Alert archive / Alabama / Areal Flood Advisories in 2021
Areal Flood Advisory 76, NWS Birmingham, AL
NWS Birmingham, AL issued this areal flood advisory at Jul 19, 2021, 1:58 PM CDT for Blount County, Alabama. It was in force for 107 min.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2021, 1:58 PM CDT (18:58 UTC)
- Expired
- Jul 19, 2021, 3:45 PM CDT
- In force
- 107 min
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
County Blount County, AL
The radar
The Birmingham radar (KBMX), 92 km from the middle of the area, began a volume at 18:59 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, 7.0 hours before the alert went out and 203 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
- 73 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 779 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 19, 12:45 PM CDT, 1 hour 13 minutes earlier.
Area forecast discussion, Jul 19, 12:45 PM CDT, 1 hour 13 minutes before
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</html>Hazardous weather outlook, Jul 19, 4:42 AM CDT, 9 hours 16 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 442 AM CDT Mon Jul 19 2021 ALZ011>015-017>050-201245- Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee- Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega- Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa- Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon- Bullock-Lee-Russell-Pike-Barbour- 442 AM CDT Mon Jul 19 2021 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Outlook through Tonight. Periods of heavy rain at times may occur through tonight across portions of Central Alabama. This could cause isolated areas of flooding and ponding of water in low lying areas. Use caution and allow extra time for travel. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management may be needed through tonight. 08
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 7:25 PM CDT | Areal Flood Advisory | BMX | Talladega | 2 hr |
| Jul 18, 7:30 PM CDT | Areal Flood Advisory | BMX | Jefferson | 2 hr |
| Jul 18, 9:00 PM CDT | Areal Flood Advisory | BMX | Etowah | 3 hr |
| Jul 19, 5:15 AM CDT | Special Weather Statement | BMX | Sumter | 60 min |
| Jul 19, 6:00 AM CDT | Areal Flood Advisory | BMX | Bibb, Jefferson, Shelby | 3 hr |
| Jul 19, 4:55 PM CDT | Flash Flood Warning | BMX | Jefferson | 4 hr |
| Jul 19, 5:56 PM CDT | Areal Flood Advisory | BMX | St. Clair, Shelby, Talladega | 2 hr |
| Jul 19, 6:27 PM CDT | Flash Flood Warning | BMX | Jefferson, Shelby | 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.