Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 1, NWS Birmingham, AL

January 22, 2018Dallas County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jan 22, 2018, 1:12 PM CST for Dallas County, Alabama. It was in force for 33 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: Jan 22, 2018, 1:12 PM CST (19:12 UTC)
Expired: Jan 22, 2018, 1:45 PM CST
In force: 33 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Dallas County, AL

The radar

The Birmingham radar (KBMX), 109 km from the middle of the area, began a volume at 19:12 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, 7.2 hours before the alert went out and 110 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1509 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

235 
WUUS54 KBMX 221912
SVRBMX
ALC047-221945-
/O.NEW.KBMX.SV.W.0001.180122T1912Z-180122T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
112 PM CST MON JAN 22 2018

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southeastern Dallas County in south central Alabama...

* Until 145 PM CST

* At 112 PM CST, a severe thunderstorm was located near Dallas Lake,
  or 14 miles southwest of Selmont-West Selmont, moving east at 35
  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...
  Dallas Lake, Old Cahaba Park, Belknap, Dannelly Reservoir, Tyler,
  Tilden, Whites Bluff, Carlowville, Minter and Craig Field Aiport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3206 8718 3208 8719 3212 8726 3214 8725
      3215 8727 3229 8722 3240 8684 3237 8681
      3235 8681 3233 8685 3231 8685 3230 8683
      3227 8686 3224 8683 3223 8681 3222 8691
      3205 8691 3205 8718
TIME...MOT...LOC 1912Z 260DEG 33KT 3218 8711 

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

JH/05

2 follow-up statements

634 
WWUS54 KBMX 221927
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
127 PM CST MON JAN 22 2018

ALC047-221945-
/O.CON.KBMX.SV.W.0001.000000T0000Z-180122T1945Z/
Dallas AL-
127 PM CST MON JAN 22 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM CST
FOR SOUTHEASTERN DALLAS COUNTY...

At 127 PM CST, a severe thunderstorm was located near Belknap, or 12
miles south of Selmont-West Selmont, moving east at 40 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...
Dallas Lake and Belknap. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3210 8711 3227 8704 3232 8685 3231 8685
      3230 8683 3227 8686 3224 8683 3223 8681
      3222 8691 3210 8691
TIME...MOT...LOC 1927Z 260DEG 33KT 3220 8695 

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

JH/05

432 
WWUS54 KBMX 221935
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
135 PM CST MON JAN 22 2018

ALC047-221945-
/O.EXP.KBMX.SV.W.0001.000000T0000Z-180122T1945Z/
Dallas AL-
135 PM CST MON JAN 22 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DALLAS COUNTY
WILL EXPIRE AT 145 PM CST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.

LAT...LON 3210 8711 3227 8704 3232 8685 3231 8685
      3230 8683 3227 8686 3224 8683 3223 8681
      3222 8691 3210 8691
TIME...MOT...LOC 1935Z 260DEG 21KT 3221 8691 

$$

JH/05

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 Jan 22, 11:40 AM CST, 1 hour 32 minutes earlier.

Area forecast discussion, Jan 22, 11:40 AM CST, 1 hour 32 minutes before

Area Forecast Discussion
National Weather Service Birmingham AL
1140 AM CST Mon Jan 22 2018

.UPDATE...
For 18Z Aviation.

&&

.DISCUSSION...

Showers and storms are ongoing in a band stretching from the
Missouri Bootheel southward into central Louisiana along a cold
front. This system will be headed in our direction today, and the
potential for severe storms remains unclear.

Models have generally trended somewhat more impressive with
moisture quality across the warm sector for this afternoon, which
would definitely increase our severe weather risk. With relatively
steep mid-level lapse rates and 0-1 SRH of 200-300 m2/s2, this
scenario could yield bowing segments or a few robust supercells.
Potential threats include isolated damaging winds, quarter size
hail, and a couple of tornadoes.

On the other hand, if the convective band to our west holds
together longer and moves faster than some models indicate, it
may end up contaminating and disrupting the warm sector. This would
probably shunt the severe weather risk southward to along and
south of U.S. Highway 80.

