Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 29, NWS Birmingham, AL

August 10, 2017Autauga County, Lowndes County, Montgomery County, Alabama

NWS Birmingham, AL issued this flash flood warning at Aug 10, 2017, 6:17 PM CDT for Autauga County, Lowndes County, Montgomery County, Alabama. It was in force for 5 hr. 7 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: Aug 10, 2017, 6:17 PM CDT (23:17 UTC)
Expired: Aug 10, 2017, 11:15 PM CDT
In force: 5 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

Counties Autauga County, AL, Lowndes County, AL, Montgomery County, AL

The radar

The Maxwell AFB radar (KMXX), 73 km from the middle of the area, began a volume at 23:19 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
Aug 10, 6:30 PM CDT	FLASH FLOOD	Hope Hull, AL	SEVERAL ROADS FLOODED JUST OFF INTERSTATE 65 EXIT 164 AROUND THE FAIRFIELD INN. TIME ESTIMATED.
Aug 10, 6:45 PM CDT	FLASH FLOOD	1 N Alabama State Unive, AL	NUMEROUS ROADS FLOODED WITHIN MONTGOMERY CITY LIMITS. INCLUDES NOREMAC RD/LOCH HAVEN DR, FOREST PARK, 3400-3600 BLOCK OF ATLANTA HWY, BAINBRIDE ST, GUNTER PARK DR W, GREENRIDGE, CHARLES AVE, 600 BLOCK OF EASTERN BLVD, COLISEUM BLVD.
Aug 10, 6:45 PM CDT	FLASH FLOOD	Alabama State Universit, AL	NUMEROUS ROADS FLOODED WITHIN MONTGOMERY CITY LIMITS. INCLUDES NOREMAC RD/LOCH HAVEN DR, FOREST PARK, 3400-3600 BLOCK OF ATLANTA HWY, BAINBRIDE ST, GUNTER PARK DR W, GREENRIDGE, CHARLES AVE, 600 BLOCK OF EASTERN BLVD, COLISEUM BLVD.
Aug 10, 6:48 PM CDT	FLASH FLOOD	1 Ese Hunter, AL	WATER COVERING PORTION OF WASHINGTON FERRY RD.
Aug 10, 6:53 PM CDT	HEAVY RAIN 5.01	Dannelly Field, AL	MONTGOMERY REGIONAL AIRPORT OBSERVED 5.01 INCHES OF RAIN FROM 531 PM TO 653 PM.
Aug 10, 6:53 PM CDT	HEAVY RAIN 5.01	Dannelly Field, AL	MONTGOMERY REGIONAL AIRPORT OBSERVED 5.01 INCHES OF RAIN FROM 531 PM TO 653 PM.
Aug 10, 7:40 PM CDT	FLASH FLOOD	2 Sse Cantelous, AL	FLOODING NEAR INTERSECTION OF MITCHELL YOUNG RD AND US HWY 80.

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

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.3 hours before the alert went out and 89 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: 833 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 709 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

As transmitted.

426 
WGUS54 KBMX 102317
FFWBMX
ALC001-085-101-110115-
/O.NEW.KBMX.FF.W.0029.170810T2317Z-170811T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
617 PM CDT THU AUG 10 2017

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Southern Autauga County in central Alabama...
  Northeastern Lowndes County in south central Alabama...
  Western Montgomery County in south central Alabama...

* Until 815 PM CDT

* At 616 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Ont to two inches of rain will 
  fall in a short period of time, with additional rain of another 
  inch of so possible. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Montgomery, Prattville, Pike Road, Autaugaville, White Hall,
  Lowndesboro, Hyundai Motors Of Alabama, Auburn University In
  Montgomery, Autauga County Airport, Woodcrest, Maxwell Air Force
  Base, Snowdoun, Cantelous, Pintlala, Hunter, Mulberry, Alabama
  State University, Hope Hull, Dannelly Field and Eastdale Mall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3205 8628 3240 8684 3242 8685 3243 8683
      3244 8687 3246 8686 3254 8691 3258 8690
      3255 8670 3246 8664 3243 8641 3241 8641
      3241 8640 3243 8640 3243 8638 3242 8632
      3241 8631 3242 8630 3239 8608

$$

75

1 follow-up statement

269 
WGUS54 KBMX 110108
FFWBMX
ALC001-085-101-110415-
/O.EXT.KBMX.FF.W.0029.000000T0000Z-170811T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Birmingham AL
808 PM CDT THU AUG 10 2017

The National Weather Service in Birmingham has extended the

* Flash Flood Warning for...
  Southern Autauga County in central Alabama...
  Northeastern Lowndes County in south central Alabama...
  Western Montgomery County in south central Alabama...

* Until 1115 PM CDT

* At 807 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is already
  occurring and many roads are flooded.

* Some locations that will experience flooding include...
  Montgomery, Prattville, Pike Road, Autaugaville, White Hall,
  Lowndesboro, Hyundai Motors Of Alabama, Auburn University In
  Montgomery, Autauga County Airport, Woodcrest, Maxwell Air Force
  Base, Snowdoun, Cantelous, Pintlala, Hunter, Mulberry, Alabama
  State University, Hope Hull, Dannelly Field and Eastdale Mall.

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 3205 8628 3240 8684 3242 8685 3243 8683
      3244 8687 3246 8686 3254 8691 3258 8690
      3255 8670 3246 8664 3243 8641 3241 8641
      3241 8640 3243 8640 3243 8638 3242 8632
      3241 8631 3242 8630 3239 8608

$$

75

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 10, 7:05 AM CDT	Dense Fog Advisory	BMX	Dallas, Greene, Hale, Lowndes, Marengo, Perry and 2 more	115 min
Aug 10, 4:33 PM CDT	Special Weather Statement	BMX	Pike	42 min
Aug 10, 4:57 PM CDT	Flash Flood Warning	BMX	Autauga, Elmore, Montgomery	2 hr
Aug 10, 5:03 PM CDT	Areal Flood Advisory	BMX	Dallas, Lowndes	117 min
Aug 10, 5:10 PM CDT	Flash Flood Warning	BMX	Pike	4 hr
Aug 10, 5:47 PM CDT	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes, Montgomery	118 min
Aug 10, 6:48 PM CDT	Special Weather Statement	BMX	St. Clair	27 min
Aug 10, 6:56 PM CDT	Severe Thunderstorm Warning	BMX	Blount, St. Clair	34 min

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