Alert archive / Alabama / Wind Chill Advisories in 2009

Wind Chill Advisory 1, NWS Birmingham, AL

January 15, 200923 counties in Alabama

NWS Birmingham, AL issued this wind chill advisory at Jan 15, 2009, 6:00 AM CST for 23 counties in Alabama. It took effect at Jan 16, 2009, 3:00 AM CST. It was in force for 86 min.

The area

The counties it named.

The facts

Issued: Jan 15, 2009, 6:00 AM CST (12:00 UTC)
In effect from: Jan 16, 2009, 3:00 AM CST
Expired: Jan 16, 2009, 4:26 AM CST
In force: 86 min
Issued by: NWS Birmingham, AL

All 23 counties

Bibb County, AL, Blount County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Etowah County, AL, Fayette County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Marion County, AL, Pickens County, AL, Randolph County, AL, Shelby County, AL, St. Clair County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 42 km from the middle of the area, began a volume at 11:58 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, 0.0 hours before the alert went out and 42 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1362 m above ground
0-6 km bulk shear: 0 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 0 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 wind chill 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 wind chill advisory went out at Jan 14, 5:30 PM CST, 12 hours 30 minutes earlier.

Area forecast discussion, Jan 14, 5:30 PM CST, 12 hours 30 minutes before

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Hazardous weather outlook, Jan 14, 12:19 PM CST, 17 hours 41 minutes before

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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <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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        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
Jan 15, 6:37 AM CST	Hard Freeze Watch	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	22 hr
Jan 15, 6:37 AM CST	Hard Freeze Warning	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	25 hr
Jan 15, 6:37 AM CST	Lake Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	9 hr
Jan 15, 8:45 AM CST	Fire Weather Watch	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	20 hr

Nearby

Wind Chill Advisories in Alabama, 2009 Every wind chill advisory in 2009

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.