Alert archive / Alabama / Areal Flood Advisories in 2021
Areal Flood Advisory 149, NWS Birmingham, AL
NWS Birmingham, AL issued this areal flood advisory at Sep 6, 2021, 4:43 PM CDT for Autauga County, Elmore County, Lowndes County, Alabama. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Sep 6, 2021, 4:43 PM CDT (21:43 UTC)
- Expired
- Sep 6, 2021, 6:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Autauga County, AL, Elmore County, AL, Lowndes County, AL
The radar
The Maxwell AFB radar (KMXX), 66 km from the middle of the area, began a volume at 21:47 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 nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.7 hours before the alert went out and 212 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
- 293 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 796 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 3:36 PM CDT | Areal Flood Advisory | BMX | Elmore | 3 hr |
Nearby
Areal Flood Advisories in Alabama, 2021Every areal flood advisory in 2021
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.