Alert archive / New Jersey / Red Flag Warnings in 2012

Red Flag Warning 3, NWS Philadelphia/Mount Holly

April 4, 201216 counties in New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this red flag warning at Apr 4, 2012, 11:00 AM EDT for 16 counties in New Jersey; 7 counties in Pennsylvania; New Castle County, Delaware. It was in force for 9 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
Apr 4, 2012, 11:00 AM EDT (15:00 UTC)
Expired
Apr 4, 2012, 8:00 PM EDT
In force
9 hr
Issued by
NWS Philadelphia/Mount Holly
All 24 counties

New Castle County, DE, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Carbon County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 58 km from the middle of the area, began a volume at 15:00 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, 3.0 hours before the alert went out and 125 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 2012-04-04Temperature 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 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 2012-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -39 square meters per square second.1939587897Sfc1 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
2118 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-39 m²/s²
0-3 km storm-relative helicity
75 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.

701 
WWUS81 KPHI 041500
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1100 AM EDT WED APR 4 2012

DEZ001-NJZ001-007>010-012>027-PAZ054-055-060>062-067>071-050000-
/O.NEW.KPHI.FW.W.0003.120404T1500Z-120405T0000Z/
NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
1100 AM EDT WED APR 4 2012

...RED FLAG WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 8 PM EDT THIS EVENING.

* AFFECTED AREA...NEW JERSEY....EASTERN PENNSYLVANIA...AND
  NORTHERN DELAWARE.

* WINDS...NORTHWEST 15 TO 20 MPH WITH GUSTS UP TO 30 MPH.

* TIMING...THROUGH 8 PM THIS EVENING.

* RELATIVE HUMIDITY...AS LOW AS 20 PERCENT.

* TEMPERATURES...RANGING FROM THE UPPER 50S TO AROUND 60 IN THE
  POCONOS..TO THE UPPER 60S TO LOW 70S ELSEWHERE.

* IMPACTS...BECAUSE OF THE METEOROLOGICAL CONDITIONS... THE POTENTIAL
  EXISTS FOR RAPID SPREAD IF UNCONTROLLED FIRES DEVELOP. THE FIRE
  DANGER WILL BE ELEVATED DUE TO THE STRONG WIND GUSTS...RECENT
  LACK OF PRECIPITATION...LOW RELATIVE HUMIDITIES...AND DRY FUELS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL
CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.

FOR MORE INFORMATION ABOUT WILDFIRE DANGER, BURN RESTRICTIONS,
AND WILDFIRE PREVENTION AND EDUCATION, PLEASE VISIT YOUR STATE
FORESTRY OR ENVIRONMENTAL PROTECTION WEBSITE.

&&

$$
1 follow-up statement
613 
WWUS81 KPHI 042358
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
758 PM EDT WED APR 4 2012

DEZ001-NJZ001-007>010-012>027-PAZ054-055-060>062-067>071-050100-
/O.EXP.KPHI.FW.W.0003.000000T0000Z-120405T0000Z/
NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC-COASTAL OCEAN-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
758 PM EDT WED APR 4 2012

...RED FLAG WARNING WILL EXPIRE AT 8 PM EDT THIS EVENING FOR 
NEW JERSEY, EASTERN PENNSYLVANIA, AND NORTHERN DELAWARE...

WIND SPEEDS HAVE DROPPED BELOW CRITERIA AND HUMIDITIES HAVE RISEN
ABOVE CRITERIA. THEREFORE, THE RED FLAG WARNING WILL BE ALLOWED TO
EXPIRE AT 8 PM.

$$

RPW

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 4, 3:30 AM EDTSmall Craft AdvisoryPHI32 hr
Apr 4, 3:39 AM EDTFrost AdvisoryPHIWarren28 hr

Nearby

Red Flag Warnings in New Jersey, 2012Red Flag Warnings in Pennsylvania, 2012Red Flag Warnings in Delaware, 2012Every red flag warning in 2012

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.