Alert archive / Alabama / Special Weather Statements in 2017
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Jul 15, 2017, 1:09 PM CDT for Cherokee County, Alabama. It was in force for 36 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 15, 2017, 1:09 PM CDT (18:09 UTC)
- Expired
- Jul 15, 2017, 1:45 PM CDT
- In force
- 36 min
- Issued by
- NWS Birmingham, AL
County Cherokee County, AL
The radar
The Northeast Alabama radar (KHTX), 94 km from the middle of the area, began a volume at 18:08 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 12:00Z, 6.2 hours before the alert went out and 138 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
- 166 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1305 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 15, 12:34 PM CDT, 35 minutes earlier.
Area forecast discussion, Jul 15, 12:34 PM CDT, 35 minutes before
Area Forecast Discussion National Weather Service Birmingham AL 1234 PM CDT Sat Jul 15 2017 .UPDATE... For 18Z Aviation. && .SHORT TERM... Today and Tonight. This AM at the surface we have a low over New England with a cold front extending southward toward Long Island and southwest across VA/TN and back into OK. The surface low is expected to move off into the Atlantic today and drag the front to the east with it. As it does so, we will see the front sag southward into North Alabama slowly today. However, the upper flow today is weak across the southern states and the front is expected to progress slowly or stall out today into tonight across the northern part of the cwa. With some enhancement of lift from the approaching front, we should see our highest rain chances across the northern counties this afternoon. This elevated rain chance/cloud cover should help to keep temperatures a few degrees milder overall, especially in the north. Have removed heat indices mention from HWO as a result with all values in the forecast grids below 100. 08 .LONG TERM... Sunday through Saturday. An upper level trough extends through the Great Lakes and into the Central Appalachians on Saturday. This trough digs southward over the weekend and stretches a weak cold front from the trough axis. There's not too much in the way of forcing to push the front through, so it slowly drifts through Central AL Sunday night before stalling in Southern AL early Monday morning. Models have been trending lower on the coverage of storms along the frontal boundary as it moves through the area. Still have roughly 50% coverage on Sunday with 60% coverage in the southern most counties. Behind the front, northerly flow sets in across Central AL, leading to drier weather and fewer afternoon storms. Models still have the trough cutting off a low late Wednesday. Expect this to be more of a broad energy that retrogrades westward through the end of the week rather than an organize cut-off low. Low level ridging and continued northerly flow should keep our rain chances more around the 20-25% range with near-normal high temperatures each afternoon. 25/Owen && .AVIATION... 18Z TAF Discussion. A surface boundary along the Alabama and Tennessee state line will sink slowly southward today and become stationary near the I-20 corridor tonight. Sct to numerous tstms will develop across north central Alabama this afternoon and impact many if not all TAF sites. The storms will contain heavy rainfall with vsbys below 3 miles. The storms will be most active between 20z and 23z, decreasing after 01z, and mostly dissipated by 03z. Low cigs and fog will likely form overnight along the I-20 corridor due to a stalled out frontal boundary, with widespread cigs aob 500 feet agl and vsbys below 3 miles. The low cigs/fog should burn off by 14z. 58/rose && .FIRE WEATHER... Isolated to scattered summertime showers and thunderstorms are expected each afternoon for the rest of this week and into the weekend. There are no fire weather concerns at this time. && .PRELIMINARY POINT TEMPS/POPS... Gadsden 71 88 70 89 71 / 30 40 30 30 20 Anniston 72 87 70 89 71 / 30 50 30 30 20 Birmingham 73 88 72 89 73 / 30 50 30 30 20 Tuscaloosa 74 89 73 91 74 / 30 50 30 30 20 Calera 73 87 72 89 73 / 40 50 30 40 20 Auburn 74 86 71 87 72 / 30 50 30 40 20 Montgomery 75 89 73 90 73 / 30 60 30 40 20 Troy 73 88 72 87 72 / 30 60 30 50 20 && .BMX WATCHES/WARNINGS/ADVISORIES/... None. &&
Hazardous weather outlook, Jul 15, 9:19 AM CDT, 3 hours 50 minutes before
Hazardous Weather Outlook National Weather Service Birmingham AL 919 AM CDT Sat Jul 15 2017 ALZ011>015-017>050-161730- 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- 919 AM CDT Sat Jul 15 2017 This Hazardous Weather Outlook is for the counties served by the National Weather Service office in Birmingham. .DAY ONE...Outlook through Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Activation of storm spotters and emergency management is not expected at this time.
In the hours before
Special weather statement, Jul 15, 12:35 PM CDT, 34 minutes before
Special Weather Statement
National Weather Service Birmingham AL
1235 PM CDT SAT JUL 15 2017
ALZ020-151800-
Cherokee AL-
1235 PM CDT SAT JUL 15 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CHEROKEE COUNTY UNTIL 100
PM CDT...
At 1234 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Summerville Georgia, moving southwest at 15 mph.
Pea size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Cedar Bluff, Little River Canyon National Preserve, Sand Rock,
Gaylesville, Cornwall Furnace Park, Weiss Lake, Blanche, Little River
Falls, Fullerton, New Moon, Yellow Creek Falls, Chesnut Bay Resort,
Broomtown, Howells Crossroads, Waterhouse, Chesterfield and Little
River Canyon National Preserve.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3449 8550 3412 8543 3424 8581 3426 8581
3426 8577 3436 8566 3437 8563 3439 8562
3440 8563 3440 8561 3444 8558 3449 8557
3449 8556 3450 8556 3450 8555 3453 8552
TIME...MOT...LOC 1734Z 039DEG 13KT 3449 8547
56Special weather statement, Jul 15, 1:09 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Birmingham AL
109 PM CDT SAT JUL 15 2017
ALZ020-151845-
Cherokee AL-
109 PM CDT SAT JUL 15 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CHEROKEE COUNTY UNTIL 145
PM CDT...
At 109 PM CDT, Doppler radar was tracking a strong thunderstorm over
Weiss Lake, or near Cedar Bluff, moving south at 10 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Centre, Cedar Bluff, Centre Municipal Airport, Forney, Leesburg, Sand
Rock, Gaylesville, Tennala, Cornwall Furnace Park, Weiss Lake,
Moshat, Weiss Dam, Fullerton, Yellow Creek Falls, Chesnut Bay Resort,
Howells Crossroads and Waterhouse.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3408 8542 3407 8578 3410 8580 3426 8578
3432 8571 3434 8547
TIME...MOT...LOC 1809Z 356DEG 8KT 3425 8566
56The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 12:35 PM CDT | Special Weather Statement | BMX | DeKalb | 25 min |
| Jul 15, 1:20 PM CDT | Severe Thunderstorm Warning | BMX | Cherokee | 17 min |
| Jul 15, 4:39 PM CDT | Areal Flood Advisory | BMX | Blount | 2 hr |
| Jul 15, 5:11 PM CDT | Special Weather Statement | BMX | Marion | 34 min |
| Jul 15, 5:18 PM CDT | Special Weather Statement | BMX | Jefferson | 27 min |
| Jul 15, 5:20 PM CDT | Special Weather Statement | BMX | Shelby | 25 min |
| Jul 15, 5:29 PM CDT | Areal Flood Advisory | BMX | Jefferson, Shelby | 2 hr |
| Jul 15, 5:42 PM CDT | Flash Flood Warning | BMX | Jefferson, Shelby | 2 hr |
Nearby
Special Weather Statements in Alabama, 2017Every special weather statement 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.