Alert archive / Florida / Red Flag Warnings in 2009

Red Flag Warning 48, NWS Jacksonville, FL

April 15, 20096 counties in Florida

NWS Jacksonville, FL issued this red flag warning at Apr 15, 2009, 4:37 AM EDT for 6 counties in Florida. It took effect at Apr 15, 2009, 12:00 PM EDT. 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: Apr 15, 2009, 4:37 AM EDT (08:37 UTC)
In effect from: Apr 15, 2009, 12:00 PM EDT
Expired: Apr 15, 2009, 6:00 PM EDT
In force: 6 hr
Issued by: NWS Jacksonville, FL

Counties Baker County, FL, Bradford County, FL, Flagler County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL

The radar

The Jacksonville radar (KJAX), 60 km from the middle of the area, began a volume at 08:38 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.6 hours before the alert went out and 209 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: 1855 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jacksonville, FL wrote its last area forecast discussion before this red flag warning went out at Apr 15, 3:55 AM EDT, 42 minutes earlier.

Area forecast discussion, Apr 15, 3:55 AM EDT, 42 minutes before

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Hazardous weather outlook, Apr 15, 3:47 AM EDT, 50 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
347 AM EDT WED APR 15 2009

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-161000-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-
ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-
JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-
INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-
COASTAL CAMDEN-
347 AM EDT WED APR 15 2009

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

...FLOOD WARNINGS REMAIN IN EFFECT FOR VARIOUS RIVERS ACROSS
SOUTHEAST GEORGIA AND NORTHEAST FLORIDA...

THE RECENT HEAVY RAINFALL MAY AGGRAVATE THE FLOODING SITUATION
ACROSS SOUTHEAST GEORGIA AND THE SUWANNEE RIVER VALLEY OF NORTH
FLORIDA. RESIDENTS ACROSS THE AREA ARE URGED TO MONITOR THE LATEST
FORECASTS AND RIVER FLOOD PRODUCTS.

SIGNIFICANT RISES WILL CONTINUE ON THE SANTA FE RIVER AT BOTH THREE
RIVERS ESTATES AND HILDRETH. PLEASE REFER TO THE LATEST RIVER FLOOD
PRODUCTS FOR COMPLETE DETAILS.

DRIER AIR OVER THE REGION WILL ENHANCE THE FIRE DANGER ACROSS
NORTHEAST FLORIDA AND RED FLAG WARNINGS ARE IN EFFECT THIS
AFTERNOON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

AN INCREASING ONSHORE FLOW AND NORTHEAST SWELLS WILL LIKELY ELEVATE
THE RISK OF RIP CURRENTS FROM THURSDAY INTO THE WEEKEND.

DRIER AIR WILL LINGER OVER THE REGION ON THURSDAY AND ENHANCE THE
FIRE DANGER ACROSS INLAND NORTHEAST FLORIDA THURSDAY AFTERNOON.

THE NEXT COLD FRONT WILL BRING A CHANCE OF THUNDERSTORMS TO THE
AREA LATE SUNDAY INTO MONDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE
IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 15, 4:37 AM EDT	Fire Weather Watch	JAX	Gilchrist, Suwannee, Union	24 hr
Apr 15, 2:20 PM EDT	Small Craft Advisory	JAX		62 hr
Apr 15, 5:03 PM EDT	Areal Flood Warning	JAX	Glynn	23 hr

Nearby

Red Flag Warnings in Florida, 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.