Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Birmingham, AL

July 7, 2017Tallapoosa County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 7, 2017, 3:15 PM CDT for Tallapoosa County, Alabama. It was in force for 30 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 7, 2017, 3:15 PM CDT (20:15 UTC)
Expired: Jul 7, 2017, 3:45 PM CDT
In force: 30 min
Issued by: NWS Birmingham, AL

County Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 13 km from the middle of the area, began a volume at 20:18 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, 8.3 hours before the alert went out and 112 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: 1733 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 848 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

As transmitted.

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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 7, 12:52 PM CDT, 2 hours 23 minutes earlier.

Area forecast discussion, Jul 7, 12:52 PM CDT, 2 hours 23 minutes before

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Hazardous weather outlook, Jul 7, 3:14 AM CDT, 12 hours 1 minute before

Hazardous Weather Outlook
National Weather Service Birmingham AL
314 AM CDT Fri Jul 7 2017

ALZ011>015-017>050-081115-
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-
314 AM CDT Fri Jul 7 2017

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

Isolated to scattered strong thunderstorms will be possible across
all of Central Alabama through 10 PM. The strongest activity may
result in straight line wind damage with up to 60 mph this afternoon
and early evening.

.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 may be needed
this afternoon and early evening.

In the hours before

Local storm report, Jul 7, 1:17 PM CDT, 1 hour 58 minutes before

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Special weather statement, Jul 7, 2:40 PM CDT, 35 minutes before

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Special weather statement, Jul 7, 2:43 PM CDT, 32 minutes before

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Special weather statement, Jul 7, 2:49 PM CDT, 26 minutes before

Special Weather Statement
National Weather Service Birmingham AL
249 PM CDT FRI JUL 7 2017

ALZ017-018-072030-
Etowah AL-Blount AL-
249 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BLOUNT AND
NORTHWESTERN ETOWAH COUNTIES UNTIL 330 PM CDT...

At 249 PM CDT, Doppler radar was tracking a strong thunderstorm over
Snead, or 11 miles east of Blountsville, moving east at 15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Altoona, Snead, Susan Moore, Walnut Grove, Aurora, Howelton and
Mountainboro.

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 3417 8637 3410 8630 3416 8623 3415 8614
      3399 8618 3410 8650 3418 8646
TIME...MOT...LOC 1949Z 281DEG 11KT 3412 8637

87/GRANTHAM

Special weather statement, Jul 7, 3:15 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Birmingham AL
315 PM CDT FRI JUL 7 2017

ALZ037-072045-
Tallapoosa AL-
315 PM CDT FRI JUL 7 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TALLAPOOSA COUNTY
UNTIL 345 PM CDT...

At 315 PM CDT, Doppler radar was tracking a strong thunderstorm near
Martin Dam, or 8 miles north of Tallassee, moving east at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Tallassee, Liberty City, Martin Dam, Tallapoosa City, Reeltown and
Yates Dam.

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 3271 8568 3270 8568 3270 8570 3260 8570
      3260 8571 3258 8572 3258 8580 3253 8580
      3256 8589 3265 8589 3266 8591 3269 8591
      3274 8588 3272 8561 3271 8561
TIME...MOT...LOC 2015Z 280DEG 19KT 3265 8584

87/GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 8:32 PM CDT	Areal Flood Advisory	BMX	Fayette, Walker	3 hr
Jul 7, 2:40 PM CDT	Special Weather Statement	BMX	Elmore	35 min
Jul 7, 2:43 PM CDT	Special Weather Statement	BMX	Pike	47 min
Jul 7, 2:49 PM CDT	Special Weather Statement	BMX	Marshall	41 min
Jul 7, 3:37 PM CDT	Special Weather Statement	BMX	Chambers	38 min
Jul 7, 3:38 PM CDT	Special Weather Statement	BMX	Dallas	37 min
Jul 7, 3:41 PM CDT	Special Weather Statement	BMX	Elmore	34 min
Jul 7, 4:13 PM CDT	Special Weather Statement	BMX	Lee	32 min
Jul 7, 4:17 PM CDT	Special Weather Statement	BMX	Dallas	43 min
Jul 7, 4:25 PM CDT	Special Weather Statement	BMX	Elmore	50 min
Jul 7, 4:27 PM CDT	Special Weather Statement	BMX	Macon	48 min
Jul 7, 4:39 PM CDT	Special Weather Statement	BMX	Sumter	36 min
Jul 7, 4:56 PM CDT	Areal Flood Advisory	BMX	Autauga, Elmore, Lowndes, Macon, Montgomery	3 hr
Jul 7, 5:04 PM CDT	Special Weather Statement	BMX	Cleburne	26 min
Jul 7, 5:05 PM CDT	Special Weather Statement	BMX	Cleburne	40 min
Jul 7, 5:06 PM CDT	Special Weather Statement	BMX	Lowndes	39 min
Jul 7, 5:19 PM CDT	Special Weather Statement	BMX	Hale	41 min
Jul 7, 5:20 PM CDT	Special Weather Statement	BMX	Russell	40 min
Jul 7, 5:32 PM CDT	Special Weather Statement	BMX	Clay	43 min
Jul 7, 5:38 PM CDT	Special Weather Statement	BMX	Russell	52 min
Jul 7, 5:52 PM CDT	Special Weather Statement	BMX	Montgomery	38 min

Nearby

Special Weather Statements in Alabama, 2017 Every 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.