Alert archive / Alabama / Areal Flood Advisories in 2021
Areal Flood Advisory 7, NWS Birmingham, AL
NWS Birmingham, AL issued this areal flood advisory at Mar 16, 2021, 12:06 PM CDT for Dallas County, Alabama. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Mar 16, 2021, 12:06 PM CDT (17:06 UTC)
- Expired
- Mar 16, 2021, 3:15 PM CDT
- In force
- 3 hr
- Issued by
- NWS Birmingham, AL
- Area
- Storm-based polygon
County Dallas County, AL
The radar
The Birmingham radar (KBMX), 99 km from the middle of the area, began a volume at 17:05 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
Birmingham, AL (KBMX), launched 12:00Z, 5.1 hours before the alert went out and 100 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
- 181 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 194 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
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 Mar 16, 6:35 AM CDT, 5 hours 31 minutes earlier.
Area forecast discussion, Mar 16, 6:35 AM CDT, 5 hours 31 minutes before
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</html>Hazardous weather outlook, Mar 16, 3:51 AM CDT, 8 hours 15 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 351 AM CDT Tue Mar 16 2021 ALZ011>015-017>050-171200- 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- 351 AM CDT Tue Mar 16 2021 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Outlook through Tonight. Severe thunderstorms are possible today through 9 PM this evening across Central Alabama. Damaging winds and large hail are the main threats. A brief tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Severe thunderstorms are likely Wednesday afternoon into early Thursday morning. Threats include strong tornadoes, large hail up to golf ball size, and damaging winds up to 80 mph. Stay tuned for forecast updates. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management may be needed today and this evening and again on Wednesday into the pre-dawn hours on Thursday. Please follow all local, state, and CDC guidelines in regards to travel. 08
In the hours before
Special weather statement, Mar 16, 6:09 AM CDT, 5 hours 57 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 |
|---|---|---|---|---|
| Mar 15, 9:32 PM CDT | Severe Thunderstorm Warning | BMX | Etowah | 19 min |
| Mar 16, 1:18 AM CDT | Special Weather Statement | BMX | Marion | 57 min |
| Mar 16, 1:59 AM CDT | Special Weather Statement | BMX | Marion | 31 min |
| Mar 16, 2:20 AM CDT | Special Weather Statement | BMX | Marengo | 40 min |
| Mar 16, 3:15 AM CDT | Special Weather Statement | BMX | Marengo | 30 min |
| Mar 16, 3:22 AM CDT | Severe Thunderstorm Warning | BMX | Marengo | 38 min |
| Mar 16, 3:32 AM CDT | Areal Flood Advisory | BMX | Marengo | 3 hr |
| Mar 16, 3:41 AM CDT | Tornado Warning | BMX | Marengo | 34 min |
| Mar 16, 6:09 AM CDT | Special Weather Statement | BMX | Dallas | 51 min |
| Mar 16, 9:44 AM CDT | Areal Flood Advisory | BMX | Marengo | 3 hr |
| Mar 16, 10:06 AM CDT | River Flood Warning | BMX | Greene, Hale, Marengo | 7 days |
| Mar 16, 10:58 AM CDT | Areal Flood Advisory | BMX | Dallas, Perry | 3 hr |
| Mar 16, 12:58 PM CDT | Special Weather Statement | BMX | Lowndes | 47 min |
| Mar 16, 1:24 PM CDT | Special Weather Statement | BMX | Montgomery | 36 min |
| Mar 16, 2:00 PM CDT | Special Weather Statement | BMX | Bullock | 45 min |
| Mar 16, 2:24 PM CDT | Severe Thunderstorm Warning | BMX | Bullock, Pike | 36 min |
| Mar 16, 3:00 PM CDT | Special Weather Statement | BMX | Barbour | 45 min |
| Mar 16, 3:41 PM CDT | Special Weather Statement | BMX | Barbour | 49 min |
| Mar 16, 4:46 PM CDT | Areal Flood Advisory | BMX | Barbour, Bullock, Pike | 3 hr |
| Mar 16, 5:33 PM CDT | Special Weather Statement | BMX | Greene | 27 min |
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.