Alert archive / Alabama / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 91, NWS Birmingham, AL

April 5, 2017Montgomery County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 5, 2017, 10:16 AM CDT for Montgomery County, Alabama. It was in force for 29 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 5, 2017, 10:16 AM CDT (15:16 UTC)
Expired: Apr 5, 2017, 10:45 AM CDT
In force: 29 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Montgomery County, AL

What was reported inside it

Time	Report	Where	Remark
Apr 5, 10:25 AM CDT	HAIL 1	2 Ssw Hope Hull, AL
Apr 5, 10:31 AM CDT	HAIL 0.25	1 Ese Eastdale Mall, AL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 9 minutes after it went out.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 5, 6:54 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 3.3 hours before the alert went out and 118 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: 560 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 617 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 408 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

408 
WUUS54 KBMX 051516
SVRBMX
ALC101-051545-
/O.NEW.KBMX.SV.W.0091.170405T1516Z-170405T1545Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
1016 AM CDT WED APR 5 2017

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Central Montgomery County in south central Alabama...

* Until 1045 AM CDT

* At 1016 AM CDT, a severe thunderstorm was located over Snowdoun, or
  7 miles south of Montgomery, moving east at 50 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Montgomery, Pike Road, Hyundai Motors Of Alabama, Alabama State
  University, Auburn University In Montgomery, Hope Hull, Woodcrest,
  Dannelly Field, Mount Meigs, Snowdoun, Pinedale, Waugh, Pintlala,
  Mitylene, Carters Hill, Barachias, Brassell and Cecil.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until noon CDT for south central
and southeastern Alabama.

LAT...LON 3218 8641 3222 8641 3235 8643 3241 8601
      3238 8601 3236 8599 3234 8599 3233 8597
      3230 8595 3228 8592 3227 8599 3225 8599
      3225 8600 3219 8600 3216 8640
TIME...MOT...LOC 1516Z 257DEG 42KT 3225 8630 

HAIL...1.00IN
WIND...60MPH
 
$$

17/KLAWS

1 follow-up statement

316 
WWUS54 KBMX 051534
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1034 AM CDT WED APR 5 2017

ALC101-051545-
/O.CON.KBMX.SV.W.0091.000000T0000Z-170405T1545Z/
Montgomery AL-
1034 AM CDT WED APR 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR NORTHEASTERN MONTGOMERY COUNTY...

At 1034 AM CDT, a severe thunderstorm was located over Pike Road, or
13 miles southwest of Milstead, moving east at 50 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Trained weather spotters. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Montgomery, Pike Road, Eastdale Mall, Mount Meigs, Auburn University
In Montgomery, Pinedale, Waugh, Brassell, Mitylene, Carters Hill,
Cecil and Barachias.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until noon CDT for south central
and southeastern Alabama.

LAT...LON 3225 8627 3231 8627 3238 8625 3241 8601
      3238 8601 3236 8599 3234 8599 3233 8597
      3230 8595 3228 8592 3227 8599 3225 8599
      3225 8600 3219 8600 3217 8620
TIME...MOT...LOC 1534Z 257DEG 42KT 3230 8606 

HAIL...1.00IN
WIND...60MPH
 
$$

17/KLAWS

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 Apr 5, 9:04 AM CDT, 1 hour 12 minutes earlier.

Area forecast discussion, Apr 5, 9:04 AM CDT, 1 hour 12 minutes before

Area Forecast Discussion
National Weather Service Birmingham AL
904 AM CDT Wed Apr 5 2017

.UPDATE...
MESOSCALE UPDATE.

&&

.DISCUSSION...

Effective warm front roughly positioned from northern Sumter
County northeast across southern Bibb County east across southern
Talladega County and into southern Cleburne County.

The airmass is continuing to rapidly destabilize south of the warm
front with temperatures in the low to mid 70's along the U.S.
Highway 80 corridor along with dew points in the lower 70's
across our southern tier of counties.

We continue to monitor the potential for large hail with
thunderstorms near and north of the warm front and for the
increasing potential of all convective hazards to the southwest
across southern Alabama.

Our concern continues to increase with discrete storms moving out
of Clarke and Monroe Counties and into Wilcox County while
additional discrete storms are moving out of Escambia and Conecuh
Counties and into Covington County. These storms will pose a
threat to Selma/Montgomery/Troy areas through the next few hours.

Visible satellite imagery indicates some breaks in the clouds from
Washington County north to Tuscaloosa County. Solar radiation will
help to further raise temperatures and will result in further
airmass destabilization through the remainder of the morning
hours across our western and southwest counties.

The latest derived hodograph from the KBMX radar velocity wind
profile indicates 0-6 km bulk shear of 54 knots and 0-1 km storm
relative helicities of 108 m2/s2. The environment remains
supportive of severe thunderstorms and tornadoes south of the warm
front.

05

&&

.AVIATION...
12Z TAF Discussion.

