Alert archive / Pennsylvania / Frost Advisories in 2007
Frost Advisory 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this frost advisory at Oct 29, 2007, 3:20 PM EDT for Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware. It took effect at Oct 30, 2007, 3:00 AM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Oct 29, 2007, 3:20 PM EDT (19:20 UTC)
- In effect from
- Oct 30, 2007, 3:00 AM EDT
- Expired
- Oct 30, 2007, 8:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Philadelphia/Mount Holly
Counties New Castle County, DE, Delaware County, PA, Philadelphia County, PA
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.3 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1247 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS71 KPHI 291920 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 320 PM EDT MON OCT 29 2007 DEZ002-003-MDZ012-015-019-020-301200- /O.NEW.KPHI.FZ.W.0005.071030T0700Z-071030T1200Z/ KENT DE-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- INCLUDING THE CITIES OF...DOVER...GEORGETOWN...CHESTERTOWN... CENTREVILLE...EASTON...DENTON 320 PM EDT MON OCT 29 2007 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 8 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FREEZE WARNING, WHICH IS IN EFFECT FROM 3 AM TO 8 AM EDT TUESDAY. CLEAR SKIES AND CALM WINDS OVERNIGHT WILL LEAD TO A PERIOD OF SUB-FREEZING TEMPERATURES AND WIDESPREAD FROST OVER MUCH OF CENTRAL AND SOUTHERN DELAWARE AND ADJACENT PORTIONS OF THE MARYLAND EASTERN SHORE. THESE CONDITIONS WILL KILL SENSITIVE VEGETATION. IF YOU HAVE ANY SENSITIVE PLANTS OUTSIDE, PROTECT THEM OR BRING THEM INDOORS. $$ DEZ001-PAZ070-071-301200- /O.NEW.KPHI.FR.Y.0008.071030T0700Z-071030T1200Z/ NEW CASTLE-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MEDIA 320 PM EDT MON OCT 29 2007 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FROST ADVISORY, WHICH IS IN EFFECT FROM 3 AM TO 8 AM EDT TUESDAY. CLEAR SKIES AND CALM WINDS OVERNIGHT WILL LEAD TO ANOTHER COLD NIGHT. AREAS OF FROST ARE FORECAST OUTSIDE OF CENTER CITY PHILADELPHIA. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. IF YOU HAVE ANY SENSITIVE PLANTS OUTSIDE, PROTECT THEM OR BRING THEM INDOORS. $$ MPD
1 follow-up statement
000 WWUS71 KPHI 301223 NPWPHI URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 823 AM EDT TUE OCT 30 2007 ...FREEZE WARNING NO LONGER IN EFFECT... THE FREEZE WARNING IS NO LONGER IN EFFECT. THERE WERE SOME ISOLATED AREAS OF NORTHWEST NEW JERSEY WHERE THE TEMPERATURE WAS AT 31 DEGREES BUT WILL SOON CLIMB INTO THE MID 30S SHORTLY. DEZ002-003-MDZ012-015-019-020-301330- /O.EXP.KPHI.FZ.W.0005.000000T0000Z-071030T1200Z/ KENT DE-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- INCLUDING THE CITIES OF...DOVER...GEORGETOWN...CHESTERTOWN... CENTREVILLE...EASTON...DENTON 823 AM EDT TUE OCT 30 2007 ...FREEZE WARNING HAS EXPIRED... THE FREEZE WARNING IS NO LONGER IN EFFECT. TEMPERATURES ACROSS THE REGION HAVE CLIMBED ABOVE THE FREEZING MARK. $$ DEZ001-PAZ070-071-301330- /O.EXP.KPHI.FR.Y.0008.000000T0000Z-071030T1200Z/ NEW CASTLE-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MEDIA 823 AM EDT TUE OCT 30 2007 ...FROST ADVISORY HAS EXPIRED... THE FROST ADVISORY IS NO LONGER IN EFFECT. THE TEMPERATURES HAVE CLIMBED INTO THE LOWER 40S THIS HOUR. $$ EBERWINE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 29, 3:20 PM EDT | Freeze Warning | PHI | Kent, Sussex | 17 hr |
Nearby
Frost Advisories in Pennsylvania, 2007Frost Advisories in Delaware, 2007Every frost advisory in 2007
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.