Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 28, NWS Birmingham, AL

August 10, 2017Pike County, Alabama

NWS Birmingham, AL issued this flash flood warning at Aug 10, 2017, 5:10 PM CDT for Pike County, Alabama. It was in force for 4 hr. 12 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, 5:10 PM CDT (22:10 UTC)
Expired: Aug 10, 2017, 9:15 PM CDT
In force: 4 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Flood severity: None

County Pike County, AL

The radar

The Ft Rucker radar (KEOX), 69 km from the middle of the area, began a volume at 22:11 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, 5:30 PM CDT	FLASH FLOOD	1 Ene Troy Country Club, AL	WATER COVERING 3 LANES OF ELBA HWY (HWY 87) WITH ONE VEHICLE STRANDED.
Aug 10, 5:30 PM CDT	FLASH FLOOD	Troy Country Club, AL	WATER COVERING 3 LANES OF ELBA HWY (HWY 87) WITH ONE VEHICLE STRANDED.
Aug 10, 5:40 PM CDT	FLASH FLOOD	1 Se Troy Country Club, AL	SPRADLEY DRIVE BARRICADED DUE TO FLOODING.
Aug 10, 5:40 PM CDT	FLASH FLOOD	Troy Country Club, AL	SPRADLEY DRIVE BARRICADED DUE TO FLOODING.
Aug 10, 5:45 PM CDT	FLASH FLOOD	1 Sse Troy University, AL	WATER COVERING GEORGE WALLACE DR NEAR 2ND AVE.
Aug 10, 5:53 PM CDT	HEAVY RAIN 3.31	Troy Muni Airport, AL	TROY MUNICIPAL AIRPORT OBSERVED 3.31 INCHES OF RAIN FROM 420 PM TO 553 PM.
Aug 10, 6:10 PM CDT	FLASH FLOOD	4 S Antioch, AL	CR 3319 AT WHITEWATER CREEK IS IMPASSABLE DUE TO FLOODING.
Aug 10, 6:20 PM CDT	FLASH FLOOD	1 Nne Troy University, AL	WATER COVERING ELM ST NEAR CHARLES HENDERSON MIDDLE SCHOOL.
Aug 10, 6:20 PM CDT	FLASH FLOOD	1 Nnw Troy Country Club, AL	WATER COVERING SANDERS RD NEAR HWY 231.
Aug 10, 6:20 PM CDT	FLASH FLOOD	1 S Troy, AL	PORTION OF W MADISON ST BETWEEN S 3 NOTCH ST AND MADISON AVE IMPASSABLE DUE TO FLOODING.
Aug 10, 6:20 PM CDT	FLASH FLOOD	Troy, AL	PORTION OF W MADISON ST BETWEEN S 3 NOTCH ST AND MADISON AVE IMPASSABLE DUE TO FLOODING.
Aug 10, 7:30 PM CDT	FLASH FLOOD	Troy, AL	WATER STILL COVERING SEVERAL ROADS IN/AROUND TROY. SOME STILL IMPASSABLE.

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, 10.2 hours before the alert went out and 166 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.

099 
WGUS54 KBMX 102210
FFWBMX
ALC109-110015-
/O.NEW.KBMX.FF.W.0028.170810T2210Z-170811T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Birmingham has issued a

* Flash Flood Warning for...
  Pike County in southeastern Alabama...

* Until 715 PM CDT

* At 509 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Troy, Brundidge, Banks, Antioch, Linwood, Ansley, Troy Municipal
  Airport, Troy University, Tennille, Hamilton Crossroads, Orion,
  Tarentum, Brundidge Municipal Airport and Mossy Grove.

Additional rainfall amounts of one inch is possible in
the warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3178 8615 3179 8615 3179 8616 3182 8620
      3183 8618 3185 8619 3189 8617 3197 8619
      3197 8600 3198 8599 3197 8588 3163 8573
      3162 8575 3162 8596

$$

19

1 follow-up statement

953 
WGUS54 KBMX 110011
FFWBMX
ALC109-110215-
/O.EXT.KBMX.FF.W.0028.000000T0000Z-170811T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Birmingham has extended the

* Flash Flood Warning for...
  Pike County in southeastern Alabama...

* Until 915 PM CDT

* At 709 PM CDT, emergency management reported flash flooding still 
  ongoing across portions of the warned area. Three inches of rain 
  have already fallen in many areas, with localized higher amounts. 
  Several roadways are still considered impassable at this time.

* Some locations that will experience flooding include...
  Troy, Brundidge, Banks, Antioch, Linwood, Ansley, Troy Municipal
  Airport, Troy University, Tennille, Hamilton Crossroads, Orion,
  Tarentum, Brundidge Municipal Airport and Mossy Grove.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3178 8615 3179 8615 3179 8616 3182 8620
      3183 8618 3185 8619 3189 8617 3197 8619
      3197 8600 3198 8599 3197 8588 3163 8573
      3162 8575 3162 8596

$$

19

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, 5:47 PM CDT	Areal Flood Advisory	BMX	Autauga, Dallas, Lowndes, Montgomery	118 min
Aug 10, 6:17 PM CDT	Flash Flood Warning	BMX	Autauga, Lowndes, Montgomery	5 hr
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.