Alert archive / Alabama / Special Weather Statements in 2017
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Dec 20, 2017, 12:09 PM CST for Lee County, Alabama. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Dec 20, 2017, 12:09 PM CST (18:09 UTC)
- Expired
- Dec 20, 2017, 12:45 PM CST
- In force
- 36 min
- Issued by
- NWS Birmingham, AL
County Lee County, AL
The radar
The Maxwell AFB radar (KMXX), 62 km from the middle of the area, began a volume at 18:09 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, 6.2 hours before the alert went out and 102 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
- 11 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 572 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 242 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Dec 20, 11:58 AM CST, 11 minutes earlier.
Area forecast discussion, Dec 20, 11:58 AM CST, 11 minutes before
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</html>Hazardous weather outlook, Dec 20, 9:56 AM CST, 2 hours 13 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 956 AM CST Wed Dec 20 2017 ALZ011>015-017>050-211900- 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- 956 AM CST Wed Dec 20 2017 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Today and Tonight. The potential exist for a few severe storms through 3 PM across the southeast half of Central Alabama. The threats including a brief tornado and damaging wind. Locally heavy rainfall is possible as well in this area. A few locations may receive 1 to 2 inches of rain. This will cause some isolated runoff issues and minor flooding in poor drainage areas. Dense fog may develop once again over much of Central Alabama, restricting visibilities to less than one mile at times after midnight. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Dense fog may persist across portions of the area through 9 AM Thursday morning. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management may be needed through this afternoon. 08
In the hours before
Local storm report, Dec 20, 11:15 AM CST, 54 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 |
|---|---|---|---|---|
| Dec 19, 6:37 PM CST | Dense Fog Advisory | BMX | Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more | 11 hr |
| Dec 20, 7:21 AM CST | Areal Flood Advisory | BMX | Jefferson | 3 hr |
| Dec 20, 7:54 AM CST | Flash Flood Warning | BMX | Jefferson | 3 hr |
| Dec 20, 8:00 AM CST | Flash Flood Warning | BMX | Etowah | 3 hr |
| Dec 20, 8:36 AM CST | Areal Flood Advisory | BMX | Calhoun, Clay, Cleburne, Randolph, St. Clair, Shelby and 1 more | 3 hr |
| Dec 20, 10:38 AM CST | Tornado Warning | BMX | Randolph | 14 min |
Nearby
Special Weather Statements in Alabama, 2017Every special weather statement in 2017
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.