Alert archive / Alabama / Heat Advisories in 2017
Heat Advisory 1, NWS Birmingham, AL
NWS Birmingham, AL issued this heat advisory at Jul 21, 2017, 11:45 AM CDT for 26 counties in Alabama. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 21, 2017, 11:45 AM CDT (16:45 UTC)
- Expired
- Jul 21, 2017, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Birmingham, AL
All 26 counties
Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Chilton 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), 40 km from the middle of the area, began a volume at 16:46 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, 4.8 hours before the alert went out and 40 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
- 1369 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1108 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 21, 7:24 AM CDT, 4 hours 21 minutes earlier.
Area forecast discussion, Jul 21, 7:24 AM CDT, 4 hours 21 minutes before
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</html>Hazardous weather outlook, Jul 21, 3:32 AM CDT, 8 hours 13 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 332 AM CDT Fri Jul 21 2017 ALZ011>015-017>050-221145- 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- 332 AM CDT Fri Jul 21 2017 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Outlook through Tonight. High temperatures are forecast to be in the middle 90s this afternoon. Heat indices could reach 105 or slightly higher across isolated areas of western and southern Alabama during the afternoon. Confidence remains low at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management is not expected at this time.
The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:23 PM CDT | Special Weather Statement | BMX | Greene, Hale | 37 min |
| Jul 21, 4:43 PM CDT | Special Weather Statement | BMX | Sumter | 32 min |
| Jul 21, 5:05 PM CDT | Special Weather Statement | BMX | Macon | 25 min |
| Jul 21, 5:17 PM CDT | Special Weather Statement | BMX | Sumter | 28 min |
| Jul 21, 5:18 PM CDT | Special Weather Statement | BMX | Lowndes | 27 min |
| Jul 21, 5:41 PM CDT | Severe Thunderstorm Warning | BMX | Lowndes | 24 min |
| Jul 21, 5:48 PM CDT | Special Weather Statement | BMX | Montgomery | 27 min |
| Jul 21, 6:07 PM CDT | Special Weather Statement | BMX | Lowndes | 38 min |
| Jul 21, 6:34 PM CDT | Special Weather Statement | BMX | Autauga | 41 min |
| Jul 21, 6:44 PM CDT | Special Weather Statement | BMX | Macon | 31 min |
Nearby
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.