Alert archive / Florida / Red Flag Warnings in 2007

Red Flag Warning 4, NWS Miami, FL

January 31, 20074 counties in Florida

NWS Miami, FL issued this red flag warning at Jan 31, 2007, 4:23 AM EST for 4 counties in Florida. It took effect at Jan 31, 2007, 1:00 PM EST. It was in force for 4 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
Jan 31, 2007, 4:23 AM EST (09:23 UTC)
In effect from
Jan 31, 2007, 1:00 PM EST
Expired
Jan 31, 2007, 5:00 PM EST
In force
4 hr
Issued by
NWS Miami, FL

Counties Broward County, FL, Collier County, FL, Miami-Dade County, FL, Monroe County, FL

The radar

The Miami radar (KAMX), 48 km from the middle of the area, began a volume at 09:22 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

Miami, FL (KMFL), launched 00:00Z, 9.4 hours before the alert went out and 53 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, Miami, FL at 00:00Z on 2007-01-31Temperature 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, Miami, FL at 00:00Z on 2007-01-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939587897117Sfc1 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
1342 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
83 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 
WWUS82 KMFL 310923
RFWMFL

RED FLAG WARNING
NATIONAL WEATHER SERVICE MIAMI FL
423 AM EST WED JAN 31 2007

FLZ063-066-067-069>071-073-075-312200-
/O.UPG.KMFL.FW.A.0004.070131T1700Z-070131T2300Z/
/O.NEW.KMFL.FW.W.0004.070131T1800Z-070131T2200Z/
GLADES-HENDRY-PALM BEACH WESTERN-WESTERN COLLIER-EASTERN COLLIER-
WESTERN BROWARD-WESTERN DADE-MAINLAND MONROE-
423 AM EST WED JAN 31 2007

...RED FLAG WARNING IN EFFECT FROM 1 PM TO 5 PM EST THIS
AFTERNOON FOR RELATIVE HUMIDITIES BELOW 35 PERCENT FOR
4 HOURS...

THE NATIONAL WEATHER SERVICE IN MIAMI HAS UPGRADED THE FIRE
WEATHER WATCH TO A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1
PM TO 5 PM EST THIS AFTERNOON. ALL BUT THE EAST COAST ZONES ARE
INCLUDED IN THIS RED FLAG WARNING FOR THIS AFTERNOON.

DRY AIR ABOVE THE SURFACE IS FORECAST TO MIX DOWN TO THE SURFACE
DURING THE AFTERNOON ACROSS MUCH OF INTERIOR AND GULF COASTAL
SECTIONS OF MAINLAND SOUTH FLORIDA. THIS WILL RESULT IN RELATIVE
HUMIDITIES BELOW 35 PERCENT FOR ABOUT 4 HOURS ACROSS THE AREA THIS
AFTERNOON. EAST COASTAL ZONES ARE EXCLUDED FROM THIS WARNING...DUE
TO THE EXPECTATION OF MOISTENING CAUSED BY AN ONSHORE WIND
DEVELOPING DURING THE AFTERNOON.

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EXPECTED. LOW RELATIVE HUMIDITY WILL CREATE EXPLOSIVE FIRE
GROWTH POTENTIAL.

$$

GREGORIA/BAXTER

Nearby

Red Flag Warnings in Florida, 2007Every red flag warning in 2007

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.