Alert archive / Alabama / Heat Advisories in 2016

Heat Advisory 9, NWS Birmingham, AL

August 4, 201627 counties in Alabama

NWS Birmingham, AL issued this heat advisory at Aug 4, 2016, 2:50 AM CDT for 27 counties in Alabama. It took effect at Aug 4, 2016, 11:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Aug 4, 2016, 2:50 AM CDT (07:50 UTC)
In effect from: Aug 4, 2016, 11:00 AM CDT
Expired: Aug 4, 2016, 9:00 PM CDT
In force: 10 hr
Issued by: NWS Birmingham, AL

All 27 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Chilton 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, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Russell County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 38 km from the middle of the area, began a volume at 07:54 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 00:00Z, 7.8 hours before the alert went out and 234 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: 5 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 1944 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: -7 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 Aug 3, 11:47 PM CDT, 3 hours 3 minutes earlier.

Area forecast discussion, Aug 3, 11:47 PM CDT, 3 hours 3 minutes before

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Hazardous weather outlook, Aug 3, 10:06 PM CDT, 4 hours 44 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 1:34 PM CDT	Special Weather Statement	BMX	Coosa	41 min
Aug 4, 2:13 PM CDT	Special Weather Statement	BMX	Chilton	47 min
Aug 4, 6:06 PM CDT	Special Weather Statement	BMX	Cleburne	24 min
Aug 4, 6:07 PM CDT	Special Weather Statement	BMX	Barbour, Pike	38 min

Nearby

Heat Advisories in Alabama, 2016 Every heat advisory in 2016

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.