Alert archive / Alabama / Flash Flood Watches in 2017

Flash Flood Watch 2, NWS Birmingham, AL

May 21, 201723 counties in Alabama

NWS Birmingham, AL issued this flash flood watch at May 21, 2017, 4:05 PM CDT for 23 counties in Alabama. It took effect at May 22, 2017, 1:00 PM CDT. It was in force for 26 hr.

The area

The counties it named.

The facts

Issued
May 21, 2017, 4:05 PM CDT (21:05 UTC)
In effect from
May 22, 2017, 1:00 PM CDT
Expired
May 23, 2017, 2:45 PM CDT
In force
26 hr
Issued by
NWS Birmingham, AL
Flood severity
None
All 23 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Sumter County, AL, Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 59 km from the middle of the area, began a volume at 21:07 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 12:00Z, 9.1 hours before the alert went out and 76 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 12:00Z on 2017-05-21Temperature 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 12:00Z on 2017-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.193958Sfc1 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
1195 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

261 
WGUS64 KBMX 212105
FFABMX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Birmingham AL
405 PM CDT Sun May 21 2017

...FLASH FLOODING POSSIBLE ACROSS SOUTH CENTRAL ALABAMA MONDAY
AFTERNOON THROUGH TUESDAY...

ALZ030>033-037>050-221200-
/O.NEW.KBMX.FF.A.0002.170522T1800Z-170524T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sumter-Greene-Hale-Perry-Tallapoosa-Chambers-Marengo-Dallas-
Autauga-Lowndes-Elmore-Montgomery-Macon-Bullock-Lee-Russell-Pike-
Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, 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
405 PM CDT Sun May 21 2017

...FLASH FLOOD WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH
TUESDAY EVENING...

The National Weather Service in Birmingham has issued a

* Flash Flood Watch for portions of central Alabama, east 
  central Alabama, southeast Alabama, and west central Alabama, 
  including the following areas, in central Alabama, Autauga, 
  Dallas, Elmore, Lowndes, Montgomery, and Perry. In east 
  central Alabama, Chambers, Lee, Macon, Russell, and 
  Tallapoosa. In southeast Alabama, Barbour, Bullock, and Pike. 
  In west central Alabama, Greene, Hale, Marengo, and Sumter. 

* From Monday afternoon through Tuesday evening

* In an area where 1.5 to 8 inches of rainfall has occurred over
  the past 24 hours, an additional 3 to 4 inches of rain is
  possible as several rounds of heavy rain moves through the area. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
7 follow-up statements
181 
WGUS64 KBMX 220830
FFABMX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Birmingham AL
330 AM CDT Mon May 22 2017

...FLASH FLOODING POSSIBLE ACROSS SOUTH CENTRAL ALABAMA MONDAY
AFTERNOON THROUGH TUESDAY EVENING...

ALZ028-029-034>036-221800-
/O.EXB.KBMX.FF.A.0002.170522T1800Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clay-Randolph-Bibb-Chilton-Coosa-
Including the cities of Ashland, Roanoke, Centreville, Clanton, 
and Rockford
330 AM CDT Mon May 22 2017

...FLASH FLOOD WATCH IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH TUESDAY EVENING...

The National Weather Service in Birmingham has expanded the

* Flash Flood Watch to include portions of central Alabama and 
  east central Alabama, including the following areas, in 
  central Alabama, Bibb, Chilton, and Coosa. In east central 
  Alabama, Clay and Randolph. 

* From 1 PM CDT this afternoon through Tuesday evening

* In an area where 1.5 to 8 inches of rainfall has occurred over 
  the past 24 hours, an additional 3 to 4 inches of rain is 
  possible as several rounds of heavy rain moves through the 
  area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

ALZ030>033-037>050-221800-
/O.EXT.KBMX.FF.A.0002.170522T1800Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sumter-Greene-Hale-Perry-Tallapoosa-Chambers-Marengo-Dallas-
Autauga-Lowndes-Elmore-Montgomery-Macon-Bullock-Lee-Russell-Pike-
Barbour-
Including the cities of Livingston, Eutaw, Greensboro, 
Moundville, Marion, 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
330 AM CDT Mon May 22 2017

...FLASH FLOOD WATCH NOW IN EFFECT FROM 1 PM CDT THIS AFTERNOON
THROUGH TUESDAY EVENING...

