Alert archive / New Jersey / Red Flag Warnings in 2009

Red Flag Warning 2, NWS Philadelphia/Mount Holly

April 17, 20098 counties in New Jersey

NWS Philadelphia/Mount Holly issued this red flag warning at Apr 17, 2009, 4:35 AM EDT for 8 counties in New Jersey. It took effect at Apr 17, 2009, 12:00 PM EDT. It was in force for 60 min. 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 17, 2009, 4:35 AM EDT (08:35 UTC)
In effect from: Apr 17, 2009, 12:00 PM EDT
Expired: Apr 17, 2009, 1:00 PM EDT
In force: 60 min
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

The radar

The Philadelphia radar (KDIX), 78 km from the middle of the area, began a volume at 08:37 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, 8.6 hours before the alert went out and 151 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: 1698 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 80 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 170835
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
435 AM EDT FRI APR 17 2009

NJZ001-007>010-012>015-172300-
/O.NEW.KPHI.FW.W.0002.090417T1600Z-090417T2300Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-
435 AM EDT FRI APR 17 2009

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM EDT THIS
EVENING...

THE NATIONAL WEATHER SERVICE HAS ISSUED A RED FLAG WARNING. IT IS
IN EFFECT FROM NOON UNTIL 700 PM.

AS TEMPERATURES RISE INTO THE UPPER 60S AND LOWER 70S FOR THIS
AFTERNOON, RELATIVE HUMIDITY VALUES WILL DROP INTO THE 20S AND
PERHAPS THE TEENS AT SOME LOCATIONS. A WEST WIND IS FORECAST TO
INCREASE INTO THE 10 TO 15 MPH RANGE, WITH FREQUENT GUSTS AROUND
OR SLIGHTLY IN EXCESS OF 20 MPH ANTICIPATED. EVEN THOUGH THE
REGION RECEIVED SOME RAIN ON TUESDAY AND WEDNESDAY, CONDITIONS
REMAIN QUITE DRY.

DUE TO THE EXPECTED WIND GUSTS AND THE CONTINUED DRY CONDITIONS,
THE NATIONAL WEATHER SERVICE HAS ISSUED A RED FLAG WARNING FOR
THIS AFTERNOON INTO EARLY THIS EVENING. THERE IS AN INCREASED
POTENTIAL FOR THE INITIATION AND RAPID SPREAD OF BRUSH AND WILD
FIRES IN THE REGION.

WITH HIGH PRESSURE IN CONTROL, THE DRY CONDITIONS ARE EXPECTED TO 
CONTINUE INTO SATURDAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EXPECTED. A COMBINATION OF GUSTY WINDS AND LOW RELATIVE
HUMIDITY VALUES WILL CREATE ENHANCED FIRE GROWTH POTENTIAL.

&&

$$

IOVINO

1 follow-up statement

000 
WWUS81 KPHI 171700
RFWPHI

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
100 PM EDT FRI APR 17 2009


NJZ001-007>010-012>015-171800-
/O.CAN.KPHI.FW.W.0002.000000T0000Z-090417T2300Z/
SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-EASTERN MONMOUTH-MERCER-
100 PM EDT FRI APR 17 2009

...RED FLAG WARNING IS CANCELLED...

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

WINDS REMAINED FROM THE NORTHWEST AT 5 TO 10 MPH AND THERE WERE
INFREQUENT GUSTS AS HIGH AS 15 MPH EARLY THIS AFTERNOON.
THEREFORE, THE RED FLAG WARNING HAS BEEN CANCELED SINCE SUSTAINED
AND/OR FREQUENT GUSTS TO 20 MPH ARE NO LONGER ANTICIPATED. HOWEVER,
BRIEF ISOLATED WIND GUSTS TO 20 MPH REMAIN POSSIBLE OVER THE
HIGHER ELEVATIONS THIS AFTERNOON.

$$

RNS

Nearby

Red Flag Warnings in New Jersey, 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.