Alert archive / Alabama / Frost Advisories in 2018

Frost Advisory 3, NWS Birmingham, AL

March 13, 201815 counties in Alabama

NWS Birmingham, AL issued this frost advisory at Mar 13, 2018, 3:33 AM CDT for 15 counties in Alabama. It took effect at Mar 14, 2018, 12:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Mar 13, 2018, 3:33 AM CDT (08:33 UTC)
In effect from
Mar 14, 2018, 12:00 AM CDT
Expired
Mar 14, 2018, 10:00 AM CDT
In force
10 hr
Issued by
NWS Birmingham, AL

Counties Autauga County, AL, Barbour County, AL, Bullock County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Russell County, AL, Sumter County, AL

The radar

The Maxwell AFB radar (KMXX), 82 km from the middle of the area, began a volume at 08:36 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, 8.6 hours before the alert went out and 92 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 2018-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2018-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 67 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1927 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
67 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

189 
WWUS74 KBMX 130833
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
333 AM CDT Tue Mar 13 2018

...Freezing Temperatures Possible Tonight and Tomorrow Night...

.A colder airmass will settle across the area tonight, putting
the northern half of the area generally at or below freezing
early Tuesday morning. Further south, temperatures will stay
above freezing for most of the area but will still be in the low
to mid 30s, resulting in patchy frost. There could be a few spots
in the south that drop to 32 degrees but those will be more
localized than across the north. Colder conditions are possible
for the next few nights as well.

ALZ011>015-017>021-024>029-036>038-131800-
/O.UPG.KBMX.FZ.A.0002.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FZ.W.0004.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
/O.CON.KBMX.FZ.W.0003.000000T0000Z-180313T1400Z/
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-
Cherokee-Cleburne-Jefferson-Shelby-St. Clair-Talladega-Clay-
Randolph-Coosa-Tallapoosa-Chambers-
Including the cities of Hamilton, Sulligent, Vernon, Fayette, 
Double Springs, Jasper, Oneonta, Gadsden, Anniston, Centre, 
Heflin, Birmingham, Hoover, Columbiana, Pelham, Alabaster, 
Pell City, Moody, Talladega, Sylacauga, Ashland, Roanoke, 
Rockford, Alexander City, Dadeville, Valley, Lanett, 
and Lafayette
333 AM CDT Tue Mar 13 2018

...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM CDT
WEDNESDAY...
...FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY MORNING...

The National Weather Service in Birmingham has issued a Freeze
Warning, which is in effect from midnight tonight to 10 AM CDT
Wednesday. A Freeze Watch has also been issued. This Freeze Watch
is in effect from late Wednesday night through Thursday morning.
The Freeze Watch is no longer in effect. 

* TEMPERATURE...will be between 28 and 33 degrees overnight 
  tonight. Then temperatures will be between 25 and 32 degrees 
  by Wednesday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$

ALZ022-023-034-035-047-131800-
/O.UPG.KBMX.FZ.A.0002.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FZ.W.0004.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
/O.CON.KBMX.FR.Y.0002.000000T0000Z-180313T1400Z/
Pickens-Tuscaloosa-Bibb-Chilton-Lee-
Including the cities of Carrollton, Tuscaloosa, Centreville, 
Clanton, Auburn, and Opelika
333 AM CDT Tue Mar 13 2018

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM CDT
WEDNESDAY...
...FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY MORNING...

The National Weather Service in Birmingham has issued a Freeze
Warning, which is in effect from midnight tonight to 10 AM CDT
Wednesday. A Freeze Watch has also been issued. This Freeze Watch
is in effect from late Wednesday night through Thursday morning.
The Freeze Watch is no longer in effect. 

