Alert archive / Alabama / Special Weather Statements in 2018
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Jul 21, 2018, 11:33 PM CDT for Macon County, Alabama. It was in force for 42 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2018, 11:33 PM CDT (04:33 UTC)
- Expired
- Jul 22, 2018, 12:15 AM CDT
- In force
- 42 min
- Issued by
- NWS Birmingham, AL
County Macon County, AL
The radar
The Maxwell AFB radar (KMXX), 5 km from the middle of the area, began a volume at 04:35 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, 4.6 hours before the alert went out and 121 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
- 2210 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1459 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 8.3
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 21, 6:53 PM CDT, 4 hours 40 minutes earlier.
Area forecast discussion, Jul 21, 6:53 PM CDT, 4 hours 40 minutes before
Area Forecast Discussion National Weather Service Birmingham AL 653 PM CDT Sat Jul 21 2018 .UPDATE... For 00Z Aviation. && Near Term... Through Early Evening. A couple storms have developed over the last hour across east Alabama, and seeing a more developed cu field across portions of the northeast. Expect this to be the primary area of development. The mesoscale discussion issued earlier today remains valid (below). Although storm coverage will be low, any storm that develops could be strong to severe through early evening. 14 .LONG TERM... Sunday through Friday. The cold front will slowly slide southward through the area on Sunday and should be near the I-85 corridor by sunset. Look for the front to actually clear the area by Sunday night, but then we shift our attention to the north and the path of the upper low. Models have come into a little bit more of a consensus on the path of the upper low swinging through northern GA and into Central AL on Monday and then setting up shop for several days. This scenario would place the highest rain chances in the eastern half each afternoon through Wednesday. By Thursday the upper low opens up and begins to elongate across the Southeast, before the energy slides east ahead of the next front that will likely hold of until the beginning of next week. Highest rain chances for Friday and Saturday will be across the north, while the southern areas could dry out some. Temperatures will be in the upper 80s with the cloud cover through midweek and then rise back into the low 90s by the weekend. && .AVIATION... 00Z TAF Discussion. Outside thunderstorms, VFR conds expected thru the period. Isolated TSRA across east Alabama thru 03z could impact KMGM and KTOI between 02z and 06z, and handled with VCTS. West to southwest winds 8-12 knots thru 02z will diminish to 3-6 knots overnight. Sfc winds will increase and become west northwest after 15z as the surface trof pushes south of the area. Isolated TSRA will develop after 17z across northeast Alabama, possibly impacting KANB and KASN. 58/rose && .FIRE WEATHER... Isolated to scattered showers/storms are possible through tonight as a front moves slowly through the area. Tomorrow through early next week, an upper low will move over the region, leading to higher rain chances, especially across the east. This will also bring slightly cooler temperatures. Localized fog will be possible each morning over the next couple of days where rainfall occurs during the previous afternoon and evening. There are no fire weather concerns. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 71 88 68 85 68 / 20 50 30 60 20 Anniston 71 88 68 85 68 / 20 30 30 60 30 Birmingham 75 90 71 87 70 / 10 20 20 50 10 Tuscaloosa 74 92 72 89 71 / 10 10 10 30 10 Calera 73 90 70 87 69 / 20 20 10 40 10 Auburn 74 89 70 86 70 / 50 30 30 60 30 Montgomery 74 93 72 90 70 / 30 30 10 50 20 Troy 75 92 72 89 70 / 30 30 20 50 20 && .BMX WATCHES/WARNINGS/ADVISORIES/... None. &&
Hazardous weather outlook, Jul 21, 11:27 PM CDT, 6 minutes before
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Special weather statement, Jul 21, 10:02 PM CDT, 1 hour 31 minutes before
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</html>The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 8:56 PM CDT | Special Weather Statement | BMX | Talladega | 34 min |
| Jul 21, 9:08 PM CDT | Severe Thunderstorm Warning | BMX | Clay, Talladega | 37 min |
| Jul 21, 9:18 PM CDT | Severe Thunderstorm Warning | BMX | Coosa, Tallapoosa | 27 min |
| Jul 21, 9:34 PM CDT | Special Weather Statement | BMX | Clay | 26 min |
| Jul 21, 9:42 PM CDT | Severe Thunderstorm Warning | BMX | Coosa, Tallapoosa | 33 min |
| Jul 21, 9:51 PM CDT | Special Weather Statement | BMX | Shelby | 24 min |
| Jul 21, 9:57 PM CDT | Special Weather Statement | BMX | Randolph | 33 min |
| Jul 21, 10:02 PM CDT | Special Weather Statement | BMX | Shelby | 28 min |
| Jul 21, 10:09 PM CDT | Special Weather Statement | BMX | Tallapoosa | 36 min |
| Jul 21, 10:20 PM CDT | Special Weather Statement | BMX | Coosa | 25 min |
| Jul 21, 10:57 PM CDT | Special Weather Statement | BMX | Tallapoosa | 48 min |
| Jul 21, 10:58 PM CDT | Special Weather Statement | BMX | Tallapoosa | 47 min |
| Jul 21, 11:57 PM CDT | Special Weather Statement | BMX | Russell | 48 min |
| Jul 22, 11:22 AM CDT | Severe Thunderstorm Warning | BMX | Marengo | 23 min |
| Jul 22, 11:29 AM CDT | Special Weather Statement | BMX | Marengo | 16 min |
| Jul 22, 11:38 AM CDT | Severe Thunderstorm Warning | BMX | Marengo | 22 min |
| Jul 22, 12:28 PM CDT | Special Weather Statement | BMX | Lowndes | 47 min |
| Jul 22, 12:45 PM CDT | Severe Thunderstorm Warning | BMX | Lowndes | 30 min |
| Jul 22, 1:05 PM CDT | Severe Thunderstorm Warning | BMX | Lowndes, Montgomery | 40 min |
| Jul 22, 2:07 PM CDT | Special Weather Statement | BMX | Russell | 53 min |
Nearby
Special Weather Statements in Alabama, 2018Every special weather statement in 2018
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.