The Flash Flood Watch is now in effect for

* Portions of central Alabama, east central Alabama, southeast 
  Alabama, and west central Alabama, including the following 
  areas, in central Alabama, Autauga, Dallas, Elmore, Lowndes, 
  Montgomery, and Perry. In east central Alabama, Chambers, Lee, 
  Macon, Russell, and Tallapoosa. In southeast Alabama, Barbour, 
  Bullock, and Pike. In west central Alabama, Greene, Hale, 
  Marengo, and Sumter. 

* From 1 PM CDT this afternoon through Tuesday evening

* In an area where 1.5 to 8 inches of rainfall has occurred over 
  the past 24 hours, an additional 3 to 4 inches of rain is 
  possible as several rounds of heavy rain moves through the 
  area. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
640 
WGUS64 KBMX 221712
FFABMX

Flood Watch
National Weather Service Birmingham AL
1212 PM CDT Mon May 22 2017

...FLASH FLOODING POSSIBLE ACROSS SOUTH CENTRAL ALABAMA MONDAY
AFTERNOON THROUGH TUESDAY EVENING...

ALZ028>050-230500-
/O.CON.KBMX.FF.A.0002.170522T1800Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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 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
1212 PM CDT Mon May 22 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY EVENING...

The Flash Flood Watch continues for

* Portions of central Alabama, east central Alabama, southeast 
  Alabama, and west central Alabama, including the following 
  areas, in central Alabama, Autauga, Bibb, Chilton, Coosa, 
  Dallas, Elmore, Lowndes, Montgomery, and Perry. In east 
  central Alabama, Chambers, Clay, Lee, Macon, Randolph, 
  Russell, and Tallapoosa. In southeast Alabama, Barbour, 
  Bullock, and Pike. In west central Alabama, Greene, Hale, 
  Marengo, and Sumter. 

* Through Tuesday evening

* In an area where 1.5 to 8 inches of rainfall has occurred over
  the past 48 hours, an additional 2 to 4 inches of rain is 
  possible as several rounds of heavy rain moves through the area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

08
260 
WGUS64 KBMX 230430
FFABMX

Flood Watch
National Weather Service Birmingham AL
1130 PM CDT Mon May 22 2017

...FLASH FLOODING POSSIBLE ACROSS SOUTH CENTRAL ALABAMA THROUGH 
TUESDAY EVENING...

ALZ028>050-231600-
/O.CON.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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 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
1130 PM CDT Mon May 22 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY EVENING...

The Flash Flood Watch continues for

* Portions of central Alabama, east central Alabama, southeast 
  Alabama, and west central Alabama, including the following 
  areas, in central Alabama, Autauga, Bibb, Chilton, Coosa, 
  Dallas, Elmore, Lowndes, Montgomery, and Perry. In east 
  central Alabama, Chambers, Clay, Lee, Macon, Randolph, 
  Russell, and Tallapoosa. In southeast Alabama, Barbour, 
  Bullock, and Pike. In west central Alabama, Greene, Hale, 
  Marengo, and Sumter. 

* Through Tuesday evening

* In an area where 2 to 8 inches of rainfall has occurred over 
  the past 48 hours, an additional 2 to 4 inches of rain is 
  possible as several rounds of heavy rain moves through the area.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
169 
WGUS64 KBMX 231422
FFABMX

Flood Watch
National Weather Service Birmingham AL
922 AM CDT Tue May 23 2017

...FLASH FLOODING POSSIBLE ACROSS SOUTH CENTRAL ALABAMA THROUGH
THIS EVENING...

ALZ028>050-240300-
/O.CON.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
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 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
922 AM CDT Tue May 23 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH 10 PM CDT...

