Alert archive / Pennsylvania / Frost Advisories in 2021
Frost Advisory 3, NWS State College, PA
NWS State College, PA issued this frost advisory at May 12, 2021, 3:58 AM EDT for 15 counties in Pennsylvania. It took effect at May 13, 2021, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- May 12, 2021, 3:58 AM EDT (07:58 UTC)
- In effect from
- May 13, 2021, 2:00 AM EDT
- Expired
- May 13, 2021, 8:00 AM EDT
- In force
- 6 hr
- Issued by
- NWS State College, PA
Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Lycoming County, PA, McKean County, PA, Potter County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Warren County, PA
The radar
The State College radar (KCCX), 25 km from the middle of the area, began a volume at 08:01 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
Pittsburgh, PA (KPIT), launched 00:00Z, 8.0 hours before the alert went out and 184 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
- 1828 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
440 WWUS71 KCTP 120758 NPWCTP URGENT - WEATHER MESSAGE National Weather Service State College PA 358 AM EDT Wed May 12 2021 PAZ004>006-010>012-017-018-024-033-037-041-042-130330- /O.NEW.KCTP.FR.Y.0003.210513T0600Z-210513T1200Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Cambria-Somerset-Tioga-Northern Lycoming-Sullivan- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, Johnstown, Somerset, Mansfield, Wellsboro, Trout Run, and Laporte 358 AM EDT Wed May 12 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...The Northern and Western Mountains of Pennsylvania. * WHEN...From 2 AM to 8 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...The frost will occur mainly in valley locations. Unprotected early season plantings may freeze, especially in some of the high mountains valleys, where the temperatures could dip to 31 or 32 degrees for a few hours just before sunrise Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants and vegetation from the cold. Potted plants should be brought inside. The latest forecast information can be found on the NWS State College Facebook page and Twitter @NWSStateCollege, or on the web at weather.gov/ctp. && $$ For more information from the National Weather Service visit http://weather.gov/ctp
2 follow-up statements
705 WWUS71 KCTP 121756 NPWCTP URGENT - WEATHER MESSAGE National Weather Service State College PA 156 PM EDT Wed May 12 2021 PAZ019-025-034-045-130600- /O.EXA.KCTP.FR.Y.0003.210513T0600Z-210513T1200Z/ Southern Centre-Blair-Bedford-Southern Clinton- Including the cities of State College, Altoona, Bedford, and Lock Haven 156 PM EDT Wed May 12 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT THURSDAY... * WHAT...Temperatures as low as 35 will allow frost formation. * WHERE...Southern Centre, Blair, Bedford and Southern Clinton Counties. * WHEN...From 2 AM to 8 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...The frost will occur mainly in valley locations. Unprotected early season plantings may freeze, especially in some of the high mountain valleys, where the temperatures could dip near freezing for an hour or two just before sunrise Thursday. Frost can occur when air temperatures taken a few feet off the ground are still above freezing. The air right at ground level can be a few degrees colder. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants and vegetation from the cold. Potted plants should be brought inside. The latest forecast information can be found on the NWS State College Facebook page and Twitter @NWSStateCollege, or on the web at weather.gov/ctp. && $$ PAZ004>006-010>012-017-018-024-033-037-041-042-130600- /O.CON.KCTP.FR.Y.0003.210513T0600Z-210513T1200Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Cambria-Somerset-Tioga-Northern Lycoming-Sullivan- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, Johnstown, Somerset, Mansfield, Wellsboro, Trout Run, and Laporte 156 PM EDT Wed May 12 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...The Northern and Western Mountains of Pennsylvania. * WHEN...From 2 AM to 8 AM EDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...The frost will occur mainly in valley locations. Unprotected early season plantings may freeze, especially in some of the high mountain valleys, where the temperatures could dip to 31 or 32 degrees for a few hours just before sunrise Thursday. Frost can occur when air temperatures taken a few feet off the ground are still above freezing. The air right at ground level can be a few degrees colder. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants and vegetation from the cold. Potted plants should be brought inside. The latest forecast information can be found on the NWS State College Facebook page and Twitter @NWSStateCollege, or on the web at weather.gov/ctp. && $$ For more information from the National Weather Service visit http://weather.gov/ctp
872 WWUS71 KCTP 130329 NPWCTP URGENT - WEATHER MESSAGE National Weather Service State College PA 1129 PM EDT Wed May 12 2021 PAZ004>006-010>012-017>019-024-025-033-034-037-041-042-045-131200- /O.CON.KCTP.FR.Y.0003.210513T0600Z-210513T1200Z/ Warren-McKean-Potter-Elk-Cameron-Northern Clinton-Clearfield- Northern Centre-Southern Centre-Cambria-Blair-Somerset-Bedford- Tioga-Northern Lycoming-Sullivan-Southern Clinton- Including the cities of Warren, Bradford, Coudersport, St. Marys, Ridgway, Emporium, Renovo, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Somerset, Bedford, Mansfield, Wellsboro, Trout Run, Laporte, and Lock Haven 1129 PM EDT Wed May 12 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THURSDAY... * WHAT...Air temperatures as low as 34 will result in frost formation. * WHERE...Portions of central Pennsylvania. * WHEN...Until 8 AM EDT Thursday. * IMPACTS...Near ground freezing temperatures could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants and vegetation from the cold. Potted plants should be brought inside. The latest forecast information can be found on the NWS State College Facebook page and Twitter @NWSStateCollege, or on the web at weather.gov/ctp. && $$ For more information from the National Weather Service visit http://weather.gov/ctp DeVoir
Nearby
Frost Advisories in Pennsylvania, 2021Every frost advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.