Alert archive / Florida / Mesoscale Discussions in 2004
Mesoscale Discussion 1985
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2004, 2:21 AM EDT for 10 counties in Florida. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2004, 2:21 AM EDT (06:21 UTC)
- Expired
- Aug 13, 2004, 4:15 AM EDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
Counties Broward County, FL, Charlotte County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Lee County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 65 km from the middle of the area, began a volume at 06:20 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, 6.4 hours before the alert went out and 78 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
- 2493 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 1169 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
062 ACUS11 KWNS 130622 SWOMCD SPC MCD 130621 FLZ000-130815- MESOSCALE DISCUSSION 1985 NWS STORM PREDICTION CENTER NORMAN OK 0121 AM CDT FRI AUG 13 2004 AREAS AFFECTED...SRN FL CONCERNING...TORNADO WATCH 748... VALID 130621Z - 130815Z AS HURRICANE CHARLIE APPROACHES SRN FL LATE T0NIGHT...THE THREAT WILL EXIST FOR TORNADOES AND VERY HEAVY RAIN. KEY WEST FL RADAR CURRENTLY SHOWS HURRICANE CHARLIE NOW MOVING OFFSHORE FROM CUBA INTO THE GULF OF MEXICO. A HEAVY RAINBAND IS CURRENTLY MOVING NWD INTO SCNTRL FL AND DRY AIR SPIRALING INTO THE HURRICANE FROM THE SE WILL LIKELY RESULT IN A TEMPORARY LULL IN HEAVY RAINBAND ACTIVITY OVER FAR SRN FL FOR THE NEXT FEW HOURS. HOWEVER...AS THE EYE APPROACHES WRN FL LATE TONIGHT...HEAVY RAINBANDS JUST NORTH AND EAST OF THE EYE WILL ORGANIZE AND SPREAD INLAND ACROSS SOUTH FL. FORECAST SOUNDINGS FOR KEY WEST LATE TONIGHT SHOW STRONGLY VEERED WIND PROFILES FROM THE SFC TO 2 KM. THIS COMBINED WITH MLCAPE VALUES OF 1500 TO 2500 J/KG WILL BE FAVORABLE FOR AN ISOLATED TORNADO THREAT. THE THREAT WILL CONTINUE THROUGH DAYBREAK AS THE EYEWALL MOVES NWD IN THE GULF OF MEXICO SW OF THE FL KEYS. ..BROYLES.. 08/13/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...MFL...MLB...EYW...TBW... 25967969 24827979 24048014 23888141 24208237 25108265 25938262 26978236 27288151 27198055 26857985
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 9:00 PM EDT | Mesoscale Discussion | SPC | Charlotte, Collier, Hendry, Lee, Miami-Dade, Monroe | 3 hr |
| Aug 12, 9:35 PM EDT | Tornado Watch | SPC | Broward, Charlotte, Collier, Glades, Hendry, Lee and 4 more | 10 hr |
| Aug 13, 6:46 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 15 more | 119 min |
| Aug 13, 7:30 AM EDT | Tornado Watch | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 15 more | 10 hr |
| Aug 13, 11:04 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hardee and 15 more | 86 min |
| Aug 13, 1:02 PM EDT | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 26 more | 88 min |
| Aug 13, 1:45 PM EDT | Tornado Watch | SPC | Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 29 more | 12 hr |
| Aug 13, 4:06 PM EDT | Mesoscale Discussion | SPC | Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 29 more | 84 min |
| Aug 13, 6:14 PM EDT | Mesoscale Discussion | SPC | Broward, Citrus, Collier, Glades, Hardee, Hendry and 14 more | 61 min |
Nearby
Mesoscale Discussions in Florida, 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; radar from the NEXRAD Level II archive.