The Flash Flood Watch continues for

* Portions of central Alabama, east central Alabama, southeast 
  Alabama, and west central Alabama, including the following 
  areas, in central Alabama, Autauga, Bibb, Chilton, Coosa, 
  Dallas, Elmore, Lowndes, Montgomery, and Perry. In east 
  central Alabama, Chambers, Clay, Lee, Macon, Randolph, 
  Russell, and Tallapoosa. In southeast Alabama, Barbour, 
  Bullock, and Pike. In west central Alabama, Greene, Hale, 
  Marengo, and Sumter. 

* Through this evening.

* In an area where 2 to 8 inches of rainfall has occurred over the
  past few days, an additional 2 to 4 inches of rain is possible
  as several rounds of heavy rain moves through the area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

08
826 
WGUS64 KBMX 231553
FFABMX

Flood Watch
National Weather Service Birmingham AL
1053 AM CDT Tue May 23 2017

...FLASH FLOODING POSSIBLE ACROSS THE SOUTHEAST PORTIONS OF  
CENTRAL ALABAMA THROUGH THIS EVENING...

ALZ028-030>036-039>041-231700-
/O.CAN.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clay-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Marengo-Dallas-
Autauga-
Including the cities of Ashland, Livingston, Eutaw, Greensboro, 
Moundville, Marion, Centreville, Clanton, Rockford, Demopolis, 
Linden, Selma, and Prattville
1053 AM CDT Tue May 23 2017

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of Central Alabama as the rain
swath has moved out of the area. 

$$

ALZ029-037-038-042>050-240000-
/O.CON.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randolph-Tallapoosa-Chambers-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
Including the cities of Roanoke, Alexander City, Dadeville, 
Valley, Lanett, Lafayette, Fort Deposit, Hayneville, Wetumpka, 
Tallassee, Montgomery, Tuskegee, Union Springs, Auburn, Opelika, 
Phenix City, Troy, and Eufaula
1053 AM CDT Tue May 23 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

The Flash Flood Watch continues for

* Portions of central Alabama, east central Alabama, and 
  southeast Alabama, including the following areas, in central 
  Alabama, Elmore, Lowndes, and Montgomery. In east central 
  Alabama, Chambers, Lee, Macon, Randolph, Russell, and 
  Tallapoosa. In southeast Alabama, Barbour, Bullock, and Pike. 

* Until 10 PM CDT this evening

* In an area where 2 to 8 inches of rainfall has occurred over 
  the past few days, an additional 2 to 4 inches of rain is 
  possible as several rounds of heavy rain moves through the 
  area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

08
795 
WGUS64 KBMX 231830
FFABMX

Flood Watch
National Weather Service Birmingham AL
130 PM CDT Tue May 23 2017

...FLASH FLOODING POSSIBLE ACROSS THE SOUTHEAST PORTIONS OF
CENTRAL ALABAMA THROUGH THIS EVENING...

ALZ029-037-038-042>045-047-049-231930-
/O.CAN.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Randolph-Tallapoosa-Chambers-Lowndes-Elmore-Montgomery-Macon-Lee-
Pike-
Including the cities of Roanoke, Alexander City, Dadeville, 
Valley, Lanett, Lafayette, Fort Deposit, Hayneville, Wetumpka, 
Tallassee, Montgomery, Tuskegee, Auburn, Opelika, and Troy
130 PM CDT Tue May 23 2017

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of Central Alabama has been 
cancelled as the rain swath has moved out of the area. 

$$

ALZ046-048-050-240230-
/O.CON.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bullock-Russell-Barbour-
Including the cities of Union Springs, Phenix City, and Eufaula
130 PM CDT Tue May 23 2017

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM CDT THIS
EVENING...

The Flash Flood Watch continues for

* Portions of east central Alabama and southeast Alabama, 
  including the following areas, in east central Alabama, 
  Russell. In southeast Alabama, Barbour and Bullock. 

* Until 10 PM CDT this evening.

* In an area where 2 to 4 inches of rainfall has occurred over the
  past few days, additional rainfall continues that could cause 
  flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

08
812 
WGUS64 KBMX 231945
FFABMX

Flood Watch
National Weather Service Birmingham AL
245 PM CDT Tue May 23 2017

...FLASH FLOOD WATCH IS CANCELLED FOR ALL COUNTIES IN CENTRAL
ALABAMA...

