Alert archive / Florida / Mesoscale Discussions in 2007
Mesoscale Discussion 151
The Storm Prediction Center issued this mesoscale discussion at Feb 13, 2007, 12:08 PM CST for 5 counties in Alabama; 17 counties in Florida; 8 counties in Georgia. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Feb 13, 2007, 12:08 PM CST (18:08 UTC)
- Expired
- Feb 13, 2007, 1:15 PM CST
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 30 counties
Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Dixie County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Brooks County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Lowndes County, GA, Miller County, GA, Seminole County, GA, Thomas County, GA
The radar
The Tallahassee radar (KTLH), 21 km from the middle of the area, began a volume at 18:12 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 6.1 hours before the alert went out and 23 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.
- Mixed-layer CAPE
- 10 J/kg
- Mixed-layer CIN
- -254 J/kg
- Mixed-layer LCL
- 731 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 131808 SWOMCD SPC MCD 131808 FLZ000-GAZ000-ALZ000-131915- MESOSCALE DISCUSSION 0151 NWS STORM PREDICTION CENTER NORMAN OK 1208 PM CST TUE FEB 13 2007 AREAS AFFECTED...FL PANHANDLE...SERN AL...SWRN GA CONCERNING...TORNADO WATCH 20... VALID 131808Z - 131915Z AIRMASS HAS STRUGGLED TO DESTABILIZE SIGNIFICANTLY INLAND ACROSS MUCH OF THE FL PANHANDLE...AHEAD OF THUNDERSTORM ACTIVITY OVER WRN PORTIONS OF WW. HOWEVER...STRONG LOW-MID LEVEL SHEAR REMAINS SUPPORTIVE FOR MAINTAINING DISCRETE UPDRAFTS...INCLUDING ISOLATED SUPERCELLS. STRONGEST SUPERCELL HAS MOVED INLAND OVER BAY COUNTY FL...WHILE UPSTREAM STORMS OVER NWRN PORTIONS OF WW ARE MORE COMPLEX WITH A PSEUDO SQUALL LINE NOW EVOLVING AS FLOW VEERS THROUGH A DEEPER LAYER. IN THE SHORT TERM...IT APPEARS STRONGEST LOW LEVEL WARM ADVECTION...AND GREATEST TORNADO POTENTIAL...WILL REMAIN WITH MORE DISCRETE STORMS AHEAD OF SQUALL LINE. ..DARROW.. 02/13/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...TBW...JAX...TAE...BMX...MOB... 30068645 30388643 30388611 30488639 30988638 30998618 31598613 31608542 31708538 31758511 31498501 31488479 31428462 31268462 31258452 31078452 31068398 31008317 30958316 30938305 30868301 30778311 30618313 30618327 30398319 30248325 30128320 29958295 29828290 29598294 29358306 29188349 29538382 29728405 29568435 29338478 29258505 29348539 29528565 29748575 30008622
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 2:05 AM CST | Mesoscale Discussion | SPC | Mobile, Washington | 55 min |
| Feb 13, 2:43 AM CST | Tornado Watch | SPC | Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more | 10 hr |
| Feb 13, 4:50 AM CST | Mesoscale Discussion | SPC | Dallas, Greene, Hale, Marengo, Perry, Sumter | 85 min |
| Feb 13, 5:26 AM CST | Mesoscale Discussion | SPC | Mobile, Washington | 94 min |
| Feb 13, 7:24 AM CST | Mesoscale Discussion | SPC | Baldwin, Conecuh, Escambia, Mobile, Monroe | 96 min |
| Feb 13, 9:07 AM CST | Tornado Watch | SPC | Coffee, Dale, Geneva, Henry, Houston | 7 hr |
| Feb 13, 11:03 AM CST | Mesoscale Discussion | SPC | Colbert, Franklin, Lamar, Marion | 87 min |
| Feb 13, 12:49 PM CST | Severe Thunderstorm Watch | SPC | Autauga, Bibb, Blount, Chilton, Colbert, Cullman and 21 more | 6 hr |
| Feb 13, 5:09 PM CST | Mesoscale Discussion | SPC | Autauga, Bibb, Blount, Bullock, Butler, Chilton and 21 more | 96 min |
| Feb 13, 5:18 PM CST | Tornado Watch | SPC | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 29 more | 4 hr |
| Feb 13, 8:52 AM CST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 8 more | 53 min |
| Feb 13, 10:17 AM CST | Mesoscale Discussion | SPC | Charlotte, DeSoto, Hardee, Hernando, Hillsborough, Lee and 5 more | 88 min |
| Feb 13, 11:54 AM CST | Severe Thunderstorm Watch | SPC | Brevard, Charlotte, Citrus, DeSoto, Flagler, Glades and 25 more | 5 hr |
| Feb 13, 2:15 PM CST | Mesoscale Discussion | SPC | Brevard, Flagler, Glades, Hardee, Highlands, Indian River and 8 more | 60 min |
| Feb 13, 2:34 PM CST | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 5 more | 5 hr |
| Feb 13, 1:14 PM CST | Mesoscale Discussion | SPC | Atkinson, Bacon, Baldwin, Ben Hill, Berrien, Bibb and 24 more | 91 min |
| Feb 13, 3:54 PM CST | Tornado Watch | SPC | Burke, Columbia, Lincoln, McDuffie, Richmond | 7 hr |
Nearby
Mesoscale Discussions in Florida, 2007Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in Alabama, 2007Every mesoscale discussion 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.