Alert archive / Pennsylvania / Frost Advisories in 2021
Frost Advisory 1, NWS State College, PA
NWS State College, PA issued this frost advisory at May 8, 2021, 4:05 AM EDT for 20 counties in Pennsylvania. It took effect at May 9, 2021, 2:00 AM EDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- May 8, 2021, 4:05 AM EDT (08:05 UTC)
- In effect from
- May 9, 2021, 2:00 AM EDT
- Expired
- May 9, 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, Centre County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Union County, PA, Warren County, PA
The radar
The State College radar (KCCX), 36 km from the middle of the area, began a volume at 08:04 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 8.1 hours before the alert went out and 199 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
- 78 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -74 m²/s²
- 0-3 km storm-relative helicity
- -92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
480 WWUS71 KCTP 080805 NPWCTP URGENT - WEATHER MESSAGE National Weather Service State College PA 405 AM EDT Sat May 8 2021 PAZ004-017>019-024>028-033>035-045-046-049>053-056-058-090000- /O.NEW.KCTP.FR.Y.0001.210509T0600Z-210509T1200Z/ Warren-Clearfield-Northern Centre-Southern Centre-Cambria-Blair- Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Schuylkill- Including the cities of Warren, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Somerset, Bedford, McConnellsburg, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, and Pottsville 405 AM EDT Sat May 8 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EDT SUNDAY... * WHAT...Overnight low temperatures mainly in the mid 30s, but as low as 32 degrees in some rural valleys, will result in frost formation. * WHERE...Portions of central Pennsylvania. * WHEN...From 2 AM to 8 AM EDT Sunday. * IMPACTS...Frost 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. && $$ For more information from the National Weather Service visit http://weather.gov/ctp
1 follow-up statement
852 WWUS71 KCTP 081858 NPWCTP URGENT - WEATHER MESSAGE National Weather Service State College PA 258 PM EDT Sat May 8 2021 PAZ004-017>019-024>028-033>035-045-046-049>053-056-058-091200- /O.CON.KCTP.FR.Y.0001.210509T0600Z-210509T1200Z/ Warren-Clearfield-Northern Centre-Southern Centre-Cambria-Blair- Huntingdon-Mifflin-Juniata-Somerset-Bedford-Fulton- Southern Clinton-Southern Lycoming-Union-Snyder-Montour- Northumberland-Columbia-Perry-Schuylkill- Including the cities of Warren, DuBois, Clearfield, Philipsburg, State College, Johnstown, Altoona, Huntingdon, Mount Union, Lewistown, Mifflintown, Somerset, Bedford, McConnellsburg, Lock Haven, Williamsport, Lewisburg, Selinsgrove, Danville, Sunbury, Shamokin, Bloomsburg, Berwick, Newport, and Pottsville 258 PM EDT Sat May 8 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 8 AM EDT SUNDAY... * WHAT...Temperatures in the low to mid 30s will result in areas of frost. * WHERE...Portions of central Pennsylvania. * WHEN...From 2 AM to 8 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants and vegetation from the cold. Potted plants should be brought inside. && $$ MJ/MS/RG For more information from the National Weather Service visit http://weather.gov/ctp
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.