Alert archive / New Jersey / Freeze Warnings in 2011

Freeze Warning 1, NWS Philadelphia/Mount Holly

October 27, 2011Hunterdon County, Somerset County, New Jersey; Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this freeze warning at Oct 27, 2011, 2:30 PM EDT for Hunterdon County, Somerset County, New Jersey; Berks County, Pennsylvania. It took effect at Oct 28, 2011, 4:00 AM EDT. It was in force for 4 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
Oct 27, 2011, 2:30 PM EDT (18:30 UTC)
In effect from
Oct 28, 2011, 4:00 AM EDT
Expired
Oct 28, 2011, 8:00 AM EDT
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Somerset County, NJ, Berks County, PA

The radar

The Philadelphia radar (KDIX), 89 km from the middle of the area, began a volume at 18:31 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.5 hours before the alert went out and 142 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-10-27Temperature 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939587897117Sfc1 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
842 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
149 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.

741 
WWUS71 KPHI 271830
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
230 PM EDT THU OCT 27 2011

PAZ060-067>069-281200-
/O.UPG.KPHI.FZ.A.0001.111028T0900Z-111028T1300Z/
/O.NEW.KPHI.FZ.W.0001.111028T0800Z-111028T1200Z/
BERKS-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...READING...WEST CHESTER...NORRISTOWN...
DOYLESTOWN
230 PM EDT THU OCT 27 2011

...FREEZE WARNING IN EFFECT FROM 4 AM TO 8 AM EDT FRIDAY...

THE NATIONAL WEATHER SERVICE HAS ISSUED A FREEZE WARNING. IT IS IN
EFFECT FROM 400 AM UNTIL 800 AM FRIDAY.

* LOCATIONS...THE PENNSYLVANIA COUNTIES OF BERKS, CHESTER,
  MONTGOMERY AND BUCKS.

* HAZARDS...A PERIOD OF BELOW FREEZING TEMPERATURES AT RURAL
  LOCATIONS IN THE COUNTIES.

* TEMPERATURES...TEMPERATURES ARE FORECAST TO DROP TO AROUND 30
  DEGREES AT RURAL LOCATIONS IN THE COUNTIES.

* TIMING...THE BELOW FREEZING TEMPERATURES ARE EXPECTED TO OCCUR
  DURING THE HOURS JUST BEFORE AND AROUND DAYBREAK ON FRIDAY.

* IMPACTS...THE BELOW FREEZING TEMPERATURES WILL HAVE A NEGATIVE
  IMPACT ON ANY SENSITIVE PLANTS THAT REMAIN OUTDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS THAT SUB-FREEZING TEMPERATURES ARE
ANTICIPATED. THE EXPECTED CONDITIONS WILL HARM SENSITIVE
VEGETATION. IF POSSIBLE, BRING ANY SENSITIVE PLANTS INDOORS
TONIGHT.

&&

$$

NJZ009-010-281200-
/O.NEW.KPHI.FZ.W.0001.111028T0800Z-111028T1200Z/
HUNTERDON-SOMERSET-
INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE
230 PM EDT THU OCT 27 2011

...FREEZE WARNING IN EFFECT FROM 4 AM TO 8 AM EDT FRIDAY...

THE NATIONAL WEATHER SERVICE HAS ISSUED A FREEZE WARNING. IT IS IN
EFFECT FROM 400 AM UNTIL 800 AM FRIDAY.

* LOCATIONS...THE NEW JERSEY COUNTIES OF HUNTERDON AND SOMERSET.

* HAZARDS...A PERIOD OF BELOW FREEZING TEMPERATURES AT RURAL
  LOCATIONS IN THE COUNTIES.

* TEMPERATURES...TEMPERATURES ARE FORECAST TO DROP TO AROUND 30
  DEGREES AT RURAL LOCATIONS IN THE COUNTIES.

* TIMING...THE BELOW FREEZING TEMPERATURES ARE EXPECTED TO OCCUR
  DURING THE HOURS JUST BEFORE AND AROUND DAYBREAK ON FRIDAY.

