Alert archive / Florida / Mesoscale Discussions in 2004

Mesoscale Discussion 45

January 26, 200410 counties in Florida; 9 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Jan 26, 2004, 3:00 PM EST for 10 counties in Florida; 9 counties in Georgia. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jan 26, 2004, 3:00 PM EST (20:00 UTC)
Expired
Jan 26, 2004, 4:00 PM EST
In force
60 min
Issued by
the Storm Prediction Center

Counties Baker County, FL, Columbia County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Atkinson County, GA, Brantley County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Lanier County, GA, Lowndes County, GA, Pierce County, GA, Ware County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 8.0 hours before the alert went out and 112 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, Jacksonville, FL at 12:00Z on 2004-01-26Temperature 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, Jacksonville, FL at 12:00Z on 2004-01-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 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
899 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
232 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.

637 
ACUS11 KWNS 262000
SWOMCD
SPC MCD 262000 
FLZ000-GAZ000-262100-

MESOSCALE DISCUSSION 0045
NWS STORM PREDICTION CENTER NORMAN OK
0200 PM CST MON JAN 26 2004

AREAS AFFECTED...NRN FL / SERN GA

CONCERNING...TORNADO WATCH 3...

VALID 262000Z - 262100Z

MAIN AREA OF THUNDERSTORMS CONTINUES MOVING EWD ACROSS SRN GA / NRN
FL TOWARD LESS UNSTABLE AIRMASS.  SEVERE THREAT APPEARS TO BE
DECREASING...ALTHOUGH LOCALIZED THREAT -- PARTICULARLY ACROSS THE
ERN PANHANDLE -- WILL CONTINUE FOR THE NEXT 1 TO 2 HOURS.

COLD FRONT CONTINUES MOVING SLOWLY SWD ACROSS SRN GA...AND MAIN
CONVECTIVE LINE HAS NOW REACHED THE ERN FL PANHANDLE -- EAST OF AXIS
OF GREATEST INSTABILITY.  ALTHOUGH SOME INSTABILITY REMAINS ACROSS
SRN GA / NRN FL EAST OF CONVECTIVE LINE AND SOUTH OF COLD
FRONT...CONTINUED SWD MOTION OF FRONT AND THE ONSET OF DIURNAL
AIRMASS STABILIZATION SHOULD RESULT IN A DECREASE IN SEVERE THREAT
WITH TIME.  

THE THREAT FOR A LOCALIZED SEVERE EVENT WILL REMAIN FOR THE NEXT 1
TO 2 HOURS ACROSS FAR SERN GA / NRN FL SOUTH OF COLD FRONT / EAST OF
MAIN CONVECTIVE LINE.  HOWEVER...IT APPEARS ATTM THAT FOR THE
REMAINDER OF THE AFTERNOON THE SEVERE THREAT SHOULD BE SUFFICIENTLY
LIMITED TO PRECLUDE THE NEED FOR AN ADDITIONAL WATCH BEYOND THE
EXPIRATION OF WW 003.

..GOSS.. 01/26/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...JAX...TAE...

31328298 31378191 30798158 30078185 29738348 30088404
30338409

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 26, 3:10 AM ESTMesoscale DiscussionSPCBay, Calhoun, Escambia, Gadsden, Gulf, Holmes and 8 more3 hr
Jan 26, 5:15 AM ESTTornado WatchSPCBay, Calhoun, Escambia, Gadsden, Holmes, Jackson and 5 more6 hr
Jan 26, 8:00 AM ESTMesoscale DiscussionSPCBay, Calhoun, Escambia, Gadsden, Holmes, Jackson and 5 more2 hr
Jan 26, 10:30 AM ESTTornado WatchSPCBay, Calhoun, Gadsden, Gulf, Holmes, Jackson and 8 more6 hr
Jan 26, 12:10 PM ESTMesoscale DiscussionSPCBay, Gulf65 min
Jan 26, 4:15 AM ESTMesoscale DiscussionSPCClarke, Columbia, Elbert, Glascock, Greene, Hancock and 14 more6 hr
Jan 26, 5:57 PM ESTMesoscale DiscussionSPCBanks, Barrow, Clarke, Elbert, Franklin, Greene and 13 more5 hr

Nearby

Mesoscale Discussions in Florida, 2004Mesoscale Discussions in Georgia, 2004Every mesoscale discussion in 2004

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.