Alert archive / Alabama / Areal Flood Advisories in 2020
Areal Flood Advisory 21, NWS Birmingham, AL
NWS Birmingham, AL issued this areal flood advisory at Jan 14, 2020, 1:27 PM CST for Greene County, Pickens County, Sumter County, Alabama. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jan 14, 2020, 1:27 PM CST (19:27 UTC)
- Expired
- Jan 14, 2020, 4:30 PM CST
- In force
- 3 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
Counties Greene County, AL, Pickens County, AL, Sumter County, AL
The radar
The Columbus AFB radar (KGWX), 112 km from the middle of the area, began a volume at 19:28 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
Jackson, MS (KJAN), launched 12:00Z, 7.5 hours before the alert went out and 198 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
- 306 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 0.8
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Birmingham, AL wrote its last area forecast discussion before this areal flood advisory went out at Jan 13, 4:24 PM CST, 21 hours 3 minutes earlier.
Area forecast discussion, Jan 13, 4:24 PM CST, 21 hours 3 minutes before
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</html>The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 13, 6:48 PM CST | Areal Flood Advisory | BMX | Chilton, Coosa | 3 hr |
| Jan 14, 3:03 AM CST | Flash Flood Watch | BMX | Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more | 18 hr |
| Jan 14, 8:32 AM CST | Special Weather Statement | BMX | Greene | 43 min |
| Jan 14, 9:05 AM CST | Special Weather Statement | BMX | Hale | 40 min |
| Jan 14, 10:03 AM CST | Areal Flood Advisory | BMX | Fayette, Lamar, Marion, Winston | 3 hr |
| Jan 14, 10:37 AM CST | Areal Flood Advisory | BMX | Chilton, Coosa, Tallapoosa | 3 hr |
| Jan 14, 11:39 AM CST | Special Weather Statement | BMX | Autauga | 21 min |
| Jan 14, 12:02 PM CST | Special Weather Statement | BMX | Lowndes, Montgomery | 43 min |
| Jan 14, 12:47 PM CST | Special Weather Statement | BMX | Macon, Montgomery | 43 min |
| Jan 14, 2:10 PM CST | Special Weather Statement | BMX | Barbour, Pike | 65 min |
Nearby
Areal Flood Advisories in Alabama, 2020Every areal flood advisory 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.