Alert archive / Alabama / Tornado Watches in 2020
Tornado Watch 502
The Storm Prediction Center issued this tornado watch at Oct 28, 2020, 1:03 PM CDT for 4 states. It was in force for 11 hr.
The area
The outline as issued.
The facts
- Issued
- Oct 28, 2020, 1:03 PM CDT (18:03 UTC)
- Expired
- Oct 29, 2020, 12:00 AM CDT
- In force
- 11 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Jefferson Parish, LA, Lafourche Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Tammany Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS
The radar
The Mobile radar (KMOB), 35 km from the middle of the area, began a volume at 18:03 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
- 40%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 5%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 20%
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 4:37 PM CDT | Tornado Warning | MOB | Escambia | 23 min |
| Oct 28, 6:21 PM CDT | Tornado Warning | MOB | Escambia, Santa Rosa | 24 min |
| Oct 28, 6:25 PM CDT | Tornado Warning | MOB | Baldwin | 20 min |
| Oct 28, 6:42 PM CDT | Tornado Warning | MOB | Santa Rosa | 33 min |
| Oct 28, 6:44 PM CDT | Tornado Warning | MOB | Baldwin | 31 min |
| Oct 28, 7:11 PM CDT | Tornado Warning | MOB | Escambia | 16 min |
| Oct 28, 7:47 PM CDT | Tornado Warning | MOB | Baldwin | 16 min |
| Oct 28, 8:43 PM CDT | Flash Flood Warning | MOB | Choctaw, Clarke, Mobile, Washington | 5 hr |
| Oct 28, 9:26 PM CDT | Flash Flood Warning | MOB | Choctaw, Clarke, Monroe, Wilcox | 5 hr |
| Oct 28, 11:08 PM CDT | Tornado Warning | MOB | Okaloosa | 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
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.1 hours before the alert went out and 162 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
- 1534 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 595 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 219 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 28, 11:26 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Choctaw, Clarke, Coffee, Conecuh and 8 more | 3 hr |
| Oct 28, 6:23 PM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Conecuh, Covington, Dallas and 7 more | 2 hr |
Nearby
Tornado Watches in Alabama, 2020Tornado Watches in Louisiana, 2020Tornado Watches in Mississippi, 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.