ALZ046-048-050-232045-
/O.CAN.KBMX.FF.A.0002.000000T0000Z-170524T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bullock-Russell-Barbour-
Including the cities of Union Springs, Phenix City, and Eufaula
245 PM CDT Tue May 23 2017

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for the southeast portions of Central 
Alabama has been cancelled.

$$

08

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at May 21, 3:58 PM CDT, 7 minutes earlier.

Area forecast discussion, May 21, 3:58 PM CDT, 7 minutes before
Area Forecast Discussion
National Weather Service Birmingham AL
358 PM CDT Sun May 21 2017

.SHORT TERM...
Through Tonight.

A cold front is approaching northwest Central Alabama this
afternoon, and over the last 45 minutes have watched a broken
line of storms develop from near Iuka, MS southwestward to near
Jackson, MS where a line of storms has been pushing eastward for
several hours. This activity will continue to push across Central
Alabama tonight. Severe storms are not expected, but heavy
rainfall will be possible with any activity as PW values increase
to 1.60 inches or greater ahead of the front. Not all locations
will receive rainfall tonight, but will need to watch localized
areas for flooding given the saturated ground conditions.

This front will push south of the area tomorrow morning, stall,
and quickly advance back northward ahead of an approaching
shortwave Monday afternoon. Rain will spread back into the area
from the southwest Monday afternoon. The previous discussion
remains valid, as there is a large amount uncertainty regarding
the track of the shortwave and associated surface low. Global
models present a more northern solution than the higher res, near
term models, which have performed better with the recent active
pattern. Forecast PoPs and QPFs lean toward the higher res
guidance.

A Flash Flood Watch (FFA) has been issued for the southern tier
of counties in Central Alabama, generally along and south of the
US Highway 80/I-85 corridor. Sunday night, 8+ inches of rain fell
in locations around Montgomery. Over the next two days, an
additional 2 to 4 inches is possible across the south. If models
begin to trend northward with heavier rainfall, additional
counties to the north of the current watch area might need to be
added to the FFA.

14

.LONG TERM...
Monday through Saturday.

A fast moving, possibly convectively enhanced shortwave will move
through the Gulf Coast region through the base of an large and
anomalously deep trough amplifying over the central and eastern US
Monday and Tuesday. This may be accompanied by a surface low and
LLJ. Rain chances will begin to increase early Monday night as
isentropic lift develops ahead of this system, followed by a
potential MCS early Tuesday morning. There's still alot of
uncertainty regarding the timing and strength of this system. If
it tracks far enough inland, a threat for damaging winds and even
brief tornadoes could develop across parts of southern Central
Alabama south of the warm front. On the other hand, a track along
the coast would minimize surface-based instability further inland,
a scenario that often occurs. There's still too much uncertainty
due to the small size of the wave and mesoscale details to mention
anything in the HWO for severe but will mention the possibility of
flooding with the amount of rainfall that was received on Saturday.

Wednesday a more potent shortwave will round the base of the
anomalous trough and a cold front will move into the area. 0-6 km
bulk shear, upper- level forcing, and cooling aloft will all be
impressive for late May with this system. However, moisture
return will be very questionable behind Tuesday's system due to
low-level winds turning more northwesterly Tuesday night without
much of a southerly LLJ by Wednesday, so instability and
associated severe threat will be uncertain with dewpoints only in
the low 60s. The upper level forcing and front will be enough to
trigger a good chance of showers and embedded storms, also aided
by a -18C cold pool at 500 mb. Dry and refreshingly cooler
conditions will move in for Thursday. Although, we will moderate
back into the mid 80s by Saturday.

32/16

&&

.AVIATION...
18Z TAF Discussion.

Low strato-cu and high clouds currently affect terminals across the
area. Rainfall from Saturday night has kept the area stable and
mostly rain free today. An isolated shower and thunderstorm might
develop this afternoon, but chances at any terminal are too low to
mention.  Winds will remain out of the southwest at 7-9kts.

