Alert archive / Maryland / Freeze Warnings in 2013

Freeze Warning 5, NWS Philadelphia/Mount Holly

November 3, 2013Delaware County, Philadelphia County, Pennsylvania; 4 counties in Maryland

NWS Philadelphia/Mount Holly issued this freeze warning at Nov 3, 2013, 3:31 AM EST for Delaware County, Philadelphia County, Pennsylvania; 4 counties in Maryland. It took effect at Nov 4, 2013, 3:00 AM EST. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 3, 2013, 3:31 AM EST (08:31 UTC)
In effect from
Nov 4, 2013, 3:00 AM EST
Expired
Nov 4, 2013, 9:00 AM EST
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Delaware County, PA, Philadelphia County, PA

The radar

The Dover AFB radar (KDOX), 73 km from the middle of the area, began a volume at 08:33 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, 8.5 hours before the alert went out and 147 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.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2013-11-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2013-11-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -138 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1691 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
-138 m²/s²
0-3 km storm-relative helicity
-71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

665 
WWUS71 KPHI 030831
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
331 AM EST SUN NOV 3 2013

MDZ008-012-015-019-PAZ070-071-032200-
/O.UPG.KPHI.FZ.A.0005.131104T0600Z-131104T1400Z/
/O.NEW.KPHI.FZ.W.0005.131104T0800Z-131104T1400Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...ELKTON...CHESTERTOWN...CENTREVILLE...
EASTON...MEDIA...PHILADELPHIA
331 AM EST SUN NOV 3 2013

...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM EST MONDAY...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 3 AM TO 9 AM EST MONDAY. 

* TEMPERATURES...MAINLY IN THE LOWER 30S.

* TIMING...TEMPERATURES SHOULD START REACHING THE FREEZING MARK
  AROUND 3 AM EST ON MONDAY MORNING.

* IMPACTS...SENSITIVE PLANTS AND CROPS WILL BE KILLED BY THE
  FREEZING TEMPERATURES IF LEFT UNPROTECTED TONIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

ANY PLANT YOU WANT TO SURVIVE THE COLD SEASON, IF NOT DONE SO
ALREADY, PLEASE BRING INDOORS TODAY. PLEASE PICK ANY LAST REMAINING
SUMMER VEGETABLES.

&&

$$
2 follow-up statements
410 
WWUS71 KPHI 031916
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
216 PM EST SUN NOV 3 2013

MDZ008-012-015-019-PAZ070-071-041400-
/O.CON.KPHI.FZ.W.0005.131104T0800Z-131104T1400Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...ELKTON...CHESTERTOWN...CENTREVILLE...
EASTON...MEDIA...PHILADELPHIA
216 PM EST SUN NOV 3 2013

...FREEZE WARNING REMAINS IN EFFECT FROM 3 AM TO 9 AM EST
MONDAY...

* TEMPERATURES...AT OR BELOW FREEZING.

* TIMING...TEMPERATURES SHOULD REACH THE FREEZING MARK AROUND 3 AM
  EST ON MONDAY MORNING AND NOT RISE ABOVE FREEZING UNTILL AFTER
  SUNRISE. 

* IMPACTS...SENSITIVE PLANTS AND CROPS WILL BE KILLED BY THE 
  FREEZING TEMPERATURES IF LEFT UNPROTECTED TONIGHT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

ANY PLANT YOU WANT TO SURVIVE THE COLD SEASON... IF NOT DONE SO
ALREADY... PLEASE BRING INDOORS TODAY. PLEASE PICK ANY LAST
REMAINING SUMMER VEGETABLES.

&&

$$
GAINES
915 
WWUS71 KPHI 040840
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
340 AM EST MON NOV 4 2013

MDZ008-012-015-019-PAZ070-071-041400-
/O.CON.KPHI.FZ.W.0005.000000T0000Z-131104T1400Z/
CECIL-KENT MD-QUEEN ANNES-TALBOT-DELAWARE-PHILADELPHIA-
INCLUDING THE CITIES OF...ELKTON...CHESTERTOWN...CENTREVILLE...
EASTON...MEDIA...PHILADELPHIA
340 AM EST MON NOV 4 2013

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EST THIS MORNING...

* TEMPERATURES...AT OR BELOW FREEZING.

* TIMING...TEMPERATURES AT OR BELOW 32 DEGREES WILL REMAIN IN
  PLACE UNTIL AFTER SUNRISE.

* IMPACTS...SENSITIVE PLANTS AND CROPS WILL BE KILLED BY THE 
  FREEZING TEMPERATURES IF LEFT UNPROTECTED TONIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

ANY PLANT YOU WANT TO SURVIVE THE COLD SEASON... IF NOT DONE SO
ALREADY... PLEASE BRING INDOORS TODAY. PLEASE PICK ANY LAST
REMAINING SUMMER VEGETABLES.

&&

$$

KRUZDLO

Nearby

Freeze Warnings in Maryland, 2013Freeze Warnings in Pennsylvania, 2013Every freeze warning in 2013

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.