Alert archive / Florida / Red Flag Warnings in 2008

Red Flag Warning 63, NWS Mobile, AL

October 18, 2008Walton County, Florida

NWS Mobile, AL issued this red flag warning at Oct 18, 2008, 5:36 AM CDT for Walton County, Florida. It took effect at Oct 18, 2008, 12:00 PM CDT. 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
Oct 18, 2008, 5:36 AM CDT (10:36 UTC)
In effect from
Oct 18, 2008, 12:00 PM CDT
Expired
Oct 18, 2008, 6:00 PM CDT
In force
6 hr
Issued by
NWS Mobile, AL

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 25 km from the middle of the area, began a volume at 10:37 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

Eglin AFB/Valpar, FL (KVPS), launched 00:00Z, 10.6 hours before the alert went out and 35 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, Eglin AFB/Valpar, FL at 00:00Z on 2008-10-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 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, Eglin AFB/Valpar, FL at 00:00Z on 2008-10-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -19 square meters per square second.193958Sfc1 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
8 J/kg
Mixed-layer CIN
-203 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-19 m²/s²
0-3 km storm-relative helicity
-21 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 
WWUS84 KMOB 181036
RFWMOB

RED FLAG WARNING
NATIONAL WEATHER SERVICE MOBILE AL
536 AM CDT SAT OCT 18 2008

...A RED FLAG WARNING IN EFFECT THIS AFTERNOON FOR THE WESTERN FLORIDA
PANHANDLE DUE TO THE POTENTIAL OF A LONG DURATION OF CRITICALLY LOW
AFTERNOON HUMIDITY BELOW 35 PERCENT...

...A FIRE WEATHER WATCH HAS BEEN ISSUED FOR SUNDAY FOR THE WESTERN
FLORIDA PANHANDLE DUE TO THE POTENTIAL OF A LONG DURATION OF
CRITICALLY LOW AFTERNOON HUMIDITY BELOW 35 PERCENT...

.AS A FRONT CONTINUES TO MOVE SOUTH OVER THE NORTHERN GULF OF
MEXICO...WITH A COOLER AND DRIER AIRMASS MOVING OVER THE AREA. THIS
AIRMASS WILL LAST OVER THE AREA INTO THE COMING WEEK...WITH AFTERNOON
RELATIVE HUMIDITY VALUES FALLING TO AROUND 30 PERCENT THIS AND SUNDAY
AFTERNOON. 

FLZ001>006-008-181900-
/O.UPG.KMOB.FW.A.0057.081018T1700Z-081018T2300Z/
/O.NEW.KMOB.FW.W.0063.081018T1700Z-081018T2300Z/
/O.NEW.KMOB.FW.A.0058.081019T1800Z-081019T2300Z/
INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA-
COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-
COASTAL WALTON-
536 AM CDT SAT OCT 18 2008

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM CDT THIS
AFTERNOON...
...FIRE WEATHER WATCH IN EFFECT SUNDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A RED FLAG
WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM CDT THIS
AFTERNOON. A FIRE WEATHER WATCH HAS ALSO BEEN ISSUED. THIS FIRE
WEATHER WATCH IS IN EFFECT SUNDAY AFTERNOON. THE FIRE WEATHER
WATCH IS NO LONGER IN EFFECT. 

RELATIVE HUMIDITIES WILL DROP TO NEAR 30 PERCENT ALONG AND NORTH OF
INTERSTATE 10 OVER THE NORTHWEST FLORIDA PANHANDLE AFTER THE NOON
HOUR THEN RETURN ABOVE CRITICAL LEVELS BY 6 PM.

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.

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE
RED FLAG WARNINGS.

$$
1 follow-up statement
000 
WWUS84 KMOB 181910
RFWMOB

RED FLAG WARNING
NATIONAL WEATHER SERVICE MOBILE AL
210 PM CDT SAT OCT 18 2008

...A RED FLAG WARNING REMAINS IN EFFECT THIS AFTERNOON FOR THE
WESTERN FLORIDA PANHANDLE DUE TO THE POTENTIAL OF A LONG DURATION OF
CRITICALLY LOW AFTERNOON HUMIDITY BELOW 35 PERCENT...

...A FIRE WEATHER WATCH REMAINS IN EFFECT FOR SUNDAY FOR THE WESTERN
FLORIDA PANHANDLE DUE TO THE POTENTIAL OF A LONG DURATION OF CRITICALLY
LOW AFTERNOON HUMIDITY BELOW 35 PERCENT...

.AS A FRONT HAS MOVED WELL SOUTH OF THE REGION...WITH A COOLER AND
DRIER AIRMASS MOVING INTO THE AREA. THIS AIRMASS WILL REMAIN OVER
THE REGION INTO THE EARLY PART WEEK...WITH LATE AFTERNOON RELATIVE
HUMIDITY VALUES FALLING TO 30 TO 35 PERCENT TODAY THEN TO AROUND 35
PERCENT ON SUNDAY AFTERNOON.

FLZ001>006-008-191115-
/O.CON.KMOB.FW.W.0063.000000T0000Z-081018T2300Z/
/O.CON.KMOB.FW.A.0058.081019T1800Z-081019T2300Z/
INLAND ESCAMBIA-COASTAL ESCAMBIA-INLAND SANTA ROSA-
COASTAL SANTA ROSA-INLAND OKALOOSA-COASTAL OKALOOSA-
COASTAL WALTON-
210 PM CDT SAT OCT 18 2008

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS
AFTERNOON...
...FIRE WEATHER WATCH REMAINS IN EFFECT SUNDAY AFTERNOON...

RELATIVE HUMIDITIES WILL DROP TO 30 TO 35 PERCENT ALONG AND NORTH OF
INTERSTATE 10 OVER THE NORTHWEST FLORIDA PANHANDLE LATE THIS
AFTERNOON THEN RETURN ABOVE CRITICAL LEVELS BY 6 PM.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF
GUSTY WINDS WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES
WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. LATE AFTERNOON RELATIVE
HUMIDITY VALUES WILL DROP TO AROUND 35 PERCENT ON SUNDAY AFTERNOON. 

A FIRE WEATHER WATCH MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE
FORECAST TO OCCUR. LISTEN FOR LATER FORECASTS AND POSSIBLE RED FLAG
WARNINGS.

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 18, 5:36 AM CDTFire Weather WatchMOBWalton25 hr

Nearby

Red Flag Warnings in Florida, 2008Every red flag warning in 2008

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.