Ahead of an approaching cold front tonight, MVFR clouds and fog are
possible, mainly at ASN, ANB, MGM, and TOI. Scattered showers and
storms are also expected along the front, and have included a period
of VCTS at all terminals. Winds will shift to the northwest and then
northeast by early Monday morning. MVFR cigs are expected to linger
behind the cold front through at least mid morning.

14

&&

.FIRE WEATHER...

Isolated to scattered showers and storms are expected overnight as a
cold front moves through the area. Most of the area is expected to
be dry. This front will stall and several rounds of heavy rain and
storms are expected beginning Monday afternoon and continuing
through mid week. An another 3-4 inches of rainfall is possible
across southern portions of Central Alabama by Wednesday. Critical
fire weather conditions are not expected.

&&

.PRELIMINARY POINT TEMPS/POPS...
Gadsden     63  80  60  76  59 /  30  40  60  40  70
Anniston    66  80  61  77  61 /  30  40  70  50  70
Birmingham  65  81  62  77  62 /  40  50  60  50  70
Tuscaloosa  64  81  61  78  61 /  40  50  60  50  60
Calera      65  81  62  77  61 /  30  50  70  60  60
Auburn      67  80  64  75  63 /  40  50  80  70  50
Montgomery  68  83  65  78  64 /  40  80  80  70  50
Troy        67  84  65  76  64 /  40  80  80  70  50

&&

.BMX WATCHES/WARNINGS/ADVISORIES/...
Flash Flood Watch from Monday afternoon through Tuesday evening
for the following counties: Autauga...Barbour...Bullock...
Chambers...Dallas...Elmore...Greene...Hale...Lee...Lowndes...
Macon...Marengo...Montgomery...Perry...Pike...Russell...Sumter...
Tallapoosa.

&&
Hazardous weather outlook, May 21, 3:50 PM CDT, 15 minutes before
Hazardous Weather Outlook
National Weather Service Birmingham AL
350 PM CDT Sun May 21 2017

ALZ011>015-017>050-230000-
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-
350 PM CDT Sun May 21 2017

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

.DAY ONE...This Afternoon and Tonight.

Minor river flooding is possible along the Catoma Creek in
Montgomery county late tonight. Any additional rain over this basin
tonight would increase the potential for flooding.

Otherwise, additional hazardous weather is not expected at this
time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Locally heavy rainfall will be possible with a system moving along
the Gulf Coast Monday afternoon into Tuesday. Rainfall amounts of
two to four inches over saturated soils will result in the potential
for flash flooding, mainly across the southern half of Central
Alabama.

Minor river flooding may continue into Monday afternoon along the
Catoma Creek in Montgomery county. Any additional rain over this
basin would increase the potential for flooding.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management may be needed
Monday afternoon through Tuesday.

In the hours before

Local storm report, May 21, 3:50 PM CDT, 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
350 PM CDT SUN MAY 21 2017

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

0730 PM     TSTM WND DMG     TALLASSEE               32.54N 85.90W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            SEVERAL TREES WERE BLOWN DOWN IN THE AREA.
            SOME LOCATIONS INCLUDE ECLECTIC, ELMORE,
            FRIENDSHIP, MILLBROOK, RED HILL, SANTUCK,
            AND WETUMPKA. WINDS WERE ESTIMATED AROUND 60
            MPH.

&&

MAL
Local storm report, May 21, 3:55 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
355 PM CDT SUN MAY 21 2017

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

1000 PM     FLASH FLOOD      2 WSW WETUMPKA MUNI AIR 32.52N 86.36W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            A FEW ROADS WERE FLOODED AND IMPASSABLE IN
            MILLBROOK. THESE INCLUDE COUNTRY PLACE
            DRIVE, TURTLE PLACE DRIVE AND HIGHWAY 14,
            AND DOGWOOD CIRCLE AND PINELEAF DRIVE.

&&

MAL
Local storm report, May 21, 3:56 PM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
356 PM CDT SUN MAY 21 2017

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

1000 PM     FLASH FLOOD      1 SSW WETUMPKA          32.52N 86.21W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            HIGHWAY 231 NEAR THE WINN DIXIE WAS FLOODED
            AND IMPASSABLE.

