Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 154, NWS Birmingham, AL

July 6, 2017Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 6, 2017, 5:47 PM CDT for Tuscaloosa County, Alabama. It was in force for 43 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 6, 2017, 5:47 PM CDT (22:47 UTC)
Expired: Jul 6, 2017, 6:30 PM CDT
In force: 43 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 74 km from the middle of the area, began a volume at 22:50 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 10.8 hours before the alert went out and 73 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: 1227 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 853 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: -79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

847 
WUUS54 KBMX 062247
SVRBMX
ALC125-062330-
/O.NEW.KBMX.SV.W.0154.170706T2247Z-170706T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
547 PM CDT THU JUL 6 2017

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  North central Tuscaloosa County in west central Alabama...

* Until 630 PM CDT

* At 547 PM CDT, severe thunderstorms were located along a line
  extending from near Oakman to near Boley Springs to near Ashcraft
  Corner, moving east at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Windham Springs, Whitson, Wiley and New Lexington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3358 8767 3358 8763 3361 8763 3361 8762
      3360 8737 3359 8737 3359 8732 3352 8732
      3352 8727 3350 8726 3350 8729 3348 8729
      3349 8733 3347 8734 3346 8734 3352 8767
TIME...MOT...LOC 2247Z 281DEG 31KT 3371 8744 3360 8756 3355 8792 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

3 follow-up statements

566 
WWUS54 KBMX 062307
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
607 PM CDT THU JUL 6 2017

ALC125-062330-
/O.CON.KBMX.SV.W.0154.000000T0000Z-170706T2330Z/
Tuscaloosa AL-
607 PM CDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTH CENTRAL TUSCALOOSA COUNTY...

At 607 PM CDT, severe thunderstorms were located along a line
extending from Gorgas to 8 miles north of Bankhead Lock And Dam to 9
miles east of Ashcraft Corner, moving east at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Windham Springs, Whitson, Wiley and New Lexington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3358 8767 3358 8763 3361 8763 3361 8762
      3360 8737 3359 8737 3359 8732 3352 8732
      3352 8727 3350 8726 3350 8729 3348 8729
      3349 8733 3347 8734 3346 8734 3352 8767
TIME...MOT...LOC 2307Z 281DEG 31KT 3368 8725 3357 8737 3352 8773 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

665 
WWUS54 KBMX 062320
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
620 PM CDT THU JUL 6 2017

ALC125-062330-
/O.CON.KBMX.SV.W.0154.000000T0000Z-170706T2330Z/
Tuscaloosa AL-
620 PM CDT THU JUL 6 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTH CENTRAL TUSCALOOSA COUNTY...

At 620 PM CDT, severe thunderstorms were located along a line
extending from Gorgas Steam Plant to 9 miles northwest of Bull City
to 6 miles west of Bankhead Lock And Dam, moving east at 30 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Wiley, Windham Springs and Whitson. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3350 8755 3360 8740 3360 8737 3359 8737
      3359 8732 3352 8732 3352 8727 3350 8726
      3350 8729 3348 8729 3349 8733 3347 8734
      3346 8734
TIME...MOT...LOC 2320Z 283DEG 27KT 3366 8721 3355 8733 3348 8746 

HAIL...<.75IN
WIND...60MPH
 
$$

87/GRANTHAM

746 
WWUS54 KBMX 062327 RRA
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
627 PM CDT THU JUL 6 2017

ALC125-062337-
/O.EXP.KBMX.SV.W.0154.000000T0000Z-170706T2330Z/
Tuscaloosa AL-
627 PM CDT THU JUL 6 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL TUSCALOOSA
COUNTY WILL EXPIRE AT 630 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.

LAT...LON 3350 8755 3360 8740 3360 8737 3359 8737
      3359 8732 3352 8732 3352 8727 3350 8726
      3350 8729 3348 8729 3349 8733 3347 8734
      3346 8734
TIME...MOT...LOC 2327Z 281DEG 31KT 3365 8715 3354 8727 3347 8740 

$$

87/GRANTHAM

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 6, 3:51 PM CDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jul 6, 3:51 PM CDT, 1 hour 56 minutes before

Area Forecast Discussion
National Weather Service Birmingham AL
351 PM CDT Thu Jul 6 2017

.SHORT TERM...
Through Tonight.