* TEMPERATURE...will be between 32 and 36 degrees overnight 
  tonight. Then temperatures will be between 28 and 33 degrees 
  by Wednesday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$

ALZ030>033-039>046-048>050-131800-
/O.UPG.KBMX.FZ.A.0002.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FR.Y.0003.180314T0500Z-180314T1500Z/
/O.NEW.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
/O.CON.KBMX.FR.Y.0002.000000T0000Z-180313T1400Z/
Sumter-Greene-Hale-Perry-Marengo-Dallas-Autauga-Lowndes-Elmore-
Montgomery-Macon-Bullock-Russell-Pike-Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, Demopolis, Linden, Selma, Prattville, 
Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, 
Tuskegee, Union Springs, Phenix City, Troy, and Eufaula
333 AM CDT Tue Mar 13 2018

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM CDT THIS MORNING...
...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM CDT
WEDNESDAY...
...FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
THURSDAY MORNING...

The National Weather Service in Birmingham has issued a Frost
Advisory, which is in effect from midnight tonight to 10 AM CDT
Wednesday. A Freeze Watch has also been issued. This Freeze Watch
is in effect from late Wednesday night through Thursday morning.
The Freeze Watch is no longer in effect. 

* TEMPERATURE...will be between 32 and 36 degrees overnight 
  tonight. Then temperatures will be between 28 and 33 degrees 
  by Wednesday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$
4 follow-up statements
653 
WWUS74 KBMX 131510
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
1010 AM CDT Tue Mar 13 2018

...Freezing Temperatures Possible Tonight and Tomorrow Night...

.A colder airmass will remain over Central Alabama tonight, 
putting the northern two thirds of the area generally at or below
freezing early Wednesday morning. Further south, temperatures 
will stay above freezing for most of the area but will still be in
the low to mid 30s, resulting in patchy frost. There could be a 
few spots in the south that drop to 32 degrees but those will be 
more localized than across the north. Temperatures will drop into
the 27 to 34 degree range again Thursday morning.

ALZ011>015-017>029-034>038-047-140300-
/O.CON.KBMX.FZ.W.0004.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-
Cherokee-Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-
Talladega-Clay-Randolph-Bibb-Chilton-Coosa-Tallapoosa-Chambers-
Lee-
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, Centreville, Clanton, Rockford, Alexander City,
Dadeville, Valley, Lanett, Lafayette, Auburn, and Opelika
1010 AM CDT Tue Mar 13 2018

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...will be between 25 and 32 degrees by Wednesday
  morning and 27 to 34 degrees on Thursday morning.

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$

ALZ030>033-039>046-048>050-140300-
/O.CON.KBMX.FR.Y.0003.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Sumter-Greene-Hale-Perry-Marengo-Dallas-Autauga-Lowndes-Elmore-
Montgomery-Macon-Bullock-Russell-Pike-Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, Demopolis, Linden, Selma, Prattville, 
Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, 
Tuskegee, Union Springs, Phenix City, Troy, and Eufaula
1010 AM CDT Tue Mar 13 2018

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...28 and 34 degrees by Wednesday morning. A
  widespread freeze is not anticipated.

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$
799 
WWUS74 KBMX 131944
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
244 PM CDT Tue Mar 13 2018

...Freezing Temperatures again Overnight and possible Wednesday 
night...

.A cold airmass will remain over Central Alabama tonight, putting
the northern two thirds of the area generally at or below 
freezing early Wednesday morning. Further south, temperatures will
stay above freezing for most of the area but will still be in the
low to mid 30s, resulting in patchy frost. There could be a few 
spots in the south that drop to 32 degrees but those will be more 
localized than across the north. Temperatures will drop into the 
27 to 34 degree range again Thursday morning.

