Alert archive / New Jersey / Red Flag Warnings in 2012

Red Flag Warning 1, NWS Philadelphia/Mount Holly

March 7, 20127 counties in Pennsylvania; 13 counties in New Jersey

NWS Philadelphia/Mount Holly issued this red flag warning at Mar 7, 2012, 3:31 AM EST for 7 counties in Pennsylvania; 13 counties in New Jersey. It took effect at Mar 7, 2012, 10:00 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
Mar 7, 2012, 3:31 AM EST (08:31 UTC)
In effect from
Mar 7, 2012, 10:00 AM EST
Expired
Mar 7, 2012, 3:32 PM EST
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean 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), 66 km from the middle of the area, began a volume at 08:29 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 00:00Z, 8.5 hours before the alert went out and 185 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, Brookhaven, NY at 00:00Z on 2012-03-07Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2012-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.19395878Sfc1 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
1765 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
242 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.

252 
WWUS81 KPHI 070831
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
331 AM EST WED MAR 7 2012

NJZ016-021-023-070945-
/O.CAN.KPHI.FW.A.0001.120307T1500Z-120308T0000Z/
SALEM-CUMBERLAND-CAPE MAY-
331 AM EST WED MAR 7 2012

...FIRE WEATHER WATCH IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE
FIRE WEATHER WATCH.

WHILE CONDITIONS WILL FAVOR ENHANCED FIRE DANGER...THE COMBINATION
OF WINDS AND MINIMUM RELATIVE HUMIDITY VALUES ARE NOT EXPECTED TO
REACH RED FLAG CRITERIA.

$$

NJZ001-007>010-012-013-015-017>020-022-027-PAZ054-055-060>062-
067>071-072115-
/O.UPG.KPHI.FW.A.0001.120307T1500Z-120308T0000Z/
/O.NEW.KPHI.FW.W.0001.120307T1500Z-120308T0000Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
OCEAN-ATLANTIC-SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-
NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
331 AM EST WED MAR 7 2012

...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 7 PM EST
THIS EVENING...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM EST
THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT.

* AFFECTED AREA...EASTERN PENNSYLVANIA AND MOST OF NEW JERSEY.

* WINDS...SOUTHWEST 10 TO 15 MPH WITH GUSTS UP TO 25 MPH.

* TIMING...FROM 1000 AM UNTIL 700 PM.

* RELATIVE HUMIDITY...AS LOW AS 25 PERCENT.

* TEMPERATURES...RANGING FROM THE MID 50S ACROSS SOUTHERN POCONOS
  IN THE LOWER TO MID 60S ACROSS PORTIONS OF NEW JERSEY.

* 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.

&&

$$
1 follow-up statement
707 
WWUS81 KPHI 072032
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
332 PM EST WED MAR 7 2012


NJZ001-007>010-012-013-015-017>020-022-027-PAZ054-055-060>062-
067>071-072145-
/O.CAN.KPHI.FW.W.0001.000000T0000Z-120308T0000Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-MERCER-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-
OCEAN-ATLANTIC-SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-
NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA-
332 PM EST WED MAR 7 2012

...RED FLAG WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS CANCELLED THE RED
FLAG WARNING.

FOR MOST LOCATIONS, THE COMBINATION OF WINDS AND MINIMUM RELATIVE
HUMIDITY VALUES HAVE BEEN MARGINAL OR HAVE NOT MET RED FLAG
CRITERIA. CONDITIONS ARE EXPECTED TO IMPROVE, AND THUS THE RED
FLAG WARNING HAS BEEN CANCELLED.

$$

KLINE/MIKETTA

Nearby

Red Flag Warnings in New Jersey, 2012Red Flag Warnings in Pennsylvania, 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.