Today's system should move through rather quickly, and most of the
rain should be gone by 8 PM. High pressure and dry weather will
return for Tuesday through Friday. A progressive trough will emerge
across the Plains late in the week, and rain chances should
increase for late Friday night through Sunday.

87/Grantham

&&

.AVIATION...
18Z TAF Discussion.

--Line of rain and some t'storms move through this afternoon;
 improving conditions tonight--

As of 17:40Z/11:40AM, Doppler RADAR showed a band of rain and a
few embedded thunderstorms moving eastward through Central
Alabama. This activity will affect all terminals with ceilings
and visibilities mainly in MVFR range, perhaps a transient
occurrence of IFR.

Clearing conditions will occur from west-to-east tonight, with VFR
expected through Tuesday. Surface winds will swing from southerly
this afternoon to ~westerly for tonight and Tuesday.

89^GSatterwhite

&&

.FIRE WEATHER...

Moisture and southerly flow will continue to increase today ahead
of a cold front. Rain is likely this afternoon and evening as the
front moves across the area. Dry and mild conditions will return
for Tuesday through Thursday. There are no fire weather concerns.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     64  41  52  29  53 /  90  70   0   0   0
Anniston    66  40  55  29  54 /  90  70   0   0   0
Birmingham  64  40  54  32  55 /  90  40   0   0   0
Tuscaloosa  69  41  56  32  57 / 100  20   0   0   0
Calera      67  42  56  32  56 /  90  50   0   0   0
Auburn      69  44  58  33  56 /  70  70   0   0   0
Montgomery  72  41  60  34  58 /  80  70   0   0   0
Troy        72  46  61  35  58 /  80  70   0   0   0

&&

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

&&

Hazardous weather outlook, Jan 22, 9:24 AM CST, 3 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
924 AM CST Mon Jan 22 2018

ALZ011>015-017>050-231830-
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-
924 AM CST Mon Jan 22 2018

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

.DAY ONE...Today and Tonight.

There is a low confidence threat of severe thunderstorms across the
southern two-thirds of Central Alabama, generally along and south of
a line from Carrollton to Hoover to Mt. Cheaha, through 7 pm. A
brief tornado and isolated damaging wind gusts will be possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
through tonight.

In the hours before

Special weather statement, Jan 22, 10:32 AM CST, 2 hours 40 minutes before

Special Weather Statement
National Weather Service Birmingham AL
1032 AM CST MON JAN 22 2018

ALZ022-030-031-221730-
Greene AL-Pickens AL-Sumter AL-
1032 AM CST MON JAN 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN PICKENS...GREENE AND
NORTHWESTERN SUMTER COUNTIES UNTIL 1130 AM CST...

At 1031 AM CST, Doppler radar was tracking a strong thunderstorm over
Electric Mills, or 17 miles northeast of Meridian Station, moving
east at 35 mph.

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

Locations impacted include...
Eutaw, Aliceville, Gordo, Carrollton, Pickensville, Boligee, Union,
Gainesville, Epes, Emelle, McMullen, Panola, Walden Quarters, West
Greene, Benevola, Johnston Lake, Bevill Lock And Dam, Garden, New
West Greene and Mantua.

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 3326 8831 3338 8784 3302 8783 3302 8778
      3290 8777 3290 8781 3286 8783 3280 8782
      3276 8787 3277 8783 3275 8781 3266 8838
TIME...MOT...LOC 1631Z 255DEG 29KT 3277 8848

JH/05

Special weather statement, Jan 22, 11:10 AM CST, 2 hours 2 minutes before

Special Weather Statement
National Weather Service Birmingham AL
1110 AM CST MON JAN 22 2018

ALZ039-221815-
Marengo AL-
1110 AM CST MON JAN 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR MARENGO COUNTY UNTIL 1215 PM
CST...

At 1110 AM CST, Doppler radar was tracking a strong thunderstorm near
Butler, moving east at 45 mph.

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

Locations impacted include...
Linden, Thomaston, Sweet Water, Myrtlewood, Dayton, Putnam, Freddie
Jones Field, Nanafalia, Consul, Magnolia, Wayne, Surginer, Miller,
Dixons Mill, Vineland, Half Acre, Carleys, Octagon, Clayhill and
Nicholsville.

