Alert archive / Alabama / Wind Advisories in 2018

Wind Advisory 4, NWS Birmingham, AL

March 20, 201839 counties in Alabama

NWS Birmingham, AL issued this wind advisory at Mar 20, 2018, 3:06 AM CDT for 39 counties in Alabama. It took effect at Mar 20, 2018, 11:00 AM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Mar 20, 2018, 3:06 AM CDT (08:06 UTC)
In effect from
Mar 20, 2018, 11:00 AM CDT
Expired
Mar 20, 2018, 10:00 PM CDT
In force
11 hr
Issued by
NWS Birmingham, AL
All 39 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Blount County, AL, Bullock County, AL, Calhoun County, AL, Chambers County, AL, Cherokee County, AL, Chilton County, AL, Clay County, AL, Cleburne County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Etowah County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 22 km from the middle of the area, began a volume at 08:03 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 00:00Z, 8.1 hours before the alert went out and 23 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2018-03-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1154 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2018-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 334 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

522 
WWUS74 KBMX 200806
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
306 AM CDT Tue Mar 20 2018

...Strong Winds Across Much of Central Alabama Through This
Evening...

ALZ011>015-017>050-201800-
/O.NEW.KBMX.WI.Y.0004.180320T1600Z-180321T0300Z/
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-
Including the cities of Hamilton, Sulligent, Vernon, Fayette, 
Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, 
Heflin, Carrollton, Tuscaloosa, Birmingham, Hoover, Columbiana, 
Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga, 
Ashland, Roanoke, Livingston, Eutaw, Greensboro, Moundville, 
Marion, Centreville, Clanton, Rockford, Alexander City, 
Dadeville, Valley, Lanett, Lafayette, Demopolis, Linden, Selma, 
Prattville, Fort Deposit, Hayneville, Wetumpka, Tallassee, 
Montgomery, Tuskegee, Union Springs, Auburn, Opelika, 
Phenix City, Troy, and Eufaula
306 AM CDT Tue Mar 20 2018

...WIND ADVISORY IN EFFECT FROM 11 AM UNTIL 10 PM CDT THIS 
EVENING...

The National Weather Service in Birmingham has issued a Wind
Advisory, which is in effect from 11 AM to 10 PM CDT this 
evening. 

* TIMING...of the strongest winds will be this afternoon through
  10 PM.

* WINDS...of 15 to 25 mph will be possible with gusts up to 35 mph
  at times. 

* IMPACTS...of these strong winds could cause difficult driving,
  downed trees or larger limbs. Be especially cautious in areas
  where damage occurred on Monday as these winds could result in
  loose debris or damaged limbs to fall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that wind gusts of 35 mph are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

&&

$$
2 follow-up statements
923 
WWUS74 KBMX 201033
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
533 AM CDT Tue Mar 20 2018

...Patchy Dense Fog in the Northeast and Strong Winds Across All
of Central Alabama...

ALZ017>021-026>029-201500-
/O.NEW.KBMX.FG.Y.0006.180320T1033Z-180320T1400Z/
/O.CON.KBMX.WI.Y.0004.180320T1600Z-180321T0300Z/
Blount-Etowah-Calhoun-Cherokee-Cleburne-St. Clair-Talladega-Clay-
Randolph-
Including the cities of Oneonta, Gadsden, Anniston, Centre, 
Heflin, Pell City, Moody, Talladega, Sylacauga, Ashland, 
and Roanoke
533 AM CDT Tue Mar 20 2018

...DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...WIND ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
10 PM CDT THIS EVENING...

The National Weather Service in Birmingham has issued a Dense Fog
Advisory, which is in effect until 9 AM CDT this morning. 

* TIMING...of the strongest winds will be this afternoon through
  10 PM. The Dense Fog will be possible through 9 AM.

* WINDS...of 15 to 25 mph will be possible with gusts up to 35 
  mph at times. 

* VISIBILITY...will drop to one quarter of mile or less at times. 

* Impacts...of these strong winds could cause difficult driving, 
  downed trees or larger limbs. Be especially cautious in areas 
  where damage occurred on Monday as these winds could result in 
  loose debris or damaged limbs to fall. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that wind gusts of 35 mph are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

A Dense Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving, slow down, use
your low beam headlights, and leave plenty of distance ahead of
you.

