Alert archive / Alabama / Areal Flood Warnings in 2020

Areal Flood Warning 13, NWS Birmingham, AL

February 10, 20207 counties in Alabama

NWS Birmingham, AL issued this areal flood warning at Feb 10, 2020, 8:25 PM CST for 7 counties in Alabama. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 10, 2020, 8:25 PM CST (02:25 UTC)
Expired: Feb 11, 2020, 2:30 AM CST
In force: 6 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Calhoun County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Randolph County, AL, St. Clair County, AL, Talladega County, AL

The radar

The Birmingham radar (KBMX), 85 km from the middle of the area, began a volume at 02:28 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

Birmingham, AL (KBMX), launched 00:00Z, 2.4 hours before the alert went out and 85 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 10 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 449 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: -145 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Feb 10, 6:11 PM CST, 2 hours 14 minutes earlier.

Area forecast discussion, Feb 10, 6:11 PM CST, 2 hours 14 minutes before

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Hazardous weather outlook, Feb 10, 6:14 PM CST, 2 hours 11 minutes before

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In the hours before

Local storm report, Feb 10, 3:02 PM CST, 5 hours 23 minutes before

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Local storm report, Feb 10, 3:22 PM CST, 5 hours 3 minutes before

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Local storm report, Feb 10, 3:30 PM CST, 4 hours 55 minutes before

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Local storm report, Feb 10, 3:57 PM CST, 4 hours 28 minutes before

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Local storm report, Feb 10, 6:03 PM CST, 2 hours 22 minutes before

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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Feb 10, 6:10 PM CST, 2 hours 15 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 10, 6:13 PM CST	Areal Flood Warning	BMX	Bibb, Greene, Jefferson, Pickens, Shelby, Sumter and 1 more	6 hr
Feb 10, 8:29 PM CST	Areal Flood Warning	BMX	Bibb, Chilton, Hale, Perry	6 hr
Feb 10, 11:13 PM CST	Areal Flood Advisory	BMX	Fayette, Lamar, Marion, Walker, Winston	6 hr
Feb 11, 12:03 AM CST	Areal Flood Advisory	BMX	Blount, Cherokee, Etowah	6 hr
Feb 11, 12:19 AM CST	Areal Flood Warning	BMX	Bibb, Greene, Jefferson, Pickens, Shelby, Sumter and 1 more	6 hr
Feb 11, 12:26 AM CST	Areal Flood Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	6 hr
Feb 11, 2:38 AM CST	Areal Flood Advisory	BMX	Calhoun, Chilton, Clay, Cleburne, Coosa, Randolph and 2 more	4 hr
Feb 11, 3:03 AM CST	River Flood Warning	BMX	Dallas	6 days
Feb 11, 6:13 AM CST	Flash Flood Warning	BMX	Tuscaloosa	3 hr
Feb 11, 7:37 AM CST	Areal Flood Advisory	BMX	Bibb, Shelby, Talladega	3 hr
Feb 11, 8:35 AM CST	River Flood Warning	BMX	Autauga, Dallas, Lowndes	4 days
Feb 11, 1:58 PM CST	Special Weather Statement	BMX	Elmore	47 min
Feb 11, 2:39 PM CST	River Flood Warning	BMX	Chambers, Elmore, Macon, Randolph, Tallapoosa	29 hr
Feb 11, 2:46 PM CST	Special Weather Statement	BMX	Lee	44 min
Feb 11, 3:43 PM CST	Flash Flood Watch	BMX	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 19 more	38 hr

Nearby

Areal Flood Warnings in Alabama, 2020 Every areal flood warning 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.