* IMPACTS...THE BELOW FREEZING TEMPERATURES WILL HAVE A NEGATIVE
  IMPACT ON ANY SENSITIVE PLANTS THAT REMAIN OUTDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS THAT SUB-FREEZING TEMPERATURES ARE
ANTICIPATED. THE EXPECTED CONDITIONS WILL HARM SENSITIVE
VEGETATION. IF POSSIBLE, BRING ANY SENSITIVE PLANTS INDOORS
TONIGHT.

&&

$$

IOVINO
2 follow-up statements
530 
WWUS71 KPHI 280050
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
850 PM EDT THU OCT 27 2011

NJZ009-010-PAZ060-067>069-281200-
/O.CON.KPHI.FZ.W.0001.111028T0800Z-111028T1200Z/
HUNTERDON-SOMERSET-BERKS-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING...
WEST CHESTER...NORRISTOWN...DOYLESTOWN
850 PM EDT THU OCT 27 2011

...FREEZE WARNING REMAINS IN EFFECT FROM 4 AM TO 8 AM EDT
FRIDAY...

* LOCATIONS...THE PENNSYLVANIA COUNTIES OF BERKS, CHESTER,
  MONTGOMERY AND BUCKS, AND THE NEW JERSEY COUNTIES OF HUNTERDON
  AND SOMERSET.

* HAZARDS...A PERIOD OF BELOW FREEZING TEMPERATURES AT RURAL
  LOCATIONS IN THE COUNTIES.

* TEMPERATURES...TEMPERATURES ARE FORECAST TO DROP TO AROUND 30
  DEGREES AT RURAL LOCATIONS.

* TIMING...THE BELOW FREEZING TEMPERATURES ARE EXPECTED TO OCCUR
  DURING THE HOURS JUST BEFORE AND AROUND DAYBREAK ON FRIDAY.

* IMPACTS...THE BELOW FREEZING TEMPERATURES WILL HAVE A NEGATIVE
  IMPACT ON ANY SENSITIVE PLANTS THAT REMAIN OUTDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS THAT SUB-FREEZING TEMPERATURES ARE
ANTICIPATED. THE EXPECTED CONDITIONS WILL HARM SENSITIVE
VEGETATION. IF POSSIBLE, BRING ANY SENSITIVE PLANTS INDOORS
TONIGHT.

&&

$$

IOVINO
861 
WWUS71 KPHI 281157
NPWPHI

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
757 AM EDT FRI OCT 28 2011

NJZ009-010-PAZ060-067>069-281300-
/O.EXP.KPHI.FZ.W.0001.000000T0000Z-111028T1200Z/
HUNTERDON-SOMERSET-BERKS-CHESTER-MONTGOMERY-BUCKS-
INCLUDING THE CITIES OF...FLEMINGTON...SOMERVILLE...READING...
WEST CHESTER...NORRISTOWN...DOYLESTOWN
757 AM EDT FRI OCT 28 2011

...FREEZE WARNING WILL EXPIRE AT 8 AM EDT THIS MORNING...

THE FREEZE WARNING FOR THE COUNTIES OF BERKS, CHESTER, MONTGOMERY
AND BUCKS IN PENNSYLVANIA, AND FOR HUNTERDON AND SOMERSET IN NEW
JERSEY, WILL BE ALLOWED TO EXPIRE AT 800 AM.

$$

KRUZDLO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 27, 4:26 AM EDTSmall Craft AdvisoryPHI32 hr
Oct 27, 12:36 PM EDTCoastal Flood AdvisoryPHIBurlington, Camden, Gloucester4 hr
Oct 27, 12:36 PM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 4 more28 hr
Oct 27, 3:15 PM EDTWinter Storm WatchPHIMorris, Sussex, Warren25 hr
Oct 27, 4:22 AM EDTFreeze WatchPHIBerks10 hr

Nearby

Freeze Warnings in New Jersey, 2011Freeze Warnings in Pennsylvania, 2011Every freeze warning in 2011

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.