Alert archive / Pennsylvania / Red Flag Warnings in 2015

Red Flag Warning 1, NWS Philadelphia/Mount Holly

April 15, 20158 counties in New Jersey; 10 counties in Pennsylvania

NWS Philadelphia/Mount Holly issued this red flag warning at Apr 15, 2015, 9:32 AM EDT for 8 counties in New Jersey; 10 counties in Pennsylvania. 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 15, 2015, 9:32 AM EDT (13:32 UTC)
Expired
Apr 15, 2015, 7:00 PM EDT
In force
9 hr
Issued by
NWS Philadelphia/Mount Holly

Counties Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 85 km from the middle of the area, began a volume at 13:31 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, 1.5 hours before the alert went out and 144 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 2015-04-15Temperature 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 2015-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -106 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
2549 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
-106 m²/s²
0-3 km storm-relative helicity
-1 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.

932 
WWUS81 KPHI 151332
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
932 AM EDT WED APR 15 2015


NJZ001-007>010-012>015-PAZ054-055-060>062-070-071-101>106-152300-
/O.NEW.KPHI.FW.W.0001.150415T1332Z-150415T2300Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER-
EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-
LOWER BUCKS-
932 AM EDT WED APR 15 2015

...RED FLAG WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING FOR
EASTERN PENNSYLVANIA AND NORTHERN AND CENTRAL NEW JERSEY. 

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT UNTIL 7 PM EDT THIS EVENING. 

* AREAS AFFECTED... EASTERN PENNSYLVANIA AND NORTHERN AND CENTRAL
  NEW JERSEY

* WIND... GUSTS AROUND 20 KNOTS THROUGHOUT MOST OF THE DAY. 

* HUMIDITY... FALLING TO BETWEEN 15 AND 20 PERCENT THROUGHOUT THE
  REMAINDER OF THE DAY. 

* IMPACTS...ANY FIRES THAT DEVELOP MAY QUICKLY GET OUT OF CONTROL
  AND BECOME DIFFICULT TO CONTAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY DUE TO A COMBINATION
OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND DRY FUELS. ANY
FIRES THAT DEVELOP MAY QUICKLY GET OUT OF CONTROL AND BECOME
DIFFICULT TO CONTAIN.

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
901 
WWUS81 KPHI 152327
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
727 PM EDT WED APR 15 2015

NJZ001-007>010-012>015-PAZ054-055-060>062-070-071-101>106-160030-
/O.EXP.KPHI.FW.W.0001.000000T0000Z-150415T2300Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-CARBON-MONROE-BERKS-
LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER-
EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-
LOWER BUCKS-
727 PM EDT WED APR 15 2015

...RED FLAG WARNING HAS EXPIRED....

$$

Nearby

Red Flag Warnings in Pennsylvania, 2015Red Flag Warnings in New Jersey, 2015Every red flag warning in 2015

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.