&&

$$

ALZ011>015-022>025-030>050-201500-
/O.CON.KBMX.WI.Y.0004.180320T1600Z-180321T0300Z/
Marion-Lamar-Fayette-Winston-Walker-Pickens-Tuscaloosa-Jefferson-
Shelby-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
Including the cities of Hamilton, Sulligent, Vernon, Fayette, 
Double Springs, Jasper, Carrollton, Tuscaloosa, Birmingham, 
Hoover, Columbiana, Pelham, Alabaster, Livingston, Eutaw, 
Greensboro, Moundville, Marion, Centreville, Clanton, Rockford, 
Alexander City, Dadeville, Valley, Lanett, Lafayette, Demopolis, 
Linden, Selma, Prattville, Fort Deposit, Hayneville, Wetumpka, 
Tallassee, Montgomery, Tuskegee, Union Springs, Auburn, Opelika, 
Phenix City, Troy, and Eufaula
533 AM CDT Tue Mar 20 2018

...WIND ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
10 PM CDT THIS EVENING...

* TIMING...of the strongest winds will be this afternoon through 
  10 PM. 

* WINDS...of 15 to 25 mph will be possible with gusts up to 35 
  mph at times. 

* IMPACTS...of these strong winds could cause difficult driving, 
  downed trees or larger limbs. Be especially cautious in areas 
  where damage occurred on Monday as these winds could result in 
  loose debris or damaged limbs to fall. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that wind gusts of 35 mph are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

&&

$$
808 
WWUS74 KBMX 201442
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
942 AM CDT Tue Mar 20 2018

...Strong Winds Across All of Central Alabama Today...

ALZ011>015-017>050-210300-
/O.CON.KBMX.WI.Y.0004.180320T1600Z-180321T0300Z/
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-
Including the cities of Hamilton, Sulligent, Vernon, Fayette, 
Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, 
Heflin, Carrollton, Tuscaloosa, Birmingham, Hoover, Columbiana, 
Pelham, Alabaster, Pell City, Moody, Talladega, Sylacauga, 
Ashland, Roanoke, Livingston, Eutaw, Greensboro, Moundville, 
Marion, Centreville, Clanton, Rockford, Alexander City, 
Dadeville, Valley, Lanett, Lafayette, Demopolis, Linden, Selma, 
Prattville, Fort Deposit, Hayneville, Wetumpka, Tallassee, 
Montgomery, Tuskegee, Union Springs, Auburn, Opelika, 
Phenix City, Troy, and Eufaula
942 AM CDT Tue Mar 20 2018

...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM CDT THIS EVENING...

* TIMING...of the strongest winds will be this afternoon through 
  10 PM. 

* WINDS...of 15 to 25 mph will be possible with gusts up to 35 
  mph at times. 

* IMPACTS...of these strong winds could cause difficult driving, 
  downed trees or larger limbs. Be especially cautious in areas 
  where damage occurred on Monday as these winds could result in 
  loose debris or damaged limbs to fall. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that wind gusts of 35 mph are expected.
Winds this strong can make driving difficult...especially for
high profile vehicles. Use extra caution.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 19, 7:03 PM CDTSevere Thunderstorm WarningBMXBlount42 min
Mar 19, 7:18 PM CDTTornado WarningBMXBlount31 min
Mar 19, 7:29 PM CDTTornado WarningBMXEtowah61 min
Mar 19, 7:41 PM CDTSevere Thunderstorm WarningBMXBlount, St. Clair34 min
Mar 19, 7:43 PM CDTSevere Thunderstorm WarningBMXEtowah62 min
Mar 19, 7:49 PM CDTSevere Thunderstorm WarningBMXBlount56 min
Mar 19, 8:02 PM CDTTornado WarningBMXCherokee58 min
Mar 19, 8:09 PM CDTSevere Thunderstorm WarningBMXCalhoun66 min
Mar 19, 8:15 PM CDTTornado WarningBMXCalhoun, Etowah45 min
Mar 19, 8:33 PM CDTTornado WarningBMXSt. Clair42 min
Mar 19, 8:38 PM CDTTornado WarningBMXCleburne46 min
Mar 19, 8:48 PM CDTTornado WarningBMXCalhoun42 min
Mar 19, 9:05 PM CDTTornado WarningBMXCalhoun21 min
Mar 19, 9:24 PM CDTAreal Flood AdvisoryBMXBlount, Calhoun, Etowah, St. Clair6 hr
Mar 19, 9:27 PM CDTSevere Thunderstorm WarningBMXCalhoun, Cleburne34 min
Mar 19, 9:46 PM CDTSevere Thunderstorm WarningBMXCalhoun, St. Clair, Talladega59 min
Mar 19, 10:20 PM CDTSevere Thunderstorm WarningBMXCleburne40 min
Mar 19, 11:01 PM CDTAreal Flood AdvisoryBMXCalhoun, Cleburne, Talladega3 hr
Mar 20, 5:33 AM CDTDense Fog AdvisoryBMXBlount, Calhoun, Cherokee, Clay, Cleburne, Etowah and 3 more3 hr

Nearby

Wind Advisories in Alabama, 2018Every wind advisory 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.