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 3206 8812 3208 8804 3214 8804 3218 8801
      3228 8802 3230 8800 3231 8794 3232 8794
      3242 8752 3231 8752 3231 8747 3226 8747
      3227 8748 3225 8752 3213 8752 3213 8762
      3200 8763 3199 8799 3200 8811
TIME...MOT...LOC 1710Z 257DEG 38KT 3210 8815

JH/05

Special weather statement, Jan 22, 12:37 PM CST, 35 minutes before

Special Weather Statement
National Weather Service Birmingham AL
1237 PM CST MON JAN 22 2018

ALZ040-221915-
Dallas AL-
1237 PM CST MON JAN 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN DALLAS COUNTY UNTIL 115
PM CST...

At 1237 PM CST, Doppler radar was tracking a strong thunderstorm near
Central Mills, or 15 miles north of Camden, moving northeast at 35
mph.

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

Locations impacted include...
Selma, Selmont-West Selmont, Orrville, Belknap, Bogue Chitto, Central
Mills, Dallas Lake, Old Cahaba Park, Memorial Stadium, Dannelly
Reservoir, Dallas County Horse Arena, Potter Station, Skyharbor
Airport, Whites Bluff, Safford, Hazen, Craig Field Aiport and
Crumptonia.

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 3210 8723 3212 8724 3212 8726 3214 8725
      3215 8728 3217 8729 3218 8732 3220 8732
      3220 8736 3224 8739 3224 8741 3227 8745
      3227 8747 3228 8746 3249 8717 3249 8712
      3223 8686 3222 8691 3218 8691 3208 8719
TIME...MOT...LOC 1837Z 237DEG 30KT 3220 8738

JH/05

Special weather statement, Jan 22, 1:10 PM CST, 2 minutes before

Special Weather Statement
National Weather Service Birmingham AL
110 PM CST MON JAN 22 2018

ALZ040>042-222015-
Autauga AL-Lowndes AL-Dallas AL-
110 PM CST MON JAN 22 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN AUTAUGA...WESTERN
LOWNDES AND SOUTHEASTERN DALLAS COUNTIES UNTIL 215 PM CST...

At 110 PM CST, Doppler radar was tracking strong thunderstorms along
a line extending from Old Cahaba Park to near Dannelly Reservoir to 7
miles northeast of Camden. Movement was east at 30 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Mosses, Hayneville, Selmont-West Selmont, Autaugaville, White Hall,
Gordonville, Lowndesboro, Benton, Beechwood, Tyler, Autauga County
Airport, Old Cahaba Park, Dannelly Reservoir, Belknap, Dallas Lake,
Carlowville, Robert F. Henry Lock And Dam, Minter, Craig Field Aiport
and Selma Drag Strip.

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 3201 8686 3205 8686 3205 8718 3206 8718
      3207 8719 3208 8719 3210 8723 3212 8724
      3212 8726 3218 8722 3235 8718 3248 8649
      3216 8658 3199 8667
TIME...MOT...LOC 1910Z 263DEG 25KT 3231 8710 3215 8712 3208 8724

JH/05

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 22, 10:32 AM CST	Special Weather Statement	BMX	Greene, Pickens	58 min
Jan 22, 11:10 AM CST	Special Weather Statement	BMX	Marengo	65 min
Jan 22, 12:37 PM CST	Special Weather Statement	BMX	Dallas	38 min
Jan 22, 1:10 PM CST	Special Weather Statement	BMX	Dallas, Lowndes	65 min
Jan 22, 2:52 PM CST	Special Weather Statement	BMX	Montgomery	23 min
Jan 22, 3:21 PM CST	Special Weather Statement	BMX	Elmore	24 min
Jan 22, 3:33 PM CST	Areal Flood Advisory	BMX	Elmore, Lowndes, Montgomery	117 min
Jan 22, 4:42 PM CST	Special Weather Statement	BMX	Lee, Macon	33 min
Jan 22, 5:32 PM CST	Areal Flood Advisory	BMX	Elmore, Lowndes, Macon, Montgomery	118 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2018 Every severe thunderstorm warning 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.