Alert archive / Florida / Mesoscale Discussions in 2011
Mesoscale Discussion 2137
The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2011, 6:24 PM EDT for 7 counties in Florida. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2011, 6:24 PM EDT (22:24 UTC)
- Expired
- Sep 5, 2011, 7:30 PM EDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
Counties Alachua County, FL, Baker County, FL, Columbia County, FL, Gilchrist County, FL, Hamilton County, FL, Levy County, FL, Union County, FL
The radar
The Jacksonville radar (KJAX), 108 km from the middle of the area, began a volume at 22:24 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
Jacksonville, FL (KJAX), launched 12:00Z, 10.4 hours before the alert went out and 109 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
- 1299 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 777 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
142
ACUS11 KWNS 052225
SWOMCD
SPC MCD 052224
FLZ000-GAZ000-052330-
MESOSCALE DISCUSSION 2137
NWS STORM PREDICTION CENTER NORMAN OK
0524 PM CDT MON SEP 05 2011
AREAS AFFECTED...NRN FL
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 052224Z - 052330Z
A LIMITED TEMPORAL/AREAL THREAT OF DMGG WINDS AND/OR AN ISOLATED
TORNADO EXISTS FOR PARTS OF NRN FL. IT IS UNCLEAR WHETHER A WW WILL
BE NECESSARY GIVEN THESE LIMITATIONS.
DEEP-LAYER FLOW HAS INCREASED ACROSS THE SOUTHEAST ATTENDANT TO THE
REMNANTS OF T.D. LEE AND AN UPPER TROUGH FARTHER NORTH. 18Z TLH
SOUNDING REFLECTS DEEP SLY WIND FIELDS...WITH SUFFICIENT BOUNDARY
LAYER MIXING TO CONTRIBUTE TO A DMGG WIND THREAT AS SLY WINDS REMAIN
NEAR 30 TO 35 KT AT 1 KM PER AREA VAD WIND PROFILE DATA. SMALL
BOWING SEGMENTS AND OCCASIONAL LOW-LEVEL ROTATION WILL BE POSSIBLE
IN STRONGER STORMS THAT CAN DEVELOP. HOWEVER...DRIER LOW LEVELS
FARTHER E TOWARD THE ATLANTIC COAST AND LINGERING CONVECTIVE
INHIBITION /DESPITE TEMPERATURES IN THE MID TO UPPER 80S F/ WILL
LIKELY LIMIT THE POSSIBILITY OF NEW SURFACE-BASED CONVECTION...AND
THE ASSOCIATED THREAT OF DMGG WINDS.
..HURLBUT.. 09/05/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...TBW...JAX...TAE...
LAT...LON 30298212 29328230 28958255 29018286 29268296 29828291
30568297 30628260 30538227 30298212SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 10:42 PM EDT | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa | 9 hr |
| Sep 5, 12:35 AM EDT | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 115 min |
| Sep 5, 5:26 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa and 3 more | 94 min |
| Sep 5, 6:35 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 9 more | 10 hr |
| Sep 5, 12:01 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 10 more | 29 min |
| Sep 5, 4:04 PM EDT | Severe Thunderstorm Watch | SPC | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more | 6 hr |
| Sep 5, 4:15 PM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Gadsden, Gulf, Holmes, Jackson and 9 more | 30 min |
Nearby
Mesoscale Discussions in Florida, 2011Every mesoscale discussion in 2011
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.