Alert archive / New Jersey / Red Flag Warnings in 2009

Red Flag Warning 3, NWS Philadelphia/Mount Holly

April 28, 20094 states

NWS Philadelphia/Mount Holly issued this red flag warning at Apr 28, 2009, 10:34 AM EDT for 4 states. It took effect at Apr 28, 2009, 12:00 PM EDT. It was in force for 8 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 28, 2009, 10:34 AM EDT (14:34 UTC)
In effect from: Apr 28, 2009, 12:00 PM EDT
Expired: Apr 28, 2009, 8:00 PM EDT
In force: 8 hr
Issued by: NWS Philadelphia/Mount Holly

All 31 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, 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), 67 km from the middle of the area, began a volume at 14:34 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, 2.6 hours before the alert went out and 94 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2016 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 82 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.

000 
WWUS81 KPHI 281434
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1034 AM EDT TUE APR 28 2009

DEZ001>004-MDZ008-012-015-019-020-NJZ001-007>010-012>027-PAZ054-
055-060>062-067>071-290000-
/O.NEW.KPHI.FW.W.0003.090428T1600Z-090429T0000Z/
NEW CASTLE-KENT-INLAND SUSSEX-DELAWARE BEACHES-CECIL-KENT MD-
QUEEN ANNES-TALBOT-CAROLINE-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-
1034 AM EDT TUE APR 28 2009

...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. 

TEMPERATURES ARE EXPECTED TO RISE INTO THE UPPER 80S TO LOWER 90S
THIS AFTERNOON WITH RELATIVE HUMIDITIES EXPECTED TO DROP INTO THE
MID 20S. WEST TO SOUTHWEST WINDS SUSTAINED AT AROUND 15 MPH, WITH
GUSTS OF 20 MPH OR HIGHER ARE EXPECTED THROUGHOUT THIS AFTERNOON.

WITH 10 HOUR FUEL MOISTURES LESS THAN 10 PERCENT AND THE CONTINUED
DRY CONDITIONS, THE NATIONAL WEATHER SERVICE HAS ISSUED A RED
FLAG WARNING FOR THIS AFTERNOON INTO THIS EVENING. 

A COLD FRONT IS EXPECTED TO CROSS THE REGION LATE TONIGHT,
REDUCING THE THREAT FOR FIRES.

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.

&&

$$

MEOLA/GIGI

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 3:35 PM EDT	Small Craft Advisory	PHI		39 hr

Nearby

Red Flag Warnings in New Jersey, 2009 Red Flag Warnings in Pennsylvania, 2009 Red Flag Warnings in Maryland, 2009 Every red flag warning in 2009

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.