&&

MAL
Local storm report, May 21, 3:58 PM CDT, 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
358 PM CDT SUN MAY 21 2017

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

1000 PM     FLASH FLOOD      1 NNW EMERALD MOUNTAIN  32.47N 86.11W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            A FEW ROADS WERE FLOODED AND IMPASSABLE.
            THESE INCLUDE DOGWOOD MEADOWS DRIVE AT MT
            MEADOWS LANE WHERE VEHICLE STRANDED IN HIGH
            WATER, AND RIFLE RANGE ROAD AND LAPRADE
            DRIVE.

&&

MAL
Local storm report, May 21, 4:01 PM CDT, 4 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BIRMINGHAM AL
401 PM CDT SUN MAY 21 2017

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

0415 PM     LIGHTNING        1 S ROCK CREEK          33.47N 87.08W
05/20/2017                   JEFFERSON          AL   PUBLIC

            LIGHTNING STRUCK A HOME IN THE WILLOW BEND
            SUBDIVISION. THE HOME BURNT DOWN AND NO
            INJURIES WERE REPORTED.

0500 PM     TSTM WND DMG     WEST JEFFERSON          33.64N 87.06W
05/20/2017                   JEFFERSON          AL   EMERGENCY MNGR

            SEVERAL TREES DOWN IN DIFFERENT LOCATIONS IN
            WESTERN JEFFERSON COUNTY. WINDS WERE
            ESTIMATED AROUND 50 MPH.

0530 PM     TSTM WND DMG     3 NW GAYLESVILLE        34.30N 85.60W
05/20/2017                   CHEROKEE           AL   PUBLIC

            A FEW TREES WERE BLOWN DOWN ALONG CR 114.
            WINDS WERE ESTIMATED AROUND 45 MPH.

0555 PM     LIGHTNING        1 SW ALABASTER          33.23N 86.83W
05/20/2017                   SHELBY             AL   PUBLIC

            A HOME WAS STRUCK BY LIGHTNING AND SUSTAINED
            ROOF DAMAGE.

0641 PM     LIGHTNING        3 NE BALL FLAT          34.05N 85.69W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            TWO SHEDS WERE STRUCK BY LIGHTNING AND HAVE
            BURNED DOWN.

0700 PM     FLASH FLOOD      1 ENE KINGSTON          33.54N 86.75W
05/20/2017                   JEFFERSON          AL   BROADCAST MEDIA

            SEVERAL WATER RESCUES WERE BEING PERFORMED
            BY THE BIRMINGHAM FIRE DEPARTMENT ALONG 1ST
            AVENUE NORTH.

0700 PM     FLASH FLOOD      1 NE GAYLESVILLE        34.28N 85.55W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            WATER WAS COMING INTO THE BACK DOOR OF A
            HOME NEAR GAYLESVILLE.

0700 PM     FLASH FLOOD      1 ENE KINGSTON          33.54N 86.75W
05/20/2017                   JEFFERSON          AL   TRAINED SPOTTER

            MULTIPLE WATER RESCUES ONGOING ALONG 1ST AVE
            N.

0705 PM     TSTM WND DMG     3 SSW REELTOWN          32.56N 85.82W
05/20/2017                   TALLAPOOSA         AL   PUBLIC

            SEVERAL TREES WERE BLOWN DOWN AROUND
            TALLASSEE. WINDS WERE ESTIMATED AROUND 60
            MPH.

0708 PM     FLASH FLOOD      CEDAR BLUFF             34.23N 85.60W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            BOUNDARY AVENUE IS COMPLETELY UNDERWATER AND
            IS IMPASSABLE. PARK STREET IS ALSO
            IMPASSABLE AND CLOSED.

0710 PM     TSTM WND DMG     2 SW REELTOWN           32.58N 85.83W
05/20/2017                   TALLAPOOSA         AL   PUBLIC

            SEVERAL TREES WERE BLOWN DOWN ALONG COBB
            ROAD IN REELTOWN. WINDS WERE ESTIMATED
            BETWEEN 50 AND 60 MPH.