Seeing another round of showers and storms this afternoon ahead of
the approaching upper level trough. Although coverage has been
less today than previous days, the potential for strong to severe
storms remains. This activity will diminish with sunset this
evening, but as the trough axis moves into the Tennessee Valley
overnight, isolated to scattered activity will be possible across
the north, especially after midnight.

14

.LONG TERM...
Friday through Thursday.

The main trough axis pushes through Central AL on Friday and the
weak frontal boundary stalls over the South-Central portions of the
state. Even though the the boundary is fairly weak, expect enough
lift during peak heating to drive afternoon thunderstorms. For now,
coverage could be more scattered, so have 40-50% PoPs in the
forecast each afternoon. As we have seen the past few days, any of
these scattered storms can develop a fairly intense core and
generate gusty winds 35-45 mph. While this is below severe limits,
similar winds have been causing downed trees due to the saturated
grounds. For now, have left our mention of any severe in the HWO for
Friday, but will need to re-evaluate any microburst potential once
we see how the convection pans out for today.

Another embedded wave moves southward through the larger-scale
trough over the Ohio River Valley on Saturday. This will push
another weak frontal boundary into Central AL, leading to enhanced
lift during the afternoon hours. Therefore, have included 40 PoPs
area-wide. By Sunday, the best chances of rain/storms will be
confined to the southern half of Central AL as the stalled boundary
remains in Southern AL.

The troughing over the Northeastern US begins to flatten and push
northward Tuesday into Wednesday, giving way to low-level ridging
over the Southeastern US. Expect typical diurnal temp and
precipitation trends Wednesday and Thursday with highs near 90 and
scattered afternoon thunderstorms.

25/Owen

&&

.AVIATION...
18Z TAF Discussion.

Scattered showers and storms will continue to develop this
afternoon, with the main focus across northern terminals, as near
and north of the I-20 corridor remains the best area for
development. Based on current radar trends and near term guidance,
have adjusted prevailing and tempo wording through early evening.

Regarding fog and low cloud potential overnight, went with a
persistence forecast given very little change in setup. Will leave
out any reductions in vis and cig for now.

14

&&

.FIRE WEATHER...

Isolated to scattered showers and storms will be possible across the
northern two thirds Central Alabama through tonight. Somewhat
better rain chances will move in Friday for the south as an upper
level disturbance slides through. There are no fire weather
concerns due to summertime humidity.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     71  87  71  88  69 /  40  40  20  40  30
Anniston    72  87  72  88  70 /  40  50  20  40  30
Birmingham  74  88  74  89  72 /  40  50  20  40  30
Tuscaloosa  74  88  73  90  72 /  40  50  20  40  30
Calera      74  87  73  89  72 /  30  50  20  40  30
Auburn      73  87  72  88  72 /  20  50  20  40  40
Montgomery  75  90  75  91  74 /  20  50  20  40  40
Troy        73  88  72  89  71 /  20  50  20  40  40

&&

.BMX WATCHES/WARNINGS/ADVISORIES/...
None.

&&

Hazardous weather outlook, Jul 6, 4:12 AM CDT, 13 hours 35 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
412 AM CDT Thu Jul 6 2017

ALZ011>015-017>050-071215-
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-
412 AM CDT Thu Jul 6 2017

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

.DAY ONE...Today and Tonight.

Isolated thunderstorms across the northern half of Central Alabama
may result in straight line wind damage with up to 60 mph this
afternoon. Areas that may see the activity will be along and north of
a Tuscaloosa, to Calera, to Wedowee Line.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
this afternoon.

In the hours before

Special weather statement, Jul 6, 4:37 PM CDT, 1 hour 10 minutes before

Special Weather Statement
National Weather Service Birmingham AL
437 PM CDT THU JUL 6 2017

ALZ012-013-062230-
Fayette AL-Lamar AL-
437 PM CDT THU JUL 6 2017

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN FAYETTE AND SOUTHERN
LAMAR COUNTIES UNTIL 530 PM CDT...

At 437 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Bluff to near Steens. Movement was east at
20 mph.