ALZ011>015-017>029-034>038-047-140600-
/O.CON.KBMX.FZ.W.0004.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-
Cherokee-Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-
Talladega-Clay-Randolph-Bibb-Chilton-Coosa-Tallapoosa-Chambers-
Lee-
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, Centreville, Clanton, Rockford, Alexander City,
Dadeville, Valley, Lanett, Lafayette, Auburn, and Opelika
244 PM CDT Tue Mar 13 2018

...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...will be between 25 and 33 degrees by Wednesday 
  morning and 27 to 34 degrees on Thursday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

A Freeze Warning means sub-freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$

ALZ030>033-039>046-048>050-140600-
/O.CON.KBMX.FR.Y.0003.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Sumter-Greene-Hale-Perry-Marengo-Dallas-Autauga-Lowndes-Elmore-
Montgomery-Macon-Bullock-Russell-Pike-Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, Demopolis, Linden, Selma, Prattville, 
Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, 
Tuskegee, Union Springs, Phenix City, Troy, and Eufaula
244 PM CDT Tue Mar 13 2018

...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...28 and 34 degrees by Wednesday morning. A 
  widespread freeze is not anticipated. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$
203 
WWUS74 KBMX 140406
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
1106 PM CDT Tue Mar 13 2018

...Freezing Temperatures again Overnight and possible Wednesday
night...

.A cold airmass will remain over Central Alabama tonight, putting
the northern two thirds of the area generally at or below
freezing early Wednesday morning. Further south, temperatures
will stay above freezing for most of the area but will still be
in the low to mid 30s, resulting in patchy frost. There could be
a few spots in the south that drop to 32 degrees but those will
be more localized than across the north. Temperatures will drop
into the 27 to 34 degree range again Thursday morning.

ALZ011>015-017>029-034>038-047-141600-
/O.CON.KBMX.FZ.W.0004.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-
Cherokee-Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-
Talladega-Clay-Randolph-Bibb-Chilton-Coosa-Tallapoosa-Chambers-
Lee-
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, Centreville, Clanton, Rockford, Alexander City,
Dadeville, Valley, Lanett, Lafayette, Auburn, and Opelika
1106 PM CDT Tue Mar 13 2018

...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...will be between 25 and 33 degrees by Wednesday 
  morning and 27 to 34 degrees on Thursday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

A Freeze Watch means sub freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$

ALZ030>033-039>046-048>050-141600-
/O.CON.KBMX.FR.Y.0003.180314T0500Z-180314T1500Z/
/O.CON.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
Sumter-Greene-Hale-Perry-Marengo-Dallas-Autauga-Lowndes-Elmore-
Montgomery-Macon-Bullock-Russell-Pike-Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, Demopolis, Linden, Selma, Prattville, 
Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, 
Tuskegee, Union Springs, Phenix City, Troy, and Eufaula
1106 PM CDT Tue Mar 13 2018

...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT WEDNESDAY...
...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT
THROUGH THURSDAY MORNING...

* TEMPERATURE...28 and 34 degrees by Wednesday morning. A 
  widespread freeze is not anticipated. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Watch means sub-freezing temperatures are possible.
These conditions could kill crops and other sensitive vegetation.

&&

$$
763 
WWUS74 KBMX 140823
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
323 AM CDT Wed Mar 14 2018

...Freezing Temperatures This Morning and again Thursday Morning...

ALZ011>015-017>029-034>038-047-141700-
/O.UPG.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
/O.NEW.KBMX.FZ.W.0005.180315T0500Z-180315T1400Z/
/O.CON.KBMX.FZ.W.0004.000000T0000Z-180314T1500Z/
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-
Cherokee-Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-
Talladega-Clay-Randolph-Bibb-Chilton-Coosa-Tallapoosa-Chambers-
Lee-
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, Centreville, Clanton, Rockford, Alexander City,
Dadeville, Valley, Lanett, Lafayette, Auburn, and Opelika
323 AM CDT Wed Mar 14 2018

...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM CDT THIS
MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT
THURSDAY...

The National Weather Service in Birmingham has issued a Freeze
Warning, which is in effect through 10 am this morning, and again 
tonight from Midnight to 9 AM CDT Thursday. The Freeze Watch is 
no longer in effect. 

