Alert archive / Alabama / Heat Advisories in 2017

Heat Advisory 4, NWS Birmingham, AL

July 26, 201735 counties in Alabama

NWS Birmingham, AL issued this heat advisory at Jul 26, 2017, 12:29 PM CDT for 35 counties in Alabama. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jul 26, 2017, 12:29 PM CDT (17:29 UTC)
Expired: Jul 26, 2017, 9:00 PM CDT
In force: 9 hr
Issued by: NWS Birmingham, AL

All 35 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 26 km from the middle of the area, began a volume at 17:29 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, 5.5 hours before the alert went out and 27 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: 1729 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 961 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 23 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 heat 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 heat advisory went out at Jul 26, 6:08 AM CDT, 6 hours 21 minutes earlier.

Area forecast discussion, Jul 26, 6:08 AM CDT, 6 hours 21 minutes before

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Hazardous weather outlook, Jul 26, 11:45 AM CDT, 44 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 7:00 PM CDT	Special Weather Statement	BMX	Talladega	30 min
Jul 25, 7:26 PM CDT	Special Weather Statement	BMX	Cleburne	34 min
Jul 25, 7:30 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	30 min
Jul 25, 8:01 PM CDT	Special Weather Statement	BMX	Cleburne	29 min
Jul 25, 8:29 PM CDT	Areal Flood Advisory	BMX	Cleburne	3 hr
Jul 26, 12:43 PM CDT	Special Weather Statement	BMX	Shelby	32 min
Jul 26, 12:51 PM CDT	Special Weather Statement	BMX	Blount	24 min
Jul 26, 12:55 PM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	3 hr
Jul 26, 12:58 PM CDT	Special Weather Statement	BMX	Jefferson	32 min
Jul 26, 1:13 PM CDT	Flash Flood Warning	BMX	Jefferson, Shelby	3 hr
Jul 26, 1:32 PM CDT	Special Weather Statement	BMX	Bibb	28 min
Jul 26, 1:35 PM CDT	Areal Flood Advisory	BMX	Jefferson	3 hr
Jul 26, 1:43 PM CDT	Special Weather Statement	BMX	St. Clair	32 min
Jul 26, 1:46 PM CDT	Special Weather Statement	BMX	DeKalb	29 min
Jul 26, 1:48 PM CDT	Special Weather Statement	BMX	Chilton	42 min
Jul 26, 1:49 PM CDT	Special Weather Statement	BMX	Etowah	26 min
Jul 26, 1:53 PM CDT	Special Weather Statement	BMX	Jefferson	37 min
Jul 26, 1:54 PM CDT	Areal Flood Advisory	BMX	St. Clair	3 hr
Jul 26, 2:09 PM CDT	Special Weather Statement	BMX	Chilton	51 min
Jul 26, 2:29 PM CDT	Special Weather Statement	BMX	Autauga	46 min
Jul 26, 2:30 PM CDT	Areal Flood Advisory	BMX	Bibb	3 hr
Jul 26, 2:37 PM CDT	Areal Flood Advisory	BMX	Autauga	3 hr
Jul 26, 2:39 PM CDT	Special Weather Statement	BMX	Macon	36 min
Jul 26, 3:01 PM CDT	Special Weather Statement	BMX	Russell	29 min
Jul 26, 3:02 PM CDT	Areal Flood Advisory	BMX	Dallas	3 hr
Jul 26, 3:14 PM CDT	Special Weather Statement	BMX	Dallas, Perry	46 min
Jul 26, 3:27 PM CDT	Special Weather Statement	BMX	Bullock	48 min
Jul 26, 3:28 PM CDT	Special Weather Statement	BMX	Lowndes	47 min
Jul 26, 3:51 PM CDT	Special Weather Statement	BMX	Dallas	39 min
Jul 26, 3:56 PM CDT	Special Weather Statement	BMX	Barbour	49 min
Jul 26, 4:12 PM CDT	Special Weather Statement	BMX	Pike	33 min
Jul 26, 4:35 PM CDT	Special Weather Statement	BMX	Montgomery	25 min
Jul 26, 5:02 PM CDT	Special Weather Statement	BMX	Pike	28 min
Jul 26, 5:29 PM CDT	Special Weather Statement	BMX	Pike	31 min

Nearby

Heat Advisories in Alabama, 2017 Every heat advisory 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.