Alert archive / Florida / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 23, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Feb 6, 2020, 10:42 PM EST for 5 counties in Florida. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 6, 2020, 10:42 PM EST (03:42 UTC)
- Expired
- Feb 6, 2020, 11:30 PM EST
- In force
- 48 min
- Issued by
- NWS Jacksonville, FL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Clay County, FL, Duval County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL
The radar
The Jacksonville radar (KJAX), 44 km from the middle of the area, began a volume at 03:41 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 6, 5:30 PM EST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Jacksonville, FL (KJAX), launched 00:00Z, 3.7 hours before the alert went out and 46 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
- 301 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1234 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 344 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 1.9
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 6, 8:58 PM EST, 1 hour 44 minutes earlier.
Area forecast discussion, Feb 6, 8:58 PM EST, 1 hour 44 minutes before
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Local storm report, Feb 6, 10:19 PM EST, 23 minutes before
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</html>The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 6, 7:04 PM EST | Severe Thunderstorm Warning | JAX | Hamilton, Suwannee | 56 min |
| Feb 6, 7:42 PM EST | Severe Thunderstorm Warning | JAX | Baker, Columbia, Hamilton, Suwannee | 63 min |
| Feb 6, 8:00 PM EST | Severe Thunderstorm Warning | JAX | Columbia, Hamilton, Suwannee | 45 min |
| Feb 6, 8:41 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Baker, Columbia, Gilchrist, Hamilton, Suwannee and 1 more | 49 min |
| Feb 6, 8:51 PM EST | Tornado Warning | JAX | Baker, Columbia, Hamilton | 39 min |
| Feb 6, 8:55 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Gilchrist | 50 min |
| Feb 6, 9:22 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Baker, Bradford, Clay, Duval, Gilchrist and 3 more | 38 min |
| Feb 6, 9:28 PM EST | Severe Thunderstorm Warning | JAX | Nassau | 47 min |
| Feb 6, 9:34 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Marion | 41 min |
| Feb 6, 9:43 PM EST | Special Marine Warning | JAX | 2 hr | |
| Feb 6, 9:54 PM EST | Severe Thunderstorm Warning | JAX | Nassau | 51 min |
| Feb 6, 9:56 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Bradford, Clay, Duval, Nassau, Putnam and 1 more | 49 min |
| Feb 6, 10:00 PM EST | Special Marine Warning | JAX | 2 hr | |
| Feb 6, 10:11 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Marion, Putnam | 49 min |
| Feb 6, 10:57 PM EST | Severe Thunderstorm Warning | JAX | Flagler, Marion, Putnam, Saint Johns | 63 min |
| Feb 6, 11:45 PM EST | Special Marine Warning | JAX | 30 min | |
| Feb 6, 11:50 PM EST | Special Marine Warning | JAX | 115 min | |
| Feb 6, 11:59 PM EST | Severe Thunderstorm Warning | JAX | Flagler | 16 min |
| Feb 7, 3:29 AM EST | Wind Advisory | JAX | Alachua, Baker, Bradford, Duval, Flagler, Gilchrist and 4 more | 10 hr |
| Feb 7, 1:52 PM EST | Frost Advisory | JAX | Alachua, Baker, Bradford, Gilchrist, Marion, Nassau and 2 more | 19 hr |
| Feb 7, 1:53 PM EST | Small Craft Advisory | JAX | 7 hr | |
| Feb 6, 7:09 PM EST | Severe Thunderstorm Warning | JAX | Appling, Jeff Davis | 51 min |
| Feb 6, 7:16 PM EST | Severe Thunderstorm Warning | JAX | Appling, Bacon, Coffee, Jeff Davis | 44 min |
| Feb 6, 7:18 PM EST | Severe Thunderstorm Warning | JAX | Clinch, Echols | 57 min |
| Feb 6, 7:34 PM EST | Tornado Warning | JAX | Atkinson, Bacon, Clinch, Coffee, Pierce, Ware | 26 min |
| Feb 6, 7:52 PM EST | Severe Thunderstorm Warning | JAX | Appling, Atkinson, Bacon, Clinch, Coffee, Jeff Davis and 3 more | 38 min |
| Feb 6, 7:58 PM EST | Severe Thunderstorm Warning | JAX | Appling, Brantley, Charlton, Clinch, Glynn, Pierce and 2 more | 47 min |
| Feb 6, 8:29 PM EST | Severe Thunderstorm Warning | JAX | Appling, Bacon, Pierce, Wayne | 33 min |
| Feb 6, 8:45 PM EST | Severe Thunderstorm Warning | JAX | Brantley, Charlton, Clinch, Echols, Pierce, Ware | 45 min |
| Feb 6, 9:07 PM EST | Severe Thunderstorm Warning | JAX | Brantley, Glynn, Pierce, Wayne | 38 min |
| Feb 6, 9:18 PM EST | Severe Thunderstorm Warning | JAX | Brantley, Camden, Charlton, Glynn, Wayne | 42 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2020Every severe thunderstorm warning in 2020
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.