* TEMPERATURE...will be between 27 and 33 degrees this morning and
  25 to 32 degrees on Thursday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

ALZ030>033-039>046-048>050-141700-
/O.UPG.KBMX.FZ.A.0003.180315T0500Z-180315T1400Z/
/O.NEW.KBMX.FZ.W.0005.180315T0500Z-180315T1400Z/
/O.CON.KBMX.FR.Y.0003.000000T0000Z-180314T1500Z/
Sumter-Greene-Hale-Perry-Marengo-Dallas-Autauga-Lowndes-Elmore-
Montgomery-Macon-Bullock-Russell-Pike-Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, Demopolis, Linden, Selma, Prattville, 
Fort Deposit, Hayneville, Wetumpka, Tallassee, Montgomery, 
Tuskegee, Union Springs, Phenix City, Troy, and Eufaula
323 AM CDT Wed Mar 14 2018

...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT THIS
MORNING...
...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM CDT
THURSDAY...

The National Weather Service in Birmingham has issued a Freeze
Warning, which is in effect from midnight tonight to 9 AM CDT
Thursday. A Frost Advisory remains in effect through 10 AM CDT 
this morning. The Freeze Watch is no longer in effect.

* TEMPERATURE...31 to 35 degrees this morning and then 28 to 33
  degrees by Thursday morning. 

* IMPACTS...cold temperatures could result in damaging or 
  killing crops and other sensitive vegetation. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Frost Advisory means that widespread frost is expected.
Sensitive outdoor plants may be killed if left uncovered.

A Freeze Warning means sub freezing temperatures are imminent or
highly likely. These conditions will kill crops and other
sensitive vegetation.

&&

$$

What forecasters said that day

The local office's own words before this frost advisory 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 frost advisory went out at Mar 13, 12:17 AM CDT, 3 hours 16 minutes earlier.

Area forecast discussion, Mar 13, 12:17 AM CDT, 3 hours 16 minutes before
Area Forecast Discussion
National Weather Service Birmingham AL
1217 AM CDT Tue Mar 13 2018

.UPDATE...
For 06Z Aviation.

&&

.SHORT TERM...

No changes to the current forecast. Surface low pressure moves
away from the area as high pressure builds in. This reduces the
gradient enough that the wind will subside. We have already seen
the winds beginning to decrease somewhat west, but since gust are
still occurring, will leave advisory for the entire area until
sunset.

These same winds will also subside overnight. Some light winds
still expected and the combination of the cold air advection and
lighter winds will allow temperatures to drop to near freezing
for large part of north central Alabama. Did not change the
configuration of the Freeze Warning overnight. Outside the warning
area, temperatures still into the 30s with some patchy frost.

Minor tweaks the remainder of the period with same extended issues
on this run.

75

Previous short-term discussion:Today and Tonight.

As of 3 am the cold front has almost exited the forecast area and
the best rainfall coverage has ended. We now shift our eyes to the
upper low that will begin to swing into the area this morning.
Overall colder and drier air will filter in behind the front. Most
of the wrap around moisture associated with the upper low, will
remain north of Central Alabama through the early morning. If a few
showers do move through the northern portion of the area, profiles
just off the surface will be cold enough to support a light
rain/snow shower. Chances are low and uncertainty high, and will
only carry slight chance to chance wording. Ground temperatures are
too warm for any accumulation, and no impacts from any light snow
showers/flurries are expected.

With the upper low swinging through, winds will pick up quite a bit
today, so a wind advisory will be issued to account for the winds of
20 to 30 mph and higher gusts. These winds will calm down quite
substantially this evening and the colder airmass will begin to
settle down into the area. At this point took the consensus of the
short term models and knocked a couple of degrees off of that for
the lows tonight.  This puts the northern half of the area generally
at or below freezing, thus a freeze warning will be issued. Further
south, temperatures will stay above freezing for most of the area
but will still be in the low to mid 30s. Dewpoints will remain above
30 in these areas so patchy frost is possible. So a Frost advisory
will be issued for the south as well. There could be a few spots in
the south that drop to 32 degrees but those will be more isolated
than across the north.

