07:36 UTC)
- In effect from
- Jan 1, 2021, 9:00 AM EST
- Expired
- Jan 1, 2021, 10:54 PM EST
- In force
- 14 hr
- Issued by
- NWS State College, PA
County Somerset County, PA
The radar
The Pittsburgh radar (KPBZ), 119 km from the middle of the area, began a volume at 07:38 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 |
|---|---|---|---|
| Jan 1, 2:50 PM EST | FREEZING RAIN 0.5 | Seven Springs, PA | ICE ACCUMULATING ON TREES THAT ALREADY HAD HEAVY SNOW ON THEM, CAUSING TREES TO BEND OVER. |
| Jan 1, 3:20 PM EST | FREEZING RAIN 0.25 | Somerset, PA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 7.6 hours before the alert went out and 103 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
- 785 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
197 WWUS41 KCTP 010736 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 236 AM EST Fri Jan 1 2021 PAZ033-011945- /O.UPG.KCTP.WW.Y.0022.210101T1500Z-210102T0600Z/ /O.NEW.KCTP.IS.W.0001.210101T1400Z-210102T0500Z/ Somerset- Including the city of Somerset 236 AM EST Fri Jan 1 2021 ...ICE STORM WARNING IN EFFECT FROM 9 AM THIS MORNING TO MIDNIGHT EST TONIGHT... * WHAT...Significant icing expected. Total ice accumulations of one tenth to four tenths of an inch, with the greatest amounts on the ridgetops. * WHERE...Somerset County. * WHEN...From 9 AM this morning to midnight EST tonight. * IMPACTS...Untreated roads and sidewalks will be very slippery. Scattered power outages and downed tree limbs are possible due to the weight of the ice, mainly over the higher terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel as severe winter weather conditions will make travel very hazardous. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$ PAZ004>006-010>012-017>019-024>028-034>037-041-042-045-046- 049>053-056>058-063-064-011945- /O.CON.KCTP.WW.Y.0022.210101T1500Z-210102T0600Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Cumberland-Adams- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Bedford, McConnellsburg, Chambersburg, Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, Harrisburg, Hershey, Pottsville, Carlisle, and Gettysburg 236 AM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 1 AM EST SATURDAY... * WHAT...Freezing rain, possibly beginning as a brief period of snow or sleet. Total ice accumulations ranging from a light glaze in the valleys, to around a quarter of an inch on the ridgetops. * WHERE...Portions of central Pennsylvania. * WHEN...Precipitation will spread northeast across the region during the afternoon, reaching Altoona and Johnstown by noon and reaching areas north of Williamsport by late afternoon. Freezing rain should transition to plain rain in most spots by late this evening. * IMPACTS...Untreated roads and sidewalks could be very slippery. Isolated power outages and downed tree limbs are possible over the higher terrain. 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. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$
2 follow-up statements
643 WWUS41 KCTP 011934 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 234 PM EST Fri Jan 1 2021 PAZ033-020500- /O.CON.KCTP.IS.W.0001.000000T0000Z-210102T0500Z/ Somerset- Including the city of Somerset 234 PM EST Fri Jan 1 2021 ...ICE STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EST TONIGHT... * WHAT...Significant icing expected. Total ice accumulations of one tenth to four tenths of an inch, with the greatest amounts on the ridgetops. * WHERE...Somerset County. * WHEN...Through midnight EST tonight. * IMPACTS...Untreated roads and sidewalks will be very slippery. Scattered power outages and downed tree limbs are possible due to the weight of the ice, mainly over the higher terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission strongly encourage motorists to heed all travel restrictions and delay unnecessary travel as severe winter weather conditions will make travel very hazardous. