Alert archive / Georgia / Tornado Watches in 2020
Tornado Watch 126
The Storm Prediction Center issued this tornado watch at Apr 20, 2020, 2:19 AM EDT for 15 counties in Florida; 24 counties in Georgia; 4 counties in South Carolina. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 20, 2020, 2:19 AM EDT (06:19 UTC)
- Expired
- Apr 20, 2020, 11:00 AM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 65 kt
All 43 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Tattnall County, GA, Ware County, GA, Wayne County, GA, Beaufort County, SC, Charleston County, SC, Colleton County, SC, Jasper County, SC
The radar
The Jacksonville radar (KJAX), 52 km from the middle of the area, began a volume at 06:23 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 2:59 AM EDT | Severe Thunderstorm Warning | JAX | Appling, Atkinson, Bacon, Brantley, Charlton, Clinch and 4 more | 46 min |
| Apr 20, 3:17 AM EDT | Severe Thunderstorm Warning | JAX | Appling, Atkinson, Bacon, Clinch, Coffee, Echols and 3 more | 43 min |
| Apr 20, 3:35 AM EDT | Severe Thunderstorm Warning | JAX | Appling, Bacon, Brantley, Camden, Charlton, Glynn and 3 more | 40 min |
| Apr 20, 3:50 AM EDT | Severe Thunderstorm Warning | CHS | Bryan, Liberty, Long | 40 min |
| Apr 20, 3:58 AM EDT | Severe Thunderstorm Warning | JAX | Appling, Atkinson, Bacon, Brantley, Clinch, Coffee and 4 more | 47 min |
| Apr 20, 4:38 AM EDT | Severe Thunderstorm Warning | JAX | Nassau | 23 min |
| Apr 20, 5:10 AM EDT | Severe Thunderstorm Warning | JAX | Brantley, Glynn, Wayne | 24 min |
| Apr 20, 5:15 AM EDT | Severe Thunderstorm Warning | CHS | Bryan, Liberty, McIntosh | 60 min |
| Apr 20, 5:34 AM EDT | Severe Thunderstorm Warning | JAX | Brantley, Camden, Glynn | 30 min |
| Apr 20, 6:09 AM EDT | Severe Thunderstorm Warning | JAX | Nassau | 33 min |
| Apr 20, 6:34 AM EDT | Severe Thunderstorm Warning | JAX | Columbia, Gilchrist, Suwannee, Union | 26 min |
| Apr 20, 6:54 AM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia, Suwannee, Union | 51 min |
| Apr 20, 7:44 AM EDT | Severe Thunderstorm Warning | JAX | Duval, Saint Johns | 18 min |
| Apr 20, 9:22 AM EDT | Severe Thunderstorm Warning | JAX | Marion | 38 min |
| Apr 20, 9:54 AM EDT | Severe Thunderstorm Warning | JAX | Marion | 51 min |
| Apr 20, 10:10 AM EDT | Tornado Warning | JAX | Marion | 12 min |
| Apr 20, 10:17 AM EDT | Tornado Warning | JAX | Marion | 8 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 00:00Z, 6.3 hours before the alert went out and 52 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
- 262 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1615 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 10:39 PM EDT | Tornado Watch | SPC | Escambia, Okaloosa, Santa Rosa | 5 hr |
| Apr 19, 10:53 PM EDT | Mesoscale Discussion | SPC | Gadsden, Holmes, Jackson, Walton, Washington | 67 min |
| Apr 19, 11:13 PM EDT | Tornado Watch | SPC | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more | 10 hr |
| Apr 20, 1:52 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 6 more | 83 min |
| Apr 20, 6:19 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 16 more | 86 min |
| Apr 20, 7:02 AM EDT | Severe Thunderstorm Watch | SPC | Brevard, Citrus, Hardee, Hernando, Hillsborough, Lake and 11 more | 8 hr |
| Apr 20, 8:18 AM EDT | Mesoscale Discussion | SPC | Alachua, Citrus, Flagler, Levy, Marion, Putnam and 2 more | 87 min |
| Apr 20, 11:06 AM EDT | Mesoscale Discussion | SPC | Brevard, Hardee, Hernando, Hillsborough, Indian River, Lake and 10 more | 114 min |
| Apr 20, 2:00 PM EDT | Mesoscale Discussion | SPC | DeSoto, Hardee, Highlands, Indian River, Manatee, Okeechobee and 4 more | 90 min |
| Apr 19, 9:25 PM EDT | Mesoscale Discussion | SPC | Baker, Calhoun, Chattahoochee, Clay, Early, Marion and 6 more | 65 min |
Nearby
Tornado Watches in Georgia, 2020Tornado Watches in Florida, 2020Tornado Watches in South Carolina, 2020Every tornado watch 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.