0730 PM     TSTM WND DMG     TALLASSEE               32.54N 85.90W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            SEVERAL TREES WERE BLOWN DOWN IN THE AREA.
            SOME LOCATIONS INCLUDE ECLECTIC, ELMORE,
            FRIENDSHIP, MILLBROOK, RED HILL, SANTUCK,
            AND WETUMPKA. WINDS WERE ESTIMATED AROUND 60
            MPH.

0751 PM     FLASH FLOOD      CEDAR BLUFF             34.22N 85.60W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            LAWRENCE STREET IN CEDAR BLUFF HAS OVER TWO
            FEET OF WATER OVER IT. IT HAS BEEN
            BARRICADED AND CLOSED.

0800 PM     LIGHTNING        1 WNW BOOTH             32.51N 86.58W
05/20/2017                   AUTAUGA            AL   EMERGENCY MNGR

            WATER RUNNING OVER THE ROADWAY AND IS
            IMPASSABLE.

0811 PM     FLASH FLOOD      1 ENE CEDAR BLUFF       34.22N 85.59W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            CR 535 AT CR 75 IS FLOODED AND IMPASSABLE.
            THE ROAD HAS AT LEAST A FOOT OF WATER OVER
            IT AND HAS BEEN BARRICADED AND CLOSED.

0822 PM     FLASH FLOOD      1 NW CALHOUN            32.06N 86.55W
05/20/2017                   LOWNDES            AL   911 CALL CENTER

            COUNTY ROAD 33 UNDERWATER NEAR CALHOUN.

0900 PM     TSTM WND DMG     WEDOWEE                 33.31N 85.49W
05/20/2017                   RANDOLPH           AL   EMERGENCY MNGR

            SEVERAL TREES DOWN IN SEVERAL DIFFERENT
            LOCATIONS AROUND WEDOWEE. WINDS WERE
            ESTIMATED AROUND 50 MPH.

0923 PM     FLASH FLOOD      2 WNW BOYLSTON          32.44N 86.31W
05/20/2017                   MONTGOMERY         AL   PUBLIC

            CAR SUBMERGED IN WATER NEAR COLISEUM BLVD.

0930 PM     FLASH FLOOD      2 NE ALABAMA STATE UNIV 32.38N 86.27W
05/20/2017                   MONTGOMERY         AL   BROADCAST MEDIA

            ROADS ARE FLOODED AROUND FOREST PARK DRIVE.
            SEVERAL CARS WERE FLOODED.

0945 PM     FLASH FLOOD      2 SW CAPITOL HILL GOLF  32.43N 86.41W
05/20/2017                   AUTAUGA            AL   911 CALL CENTER

            FLOODING REPORTED NEAR THE COOTERS POND
            AREA.

0953 PM     FLASH FLOOD      1 SSW MONTGOMERY        32.36N 86.31W
05/20/2017                   MONTGOMERY         AL   PUBLIC

            THE INTERSECTIONS ALONG PERRY STREET WERE
            FLOODED UP TO THE FLOORBOARDS ON VEHICLES.

1000 PM     FLASH FLOOD      2 WSW WETUMPKA MUNI AIR 32.52N 86.36W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            A FEW ROADS WERE FLOODED AND IMPASSABLE IN
            MILLBROOK. THESE INCLUDE COUNTRY PLACE
            DRIVE, TURTLE PLACE DRIVE AND HIGHWAY 14,
            AND DOGWOOD CIRCLE AND PINELEAF DRIVE.

1000 PM     FLASH FLOOD      1 SSW WETUMPKA          32.52N 86.21W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            HIGHWAY 231 NEAR THE WINN DIXIE WAS FLOODED
            AND IMPASSABLE.

1000 PM     FLASH FLOOD      1 NNW EMERALD MOUNTAIN  32.47N 86.11W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            A FEW ROADS WERE FLOODED AND IMPASSABLE.
            THESE INCLUDE DOGWOOD MEADOWS DRIVE AT MT
            MEADOWS LANE WHERE VEHICLE STRANDED IN HIGH
            WATER, AND RIFLE RANGE ROAD AND LAPRADE
            DRIVE.

