Alert archive / Pennsylvania / Frost Advisories in 2020
Frost Advisory 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Sep 20, 2020, 3:16 PM EDT for Sussex County, Warren County, New Jersey; 4 counties in Pennsylvania. It took effect at Sep 21, 2020, 1:00 AM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Sep 20, 2020, 3:16 PM EDT (19:16 UTC)
- In effect from
- Sep 21, 2020, 1:00 AM EDT
- Expired
- Sep 21, 2020, 5:49 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties Sussex County, NJ, Warren County, NJ, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 128 km from the middle of the area, began a volume at 19:15 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 12:00Z, 7.3 hours before the alert went out and 202 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
- 1455 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -104 m²/s²
- 0-3 km storm-relative helicity
- -56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
931 WWUS71 KPHI 201916 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 316 PM EDT Sun Sep 20 2020 NJZ001-007-PAZ054-055-061-062-211000- /O.NEW.KPHI.FR.Y.0010.200921T0500Z-200921T1200Z/ Sussex-Warren-Carbon-Monroe-Lehigh-Northampton- Including the cities of Newton, Washington, Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton 316 PM EDT Sun Sep 20 2020 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM EDT MONDAY... * WHAT...Temperatures as low as 35 to 37 degrees will result in frost formation. * WHERE...In New Jersey, Sussex and Warren. In Pennsylvania, Carbon, Monroe, Lehigh and Northampton. * WHEN...From 1 AM to 8 AM EDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MPS
1 follow-up statement
868 WWUS71 KPHI 210949 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 549 AM EDT Mon Sep 21 2020 NJZ001-007-PAZ054-055-061-062-211100- /O.CAN.KPHI.FR.Y.0010.000000T0000Z-200921T1200Z/ Sussex-Warren-Carbon-Monroe-Lehigh-Northampton- Including the cities of Newton, Washington, Jim Thorpe, Stroudsburg, Allentown, Bethlehem, and Easton 549 AM EDT Mon Sep 21 2020 ...FROST ADVISORY IS CANCELLED... Temperatures will warm up quickly this morning with daybreak and thus no additional frost is expected to form through the morning. $$ Deal
Nearby
Frost Advisories in Pennsylvania, 2020Frost Advisories in New Jersey, 2020Every frost advisory in 2020
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.