Pea size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Winfield, Fayette, Vernon, Millport, Glen Allen, Kennedy, Belk,
Ashcraft Corner, Blooming Grove, Bluff, Cody, Wayside, Richard Arthur
Field, Bevill State College Fayette, Hubbertville, Fowlers
Crossroads, Star, Hightogy and Melborne.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3368 8826 3388 8803 3388 8764 3387 8763
      3387 8759 3352 8785 3352 8799 3353 8828
TIME...MOT...LOC 2137Z 273DEG 17KT 3389 8794 3352 8827

87/GRANTHAM

Local storm report, Jul 6, 4:59 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
459 PM CDT THU JUL 6 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0354 PM     TSTM WND DMG     1 SE GLENCOE            33.95N 85.92W
07/06/2017                   ETOWAH             AL   EMERGENCY MNGR

            TREES DOWN ON DAVIS STREET IN GLENCOE.

&&

GGOGGINS

Local storm report, Jul 6, 5:01 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
501 PM CDT THU JUL 6 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0354 PM     LIGHTNING        2 NE GLENCOE            33.98N 85.91W
07/06/2017                   ETOWAH             AL   EMERGENCY MNGR

            RABBITTOWN RD GLENCOE, LIGHTING STRUCK A
            HOME. SHINGLES KNOCKED OFF, HOLE IN THE
            ROOF. NO INJURIES REPORTED.

&&

GGOGGINS

Local storm report, Jul 6, 5:04 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
504 PM CDT THU JUL 6 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0424 PM     TSTM WND DMG     PIEDMONT                33.93N 85.62W
07/06/2017                   CALHOUN            AL   EMERGENCY MNGR

            TREES AND POWER LINES DOWN IN PIEDMONT. TIME
            BASED ON RADAR.

&&

GGOGGINS

Local storm report, Jul 6, 5:06 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
506 PM CDT THU JUL 6 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     TSTM WND DMG     OHATCHEE                33.78N 86.02W
07/06/2017                   CALHOUN            AL   PUBLIC

            TREES DOWN IN OHATCHEE, INCLUDING ONE TREE
            ON A STRUCTURE ON THOMPSON RD. TIME BASED ON
            RADAR.

&&

GGOGGINS

Local storm report, Jul 6, 5:21 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
521 PM CDT THU JUL 6 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0440 PM     TSTM WND DMG     PELL CITY               33.59N 86.28W
07/06/2017                   ST. CLAIR          AL   PUBLIC

            MULTIPLE TREES DOWN IN PELL CITY, INCLUDING
            ROOF DAMAGE REPORTED ON ALLEN ROAD, WHERE
            HALF OF THE ROOF WAS BLOWN OFF OF AN UNKNOWN
            BUILDING. TIME ESTIMATED BY RADAR.

&&

GGOGGINS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 12:15 PM CDT	Special Weather Statement	BMX	DeKalb	30 min
Jul 6, 2:18 PM CDT	Special Weather Statement	BMX	Jefferson	27 min
Jul 6, 2:48 PM CDT	Special Weather Statement	BMX	St. Clair	42 min
Jul 6, 2:49 PM CDT	Special Weather Statement	BMX	Tuscaloosa	41 min
Jul 6, 3:21 PM CDT	Special Weather Statement	BMX	Cherokee	39 min
Jul 6, 3:23 PM CDT	Special Weather Statement	BMX	Shelby	52 min
Jul 6, 3:28 PM CDT	Special Weather Statement	BMX	Calhoun	47 min
Jul 6, 3:43 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Etowah	47 min
Jul 6, 4:09 PM CDT	Special Weather Statement	BMX	Shelby	36 min
Jul 6, 4:21 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Cleburne	36 min
Jul 6, 4:29 PM CDT	Special Weather Statement	BMX	Talladega	61 min
Jul 6, 4:32 PM CDT	Special Weather Statement	BMX	Walker	43 min
Jul 6, 4:37 PM CDT	Special Weather Statement	BMX	Fayette, Lamar	53 min
Jul 6, 4:47 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Talladega	58 min
Jul 6, 5:11 PM CDT	Areal Flood Advisory	BMX	Fayette, Lamar, Walker	3 hr
Jul 6, 5:11 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	49 min
Jul 6, 5:23 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne	38 min
Jul 6, 5:50 PM CDT	Special Weather Statement	BMX	Cleburne	40 min
Jul 6, 6:00 PM CDT	Severe Thunderstorm Warning	BMX	Fayette, Walker	27 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2017 Every severe thunderstorm warning 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.