Alert archive / Alabama / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Birmingham, AL

March 19, 2018Calhoun County, Cleburne County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 19, 2018, 9:27 PM CDT for Calhoun County, Cleburne County, Alabama. It was in force for 34 min. 4 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: Mar 19, 2018, 9:27 PM CDT (02:27 UTC)
Expired: Mar 19, 2018, 10:01 PM CDT
In force: 34 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Calhoun County, AL, Cleburne County, AL

The radar

The Atlanta radar (KFFC), 110 km from the middle of the area, began a volume at 02:27 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.

What was reported inside it

Time	Report	Where	Remark
Mar 19, 9:32 PM CDT	HAIL 1	Choccolocco, AL
Mar 19, 9:35 PM CDT	HAIL 1.25	Choccolocco, AL
Mar 19, 9:37 PM CDT	HAIL 1.5	4 Nne Choccolocco, AL	NEAR WHITE PLAINS.
Mar 19, 9:42 PM CDT	HAIL 1.75	1 Ne Heflin, AL

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 19, 3:28 PM CDT	Tornado Watch PDS	SPC	9 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 2.5 hours before the alert went out and 113 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: 1154 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1046 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 409 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 17.4

Open this sounding in Storm Lab

The text

As transmitted.

253 
WUUS54 KBMX 200227
SVRBMX
ALC015-029-200330-
/O.NEW.KBMX.SV.W.0021.180320T0227Z-180320T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Birmingham AL
927 PM CDT MON MAR 19 2018

The National Weather Service in Birmingham has issued a

* Severe Thunderstorm Warning for...
  Southeastern Calhoun County in east central Alabama...
  Southeastern Cleburne County in east central Alabama...

* Until 1030 PM CDT

* At 927 PM CDT, a severe thunderstorm was located over Saks, 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...
  Anniston, Oxford, Heflin, Fort McClellan, Saks, Cobb Town, West
  End-Cobb Town, Weaver, Hobson City, Fruithurst, Edwardsville,
  Muscadine, Abernathy, Oxford Lake, Blue Mountain, Bynum,
  Alexandria, Sweetwater Lake, Choccolocco and Lake Cleburne.

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 1100 PM CDT for east central
Alabama.

LAT...LON 3361 8597 3375 8589 3376 8536 3356 8532
TIME...MOT...LOC 0227Z 273DEG 44KT 3371 8582 

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

87/GRANTHAM

4 follow-up statements

515 
WWUS54 KBMX 200232
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
932 PM CDT MON MAR 19 2018

ALC015-029-200330-
/O.CON.KBMX.SV.W.0021.000000T0000Z-180320T0330Z/
Calhoun AL-Cleburne AL-
932 PM CDT MON MAR 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN CALHOUN AND SOUTHEASTERN CLEBURNE COUNTIES...

At 932 PM CDT, severe thunderstorms were located along a line
extending from near Heflin to Anniston, moving east at 55 mph.

HAZARD...Golf ball size hail and 70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings. 

Locations impacted include...
Anniston, Oxford, Heflin, Fort McClellan, Cobb Town, West End-Cobb
Town, Saks, Weaver, Hobson City, Fruithurst, Edwardsville, Muscadine,
Abernathy, Oxford Lake, Blue Mountain, Sweetwater Lake, Choccolocco,
Lake Cleburne, Dearmanville and I 20 Welcome Center.

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 1100 PM CDT for east central
Alabama.

LAT...LON 3361 8592 3375 8581 3376 8536 3356 8532
TIME...MOT...LOC 0232Z 274DEG 49KT 3373 8560 3366 8580 

HAIL...1.75IN
WIND...70MPH
 
$$

87/GRANTHAM

670 
WWUS54 KBMX 200243
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
943 PM CDT MON MAR 19 2018

ALC015-200253-
/O.CAN.KBMX.SV.W.0021.000000T0000Z-180320T0330Z/
Calhoun AL-
943 PM CDT MON MAR 19 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CALHOUN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for east central
Alabama.

LAT...LON 3359 8563 3359 8569 3363 8568 3363 8566
      3365 8564 3375 8564 3376 8536 3356 8532
TIME...MOT...LOC 0243Z 276DEG 40KT 3366 8559 

$$

ALC029-200330-
/O.CON.KBMX.SV.W.0021.000000T0000Z-180320T0330Z/
Cleburne AL-
943 PM CDT MON MAR 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN CLEBURNE COUNTY...