1006 PM     FLASH FLOOD      2 SSE MONTGOMERY COUNTR 32.33N 86.27W
05/20/2017                   MONTGOMERY         AL   BROADCAST MEDIA

            SEVERAL VEHICLES UNDER WATER AROUND THE
            CAMBRIDGE PARK APARTMENTS NEAR HIGHWAY 80
            AND WOODLEY ROAD.

1013 PM     TSTM WND DMG     1 WNW TALLASSEE         32.54N 85.90W
05/20/2017                   ELMORE             AL   EMERGENCY MNGR

            SEVERAL TREES DOWN IN THE AREA. SOME OF THE
            LOCATIONS INCLUDE CLAUDE FLEAHOP ROAD,
            MULLINS ROAD, HIGHWAY 14, CHEROKEE TRAILS,
            MURPHY ROAD, WELDON ROAD, AND HOGAN ROAD.
            WINDS WERE ESTIMATED AROUND 60 MPH.

1026 PM     FLASH FLOOD      1 NNW CEDAR BLUFF       34.23N 85.60W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            SEVERAL ROADS STILL IMPASSABLE AND CLOSED
            FROM FLOOD WATERS.

1029 PM     FLASH FLOOD      1 W BALL FLAT           34.02N 85.74W
05/20/2017                   CHEROKEE           AL   EMERGENCY MNGR

            CR 24 IS BEING BARRICADED AS WATER HAS COME
            OVER A BRIDGE AND MADE THE ROAD IMPASSABLE.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
May 20, 7:11 PM CDTSpecial Weather StatementBMXElmore34 min
May 20, 7:18 PM CDTFlash Flood WarningBMXCherokee3 hr
May 20, 7:31 PM CDTSpecial Weather StatementBMXCoosa, Tallapoosa29 min
May 20, 7:45 PM CDTFlash Flood WarningBMXChilton, Jefferson, Shelby, Talladega3 hr
May 20, 7:51 PM CDTFlash Flood WarningBMXAutauga, Dallas, Elmore, Lowndes, Montgomery3 hr
May 20, 8:24 PM CDTAreal Flood AdvisoryBMXCalhoun, Etowah, St. Clair, Talladega3 hr
May 20, 8:26 PM CDTSpecial Weather StatementBMXCleburne64 min
May 20, 8:29 PM CDTRiver Flood WarningBMXJefferson14 hr
May 20, 9:00 PM CDTFlash Flood WarningBMXElmore, Montgomery3 hr
May 20, 9:21 PM CDTSpecial Weather StatementBMXLowndes24 min
May 20, 9:45 PM CDTSpecial Weather StatementBMXPike60 min
May 20, 10:17 PM CDTSpecial Weather StatementBMXBullock58 min
May 20, 10:23 PM CDTFlash Flood WarningBMXCherokee3 hr
May 20, 10:35 PM CDTFlash Flood WarningBMXAutauga, Dallas, Elmore, Lowndes, Montgomery6 hr
May 20, 11:04 PM CDTSpecial Weather StatementBMXMacon41 min
May 20, 11:13 PM CDTSpecial Weather StatementBMXLee32 min
May 20, 11:40 PM CDTAreal Flood AdvisoryBMXMacon, Tallapoosa3 hr
May 20, 11:44 PM CDTSpecial Weather StatementBMXLee, Russell61 min
May 21, 12:01 AM CDTFlash Flood WarningBMXMacon3 hr
May 21, 12:03 AM CDTSpecial Weather StatementBMXBarbour42 min
May 21, 12:30 AM CDTAreal Flood AdvisoryBMXLee3 hr
May 21, 12:33 AM CDTSpecial Weather StatementBMXChambers, Lee57 min
May 21, 1:14 AM CDTSpecial Weather StatementBMXChambers46 min
May 21, 1:40 AM CDTAreal Flood AdvisoryBMXRandolph3 hr
May 21, 4:25 AM CDTAreal Flood WarningBMXLowndes, Montgomery3 hr
May 21, 6:55 AM CDTRiver Flood WarningBMXMontgomery48 hr
May 21, 6:17 PM CDTSpecial Weather StatementBMXLamar, Marion43 min

Nearby

Flash Flood Watches in Alabama, 2017Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.