16

.LONG TERM...
Tuesday through Monday.

Seasonably chilly conditions will continue Tuesday and Wednesday
under deep layer northerly to northwesterly flow. A highly amplified
pattern will be present over the CONUS with one longwave trough
moving onshore along the West Coast and another longwave trough over
the eastern CONUS, with a ridge located over the Rockies/High
Plains. An upper low will drift eastward from the eastern Great
Lakes to the Northeast, while a 'nor'easter occludes near the
Canadian Maritimes and high pressure moves from the northern High
Plains to the Lower Mississippi Valley. Cold air advection will not
be quite as strong Tuesday as today, but highs will still remain in
the 50s. A shortwave moving down the back side of the trough will
bring a few mid-level clouds during the day on Tuesday and a
reinforcing shot of cold air for Tuesday night. There will still be
a bit of a pressure gradient over the area Tuesday night allowing
for some light northerly winds, but with clear skies and a very dry
air mass still think temperatures should cool efficiently (as they
did even with some gradient winds last Thursday morning) with cold
air advection also assisting. Therefore expect a freeze for all but
the most unsheltered locations, and the cooler northern and eastern
locations will have no trouble reaching the 20s. A freeze watch has
subsequently been issued for Tuesday night for all of Central
Alabama.

The brunt of the coldest air at 850mb will be east of the area, but
850 mb temperatures Wednesday morning will still be as cold as -8C
in the northeastern counties. This results in cooler high
temperatures for Wednesday with some upper 40s in the typically
cooler northeastern/eastern locations. The surface high will be
centered near the Alabama Gulf Coast Wednesday night. This along
with a clipper low over the Great Lakes causes the low-level wind
direction to become more westerly, but considering the placement
of the high and associated calmer winds radiational cooling
conditions will overall be the best on this night. A freeze watch
will likely be issued for Wednesday night in future updates.

A return to more typical spring weather will begin to occur on
Thursday. The western CONUS trough will move the central CONUS
ridge and eastern CONUS trough eastward. Southwest winds and
rising 500mb heights should allow temperatures to warm up nicely
into the 60s by Thursday afternoon. Milder conditions are expected
Thursday night with southwest winds and some high clouds, but the
typically cooler eastern locations could still reach the 30s for
lows with 40s elsewhere.

Details remain uncertain, but the pattern becomes more unsettled
by Friday. Uncertainty is due to varied handling of shortwaves
ejecting out of the western CONUS trough. A surface low is
expected to develop in the lee of the Colorado Front Range on
Thursday, causing a frontal boundary to sharpen as it extends
eastward across the Missouri and Ohio Valleys. This low and
associated shortwave aloft is expected to weaken as it moves
eastward but the ECMWF is slower to weaken it, which allows the
front to move closer to the area Friday through the weekend.
Meanwhile the GFS is weaker with this system and keeps the front
further north. This will determine rain chances and temperatures
Friday through the weekend. Starting off on Friday, an axis of
enhanced 850-700mb mean RH values combined with warm air advection
and increasing dew points should result in at least scattered
showers developing. The front will then serve as the main focus
for showers and thunderstorms Friday night through the weekend,
especially the further north you go. With some instability and
deep layer shear along with cool temperatures aloft, there may be
the potential for a few stronger storms over the weekend near the
front, but fairly weak low-level flow and lack of upper-level
forcing suggests nothing particularly organized at this time.

Models have been indicating that a low-amplitude trough and
associated surface low will move through the Central CONUS during
the Monday timeframe, but have shown variability from model-to-
model and run-to-run regarding timing and placement of this
feature, as well as lingering troughing over eastern Canada and a
potentially strengthening subtropical ridge near the Bahamas. This
system looks to potentially have more instability to work with
than previous systems, so we will keep an eye on the severe
potential as it gets closer. But right now it's too early to
speculate on any details based on the uncertainties with the
system itself and the system before it, and it remains just beyond
the 7-day HWO period.

