Alert archive / Florida / Mesoscale Discussions in 2024
Mesoscale Discussion 1813
The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2024, 10:32 AM EDT for 33 counties in Florida. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2024, 10:32 AM EDT (14:32 UTC)
- Expired
- Aug 4, 2024, 12:00 PM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...tornado watch likely
- Chance of a watch
- 95%
All 33 counties
Alachua County, FL, Bradford County, FL, Charlotte County, FL, Citrus County, FL, Collier County, FL, Columbia County, FL, DeSoto County, FL, Dixie County, FL, Gilchrist County, FL, Glades County, FL, Hamilton County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Jefferson County, FL, Lafayette County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Madison County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL
The radar
The Tampa radar (KTBW), 59 km from the middle of the area, began a volume at 14:33 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
Tampa Bay, FL (KTBW), launched 12:00Z, 2.5 hours before the alert went out and 59 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
- 374 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 679 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 362 m²/s²
- 0-3 km storm-relative helicity
- 327 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 7:47 AM EDT | Mesoscale Discussion | SPC | Charlotte, DeSoto, Hillsborough, Lee, Manatee, Pinellas and 1 more | 88 min |
| Aug 4, 10:57 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Charlotte, Citrus, Clay and 40 more | 9 hr |
| Aug 4, 1:47 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 36 more | 118 min |
| Aug 4, 4:53 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Charlotte, Citrus, Clay and 35 more | 2 hr |
| Aug 4, 7:05 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 39 more | 55 min |
| Aug 4, 7:57 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 31 more | 10 hr |
Nearby
Mesoscale Discussions in Florida, 2024Every mesoscale discussion in 2024
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.