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$ PAZ059-065-066-020600- /O.EXA.KCTP.WW.Y.0022.000000T0000Z-210102T0600Z/ Lebanon-York-Lancaster- Including the cities of Lebanon, York, and Lancaster 234 PM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM EST SATURDAY... * WHAT...Pockets of freezing rain mixed with rain. Total ice accumulations ranging from a light glaze up to a tenth of an inch over higher elevations. * WHERE...Lebanon, York and Lancaster Counties. * WHEN...Freezing rain should change to plain rain in most spots by late this evening as temperatures warm above freezing. * IMPACTS...Untreated roads and sidewalks could be very slippery. Isolated power outages and downed tree limbs are possible over higher elevations. * ADDITIONAL DETAILS... PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$ PAZ004>006-010>012-017>019-024>028-034>037-041-042-045-046- 049>053-056>058-063-064-020600- /O.CON.KCTP.WW.Y.0022.000000T0000Z-210102T0600Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Cumberland-Adams- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Bedford, McConnellsburg, Chambersburg, Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, Harrisburg, Hershey, Pottsville, Carlisle, and Gettysburg 234 PM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST SATURDAY... * WHAT...Freezing rain mixed with rain at times. Total ice accumulations ranging from a light glaze in the valleys, to around a quarter of an inch on the ridgetops. * WHERE...Much of central Pennsylvania. * WHEN...Steady light, to at times moderate, freezing rain will continue this afternoon and early evening. Freezing rain should change to plain rain in most spots by late this evening. * IMPACTS...Untreated roads and sidewalks could be very slippery. Isolated power outages and downed tree limbs are possible over the higher terrain. 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. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$ BG/RR/AT/MD
199 WWUS41 KCTP 020354 WSWCTP URGENT - WINTER WEATHER MESSAGE National Weather Service State College PA 1054 PM EST Fri Jan 1 2021 PAZ033-020600- /O.CAN.KCTP.IS.W.0001.000000T0000Z-210102T0500Z/ /O.EXA.KCTP.WW.Y.0022.000000T0000Z-210102T0600Z/ Somerset- Including the city of Somerset 1054 PM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 AM EST SATURDAY... ...ICE STORM WARNING IS CANCELLED... * WHAT...Freezing drizzle, especially across the high terrain. * WHERE...Somerset County. * WHEN...Until 1 AM EST Saturday. * IMPACTS...Untreated roads and sidewalks could be very slippery. * ADDITIONAL DETAILS...The temperatures continue to rise and some melting of the ice will start to occur shortly after midnight. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$ PAZ064>066-020500- /O.CAN.KCTP.WW.Y.0022.000000T0000Z-210102T0600Z/ Adams-York-Lancaster- Including the cities of Gettysburg, York, and Lancaster 1054 PM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... The rain is ending and the temperatures have warmed just enough to keep the threat of freezing rain away for the rest of the night. $$ PAZ004>006-010>012-017>019-024>028-034>037-041-042-045-046- 049>053-056>059-063-020600- /O.CON.KCTP.WW.Y.0022.000000T0000Z-210102T0600Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Huntingdon-Mifflin- Juniata-Bedford-Fulton-Franklin-Tioga-Northern Lycoming-Sullivan- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon- Cumberland- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Bedford, McConnellsburg, Chambersburg, Mansfield, Wellsboro, Trout Run, Laporte, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, Harrisburg, Hershey, Pottsville, Lebanon, and Carlisle 1054 PM EST Fri Jan 1 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM EST SATURDAY... * WHAT...Freezing drizzle. * WHERE...Much of central Pennsylvania. * WHEN...UNTIL 1 AM EST. * IMPACTS...Untreated roads and sidewalks could be very slippery. * ADDITIONAL DETAILS...The rain has tapered to drizzle for the most part, and many areas are close to freezing. The temperatures will warm a little through the rest of the night. The threat for freezing drizzle should end shortly after midnight. PRECAUTIONARY/PREPAREDNESS ACTIONS... The Pennsylvania Department of Transportation and Pennsylvania Turnpike Commission remind motorists to adjust speeds based on driving conditions as winter weather impacts Pennsylvania roadways. Call 5 1 1 or visit www.511pa.com for the latest travel, roadway and traffic conditions. To report snow or ice, post to the NWS State College Facebook page, use Twitter @NWSStateCollege, or visit weather.gov/ctp. && $$
Nearby
Ice Storm Warnings in Pennsylvania, 2021Every ice storm warning in 2021
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.