For the north the main focus will be the storms that will develop
and continue to develop over the area through at least 18Z. Went
with predominate thunderstorms for all northern sites during that
time. Went with VCTS for southern sites. Will continue to be a
complicated pattern for the next 12 hours. Finally after 3 to 6Z
the pattern will improve.

16

&&

.FIRE WEATHER...

A storm system will bring rain and thunderstorms to the area
through tonight. Rain-free weather returns Thursday through the
weekend. Critical fire weather conditions are not expected through
the next 7 days.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     78  46  61  40  62 / 100  50  20  10   0
Anniston    79  47  61  40  63 / 100  60  20  10   0
Birmingham  79  46  62  43  63 / 100  30  20  10   0
Tuscaloosa  80  46  65  43  65 / 100  30  10   0   0
Calera      80  47  63  43  64 /  80  30  10  10   0
Auburn      78  49  62  42  62 /  80  60  10  10   0
Montgomery  81  50  68  44  66 /  80  60  10   0   0
Troy        81  51  66  43  65 /  80  60  10   0   0

&&

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

&&

Hazardous weather outlook, Apr 5, 5:05 AM CDT, 5 hours 11 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
505 AM CDT Wed Apr 5 2017

ALZ011>015-017>050-061315-
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-
505 AM CDT Wed Apr 5 2017

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

.DAY ONE...Outlook Through Tonight.

Severe thunderstorms will be possible through tonight.

Round one of severe storms will be associated with a warm front as
it lifts northward through the area. The warm front will move north
of the area by 11 AM. Large hail up to the size of baseballs and
damaging winds will continue to be the dominate concerns of these
storms.

South of the warm front, isolated to scattered storms will develop
and continue to move northeast through the afternoon. This activity
will impact all of Central Alabama. Destructive and long-track
tornadoes will be possible, along with hail up to the size of
baseballs, and damaging straight line winds. These threats will
encompass all of Central Alabama with the greatest threat area along
and east of a line from Warrior to West Blocton to Uniontown.

Round three will be the along the cold front itself as it slides
through the area. Storms may develop along the line and continue to
develop through 9 PM or until the front slides east of the area.
Large hail, damaging winds and tornadoes will be be possible along
this line as well.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management is expected
from early Wednesday morning through Wednesday evening.

In the hours before

Special weather statement, Apr 5, 9:13 AM CDT, 1 hour 3 minutes before

Special Weather Statement
National Weather Service Birmingham AL
913 AM CDT WED APR 5 2017

ALZ021-051445-
Cleburne AL-
913 AM CDT WED APR 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR CLEBURNE COUNTY UNTIL 945 AM
CDT...

At 913 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles north of Mars Hills to near Abernathy
to Fosters Cross Roads. Movement was east at 45 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
Ranburne, Fruithurst, Edwardsville, Muscadine, Abernathy, Mars Hills,
Trickem, Lake Cleburne, I 20 Welcome Center, Oak Level, Borden
Springs and Micaville.

LAT...LON 3350 8535 3349 8536 3350 8563 3360 8555
      3394 8552 3394 8550 3396 8549 3396 8540
      3348 8531
TIME...MOT...LOC 1413Z 261DEG 38KT 3393 8541 3362 8544 3345 8557

17/KLAWS

Local storm report, Apr 5, 9:39 AM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
939 AM CDT WED APR 5 2017

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

0527 AM     TSTM WND DMG     2 SSW OXFORD LAKE       33.59N 85.82W
04/05/2017                   CALHOUN            AL   911 CALL CENTER

            TREES DOWN AND WATER PONDING ON ROADWAY NEAR
            THE INTERSECTION OF CHEAHA DRIVE AND COUNTY
            LINE ROAD.

&&

JH

Local storm report, Apr 5, 9:41 AM CDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
941 AM CDT WED APR 5 2017

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

0610 AM     TSTM WND DMG     3 SE GUNTHERTOWN        33.34N 85.92W
04/05/2017                   CLAY               AL   EMERGENCY MNGR

            TREE DOWN ALONG HANGING ROCK ROAD. ESTIMATED
            40-50 MPH WINDS. TIME ESTIMATED.

&&

JH

Local storm report, Apr 5, 9:43 AM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
943 AM CDT WED APR 5 2017

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

0610 AM     TSTM WND DMG     ROSELLE                 33.19N 86.05W
04/05/2017                   CLAY               AL   EMERGENCY MNGR

            TREE DOWN BLOCKING ROADWAY. COUNTY ROAD 7
            JUST SOUTH OF HIGHWAY 148. ESTIMATED 40-50
            MPH WINDS. TIME ESTIMATED.

&&

JH

Local storm report, Apr 5, 9:59 AM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
959 AM CDT WED APR 5 2017

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

0741 AM     TSTM WND DMG     1 WNW HIGHLAND LAKES    33.39N 86.66W
04/05/2017                   SHELBY             AL   BROADCAST MEDIA

            TREE DOWN BLOCKING WESTOVER ROAD NEAR OLD
            HIGHWAY 280. ESTIMATED 40-50 MPH WINDS.

