Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Birmingham, AL

January 2, 20174 counties in Alabama

NWS Birmingham, AL issued this flash flood warning at Jan 2, 2017, 5:59 PM CST for 4 counties in Alabama. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jan 2, 2017, 5:59 PM CST (23:59 UTC)
Expired: Jan 2, 2017, 11:00 PM CST
In force: 5 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Elmore County, AL, Macon County, AL, Montgomery County, AL, Tallapoosa County, AL

The radar

The Maxwell AFB radar (KMXX), 15 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 108 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: 11 J/kg
Mixed-layer CIN: -162 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

979 
WGUS54 KBMX 022359
FFWBMX
ALC051-087-101-123-030300-
/O.NEW.KBMX.FF.W.0004.170102T2359Z-170103T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
559 PM CST MON JAN 2 2017

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Macon County in southeastern Alabama...
  Elmore County in east central Alabama...
  Northeastern Montgomery County in south central Alabama...
  Southwestern Tallapoosa County in east central Alabama...

* Until 900 PM CST

* At 558 PM CST, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected to
  begin shortly.

* Some locations that will experience flooding include...
  Northern Montgomery, Prattville, Millbrook, Tuskegee, Wetumpka,
  Tallassee, Notasulga, Milstead, Elmore, Coosada, Deatsville,
  Eclectic, Shorter, Franklin, Emerald Mountain, Kowaliga Bridge,
  Jordan Lake, Boylston, Waugh and Lagoon Park.

Additional rainfall amounts of 1 to 2 inches are possible in the
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3223 8585 3230 8590 3227 8590 3227 8598
      3225 8600 3234 8618 3242 8641 3275 8641
      3275 8634 3277 8634 3275 8632 3275 8601
      3278 8601 3277 8585 3268 8570 3258 8569
      3258 8566 3250 8549 3249 8544 3223 8543

$$

Owen

1 follow-up statement

714 
WGUS54 KBMX 030148
FFWBMX
ALC051-087-101-123-030500-
/O.EXT.KBMX.FF.W.0004.000000T0000Z-170103T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
748 PM CST MON JAN 2 2017

The National Weather Service in Birmingham has extended the

* Flash Flood Warning for...
  Macon County in southeastern Alabama...
  Elmore County in east central Alabama...
  Northeastern Montgomery County in south central Alabama...
  Southwestern Tallapoosa County in east central Alabama...

* Until 1100 PM CST

* At 747 PM CST, Doppler radar indicated heavy rain across the warned
  area. Flash flooding is already occurring.

* Some locations that will experience flooding include...
  Northern Montgomery, Prattville, Millbrook, Tuskegee, Wetumpka,
  Tallassee, Notasulga, Milstead, Elmore, Coosada, Deatsville,
  Eclectic, Shorter, Franklin, Emerald Mountain, Kowaliga Bridge,
  Jordan Lake, Boylston, Waugh and Lagoon Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3223 8585 3230 8590 3227 8590 3227 8598
      3225 8600 3234 8618 3242 8641 3275 8641
      3275 8634 3277 8634 3275 8632 3275 8601
      3278 8601 3277 8585 3268 8570 3258 8569
      3258 8566 3250 8549 3249 8544 3223 8543

$$

Owen

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 1, 7:11 PM CST	Dense Fog Advisory	BMX	Bibb, Blount, Calhoun, Cherokee, Cleburne, Etowah and 14 more	14 hr
Jan 2, 5:05 AM CST	Flash Flood Watch	BMX	Barbour, Bullock, Chambers, Lee, Lowndes, Macon and 3 more	19 hr
Jan 2, 7:00 AM CST	Severe Thunderstorm Warning	BMX	Greene, Sumter	21 min
Jan 2, 7:22 AM CST	Special Weather Statement	BMX	Greene	53 min
Jan 2, 8:04 AM CST	Special Weather Statement	BMX	Tuscaloosa	41 min
Jan 2, 8:48 AM CST	Special Weather Statement	BMX	Tuscaloosa	42 min
Jan 2, 9:04 AM CST	Special Weather Statement	BMX	Jefferson	41 min
Jan 2, 9:13 AM CST	Severe Thunderstorm Warning	BMX	Jefferson	30 min
Jan 2, 9:48 AM CST	Areal Flood Warning	BMX	Bibb, Blount, Chilton, Greene, Hale, Jefferson and 3 more	117 min
Jan 2, 9:48 AM CST	Special Weather Statement	BMX	Bibb	42 min
Jan 2, 10:02 AM CST	Special Weather Statement	BMX	Jefferson	43 min
Jan 2, 10:35 AM CST	Special Weather Statement	BMX	Chilton, Shelby	40 min
Jan 2, 11:07 AM CST	Special Weather Statement	BMX	Coosa, St. Clair, Talladega	38 min
Jan 2, 11:45 AM CST	Areal Flood Advisory	BMX	Bibb, Chilton, Hale, Jefferson, St. Clair, Shelby and 3 more	2 hr
Jan 2, 11:48 AM CST	Special Weather Statement	BMX	Calhoun, Clay, Talladega	42 min
Jan 2, 12:11 PM CST	Special Weather Statement	BMX	Marengo	49 min
Jan 2, 12:36 PM CST	Areal Flood Advisory	BMX	Calhoun, Chambers, Clay, Cleburne, Coosa, Randolph and 3 more	114 min
Jan 2, 1:09 PM CST	Areal Flood Advisory	BMX	Autauga, Bibb, Chilton, Coosa, Dallas, Elmore and 3 more	2 hr
Jan 2, 3:51 PM CST	Tornado Warning	BMX	Pike	34 min
Jan 2, 4:11 PM CST	Tornado Warning	BMX	Bullock	48 min
Jan 2, 5:24 PM CST	Flash Flood Warning	BMX	Autauga, Lowndes, Montgomery	6 hr
Jan 2, 5:27 PM CST	Flash Flood Warning	BMX	Bullock, Pike	6 hr
Jan 2, 5:56 PM CST	Flash Flood Warning	BMX	Barbour, Russell	5 hr

Nearby

Flash Flood Warnings in Alabama, 2017 Every flash flood warning 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.