At 943 PM CDT, a severe thunderstorm was located over Heflin, moving
east at 45 mph.

HAZARD...Tennis ball size hail and 70 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings. 

Locations impacted include...
Heflin, Fruithurst, Edwardsville, Muscadine, Abernathy, Lake
Cleburne, I 20 Welcome Center and Sweetwater Lake.

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 1100 PM CDT for east central
Alabama.

LAT...LON 3359 8563 3359 8569 3363 8568 3363 8566
      3365 8564 3375 8564 3376 8536 3356 8532
TIME...MOT...LOC 0243Z 276DEG 40KT 3366 8559 

HAIL...2.50IN
WIND...70MPH
 
$$

87/GRANTHAM

213 
WWUS54 KBMX 200255
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
955 PM CDT MON MAR 19 2018

ALC029-200330-
/O.CON.KBMX.SV.W.0021.000000T0000Z-180320T0330Z/
Cleburne AL-
955 PM CDT MON MAR 19 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN CLEBURNE COUNTY...

At 955 PM CDT, a severe thunderstorm was located over Abernathy, or
12 miles east of Heflin, moving east at 55 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Fruithurst, Edwardsville, Abernathy and I 20 Welcome Center. 

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 1100 PM CDT for east central
Alabama.

LAT...LON 3358 8554 3373 8549 3373 8535 3356 8532
TIME...MOT...LOC 0255Z 274DEG 47KT 3364 8538 

HAIL...1.75IN
WIND...60MPH
 
$$

87/GRANTHAM

345 
WWUS54 KBMX 200301
SVSBMX

Severe Weather Statement
National Weather Service Birmingham AL
1001 PM CDT MON MAR 19 2018

ALC029-200311-
/O.CAN.KBMX.SV.W.0021.000000T0000Z-180320T0330Z/
Cleburne AL-
1001 PM CDT MON MAR 19 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLEBURNE COUNTY
IS CANCELLED...
                
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 has been cancelled.

A tornado watch remains in effect until 1100 PM CDT for east central
Alabama.

LAT...LON 3358 8554 3373 8549 3373 8535 3356 8532
TIME...MOT...LOC 0259Z 273DEG 44KT 3363 8528 

$$

87/GRANTHAM

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 19, 7:03 PM CDT	Severe Thunderstorm Warning	BMX	Blount	42 min
Mar 19, 7:18 PM CDT	Tornado Warning	BMX	Blount	31 min
Mar 19, 7:29 PM CDT	Tornado Warning	BMX	Etowah	61 min
Mar 19, 7:41 PM CDT	Severe Thunderstorm Warning	BMX	Blount, St. Clair	34 min
Mar 19, 7:43 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	62 min
Mar 19, 7:49 PM CDT	Severe Thunderstorm Warning	BMX	Blount	56 min
Mar 19, 8:02 PM CDT	Tornado Warning	BMX	Cherokee	58 min
Mar 19, 8:09 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun	66 min
Mar 19, 8:15 PM CDT	Tornado Warning	BMX	Calhoun, Etowah	45 min
Mar 19, 8:33 PM CDT	Tornado Warning	BMX	St. Clair	42 min
Mar 19, 8:38 PM CDT	Tornado Warning	BMX	Cleburne	46 min
Mar 19, 8:48 PM CDT	Tornado Warning	BMX	Calhoun	42 min
Mar 19, 9:05 PM CDT	Tornado Warning	BMX	Calhoun	21 min
Mar 19, 9:24 PM CDT	Areal Flood Advisory	BMX	Blount, Calhoun, Etowah, St. Clair	6 hr
Mar 19, 9:46 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, St. Clair, Talladega	59 min
Mar 19, 10:20 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	40 min
Mar 19, 11:01 PM CDT	Areal Flood Advisory	BMX	Calhoun, Cleburne, Talladega	3 hr
Mar 20, 3:06 AM CDT	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	19 hr
Mar 20, 5:33 AM CDT	Dense Fog Advisory	BMX	Blount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 3 more	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.