&&

JH

Local storm report, Apr 5, 10:14 AM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1014 AM CDT WED APR 5 2017

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

1000 AM     HEAVY RAIN       OXFORD                  33.61N 85.84W
04/05/2017  M2.95 INCH       CALHOUN            AL   PUBLIC

            RAIN TOTAL SO FAR.

&&

JH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 1:24 AM CDT	Severe Thunderstorm Warning	BMX	Barbour	66 min
Apr 5, 2:04 AM CDT	Severe Thunderstorm Warning	BMX	Barbour, Pike	56 min
Apr 5, 2:44 AM CDT	Severe Thunderstorm Warning	BMX	Russell	32 min
Apr 5, 3:32 AM CDT	Severe Thunderstorm Warning	BMX	Russell	43 min
Apr 5, 3:35 AM CDT	Severe Thunderstorm Warning	BMX	Hale, Perry	40 min
Apr 5, 3:54 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Tuscaloosa	34 min
Apr 5, 3:57 AM CDT	Severe Thunderstorm Warning	BMX	Autauga, Lowndes, Montgomery	33 min
Apr 5, 4:11 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Perry	49 min
Apr 5, 4:45 AM CDT	Severe Thunderstorm Warning	BMX	Chilton, Shelby	44 min
Apr 5, 5:22 AM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne, Talladega	38 min
Apr 5, 5:24 AM CDT	Severe Thunderstorm Warning	BMX	Chambers, Tallapoosa	51 min
Apr 5, 6:02 AM CDT	Severe Thunderstorm Warning	BMX	Clay, Randolph	58 min
Apr 5, 6:04 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Hale, Perry	56 min
Apr 5, 6:52 AM CDT	Severe Thunderstorm Warning	BMX	Shelby	83 min
Apr 5, 7:22 AM CDT	Areal Flood Advisory	BMX	Greene, Pickens, Sumter, Tuscaloosa	3 hr
Apr 5, 7:40 AM CDT	Areal Flood Advisory	BMX	Blount, Jefferson	3 hr
Apr 5, 8:43 AM CDT	Areal Flood Advisory	BMX	Calhoun, St. Clair, Shelby, Talladega	3 hr
Apr 5, 9:00 AM CDT	Severe Thunderstorm Warning	BMX	Dallas, Lowndes	75 min
Apr 5, 9:13 AM CDT	Special Weather Statement	BMX	Cleburne	32 min
Apr 5, 9:35 AM CDT	Severe Thunderstorm Warning	BMX	Barbour, Pike	70 min
Apr 5, 10:29 AM CDT	Areal Flood Advisory	BMX	Calhoun, Clay, Cleburne, Randolph	3 hr
Apr 5, 10:38 AM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Tallapoosa	67 min
Apr 5, 10:56 AM CDT	Severe Thunderstorm Warning	BMX	Barbour	49 min
Apr 5, 11:43 AM CDT	Severe Thunderstorm Warning	BMX	Bibb, Tuscaloosa	32 min
Apr 5, 11:55 AM CDT	Severe Thunderstorm Warning	BMX	Shelby	66 min
Apr 5, 12:53 PM CDT	Special Weather Statement	BMX	Talladega	82 min
Apr 5, 1:42 PM CDT	Special Weather Statement	BMX	Cleburne	33 min
Apr 5, 2:35 PM CDT	Special Weather Statement	BMX	Cleburne	25 min
Apr 5, 3:03 PM CDT	Special Weather Statement	BMX	Talladega	42 min
Apr 5, 3:22 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Talladega	38 min
Apr 5, 3:48 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cleburne, Talladega	67 min
Apr 5, 4:08 PM CDT	Tornado Warning	BMX	Cleburne	52 min
Apr 5, 4:10 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Cherokee, Etowah	45 min
Apr 5, 4:37 PM CDT	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	26 hr
Apr 5, 4:59 PM CDT	Special Weather Statement	BMX	Randolph	46 min
Apr 5, 5:30 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, Shelby	45 min
Apr 5, 5:32 PM CDT	Special Weather Statement	BMX	Randolph	13 min
Apr 5, 5:33 PM CDT	Special Weather Statement	BMX	Randolph, Tallapoosa	57 min
Apr 5, 5:55 PM CDT	Severe Thunderstorm Warning	BMX	Chilton, Shelby	35 min
Apr 5, 5:56 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair	40 min
Apr 5, 6:03 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	27 min
Apr 5, 6:17 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	43 min
Apr 5, 6:20 PM CDT	Special Weather Statement	BMX	DeKalb	25 min
Apr 5, 6:32 PM CDT	Severe Thunderstorm Warning	BMX	St. Clair, Shelby, Talladega	27 min
Apr 5, 6:35 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	25 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.