32/Davis

&&

.AVIATION...
06Z TAF Discussion.

Overall VFR for the next 24 to 30 hours. Winds have calmed down
to less than 5 to 7 kts area wide. Northwesterly winds will
increase again after 15Z to around 10 kts with gusts up to 20 kts,
before calming back down after 00Z.

16

&&

.FIRE WEATHER...

Rain-free conditions are expected through Thursday. RH values will
fall each afternoon due to a dry air mass but remain above critical
levels. 20ft winds will be weaker the remainder of the week,
generally below 10 mph. No fog is expected for the next few days.
KBDI values remain very low due to recent rainfall and will
likely remain that way with the upcoming rains, so there are no
fire weather concerns.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     54  28  53  28  64 /   0   0   0   0   0
Anniston    55  28  54  28  65 /   0   0   0   0   0
Birmingham  56  31  55  31  67 /   0   0   0   0   0
Tuscaloosa  59  30  58  30  68 /   0   0   0   0   0
Calera      57  31  56  31  67 /   0   0   0   0   0
Auburn      57  32  55  31  65 /   0   0   0   0   0
Montgomery  60  33  59  31  69 /   0   0   0   0   0
Troy        59  33  58  31  68 /   0   0   0   0   0

&&

.BMX WATCHES/WARNINGS/ADVISORIES/...
Frost Advisory until 9 AM CDT this morning for the following
counties: Autauga...Barbour...Bibb...Bullock...Chilton...
Dallas...Elmore...Greene...Hale...Lee...Lowndes...Macon...
Marengo...Montgomery...Perry...Pickens...Pike...Russell...
Sumter...Tuscaloosa.

Freeze Watch from late tonight through Wednesday morning for the
following counties: Autauga...Barbour...Bibb...Blount...
Bullock...Calhoun...Chambers...Cherokee...Chilton...Clay...
Cleburne...Coosa...Dallas...Elmore...Etowah...Fayette...Greene...
Hale...Jefferson...Lamar...Lee...Lowndes...Macon...Marengo...
Marion...Montgomery...Perry...Pickens...Pike...Randolph...
Russell...Shelby...St. Clair...Sumter...Talladega...Tallapoosa...
Tuscaloosa...Walker...Winston.

Freeze Warning until 9 AM CDT this morning for the following
counties: Blount...Calhoun...Chambers...Cherokee...Clay...
Cleburne...Coosa...Etowah...Fayette...Jefferson...Lamar...
Marion...Randolph...Shelby...St. Clair...Talladega...
Tallapoosa...Walker...Winston.

&&
Hazardous weather outlook, Mar 12, 10:00 PM CDT, 5 hours 33 minutes before
Hazardous Weather Outlook
National Weather Service Birmingham AL
1000 PM CDT Mon Mar 12 2018

ALZ011>015-017>050-140600-
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-
1000 PM CDT Mon Mar 12 2018

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

.DAY ONE...Outlook through Tonight.

Temperatures will likely fall to 32 degrees or slightly lower for
areas along and north of a Fayette to Alabaster to Alexander City
line. Further south only isolated locations will approach 32 degrees.
Temperatures will rise above freezing by 9 AM Tuesday.

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

Low temperatures below freezing will be more widespread across all
of Central Alabama Wednesday and Thursday mornings with temperatures
falling into the upper 20s in some areas.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management is not
expected at this time.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 13, 3:33 AM CDTFreeze WatchBMXAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more24 hr
Mar 13, 3:33 AM CDTFreeze WarningBMXBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 18 more30 hr

Nearby

Frost Advisories in Alabama, 2018Every frost 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.