Alert archive / Florida / Mesoscale Discussions in 2017
Mesoscale Discussion 823
The Storm Prediction Center issued this mesoscale discussion at May 24, 2017, 6:30 AM EDT for 39 counties in Florida. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2017, 6:30 AM EDT (10:30 UTC)
- Expired
- May 24, 2017, 8:30 AM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 39 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, DeSoto County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Hardee County, FL, Hernando County, FL, Hillsborough County, FL, Jefferson County, FL, Lafayette County, FL, Lake County, FL, Levy County, FL, Madison County, FL, Manatee County, FL, Marion County, FL, Nassau County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Wakulla County, FL
The radar
The Jacksonville radar (KJAX), 148 km from the middle of the area, began a volume at 10:30 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
Jacksonville, FL (KJAX), launched 00:00Z, 10.5 hours before the alert went out and 150 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
- 924 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 1107 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 260 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 10.7
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 |
|---|---|---|---|---|
| May 24, 3:45 AM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Clay, Duval, Gilchrist, Levy and 3 more | 2 hr |
| May 24, 6:56 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 30 more | 8 hr |
| May 24, 10:26 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 32 more | 94 min |
| May 24, 11:03 AM EDT | Tornado Watch | SPC | Baker, Columbia, Duval, Hamilton, Nassau, Suwannee | 10 hr |
| May 24, 12:54 PM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Brevard, Broward, Charlotte, Citrus and 30 more | 2 hr |
| May 24, 2:10 PM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Hamilton, Madison, Nassau and 1 more | 95 min |
| May 24, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | Brevard, Broward, Charlotte, Clay, Collier, DeSoto and 23 more | 7 hr |
| May 24, 5:25 PM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Hamilton, Madison, Nassau and 2 more | 65 min |
Nearby
Mesoscale Discussions in Florida, 2017Every mesoscale discussion in 2017
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.