Alert archive / Alabama / Flash Flood Warnings in 2018

Flash Flood Warning 5, NWS Mobile, AL

April 14, 2018Clarke County, Washington County, Alabama

NWS Mobile, AL issued this flash flood warning at Apr 14, 2018, 3:46 PM CDT for Clarke County, Washington County, Alabama. It was in force for 6 hr. 6 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: Apr 14, 2018, 3:46 PM CDT (20:46 UTC)
Expired: Apr 14, 2018, 9:45 PM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Clarke County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 128 km from the middle of the area, began a volume at 20:45 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
Apr 14, 6:04 PM CDT	FLASH FLOOD	5 Wnw Fulton, AL	COUNTY EM REPORTS WATER OVER THE ROADWAY ON CHILTON ROAD AT SALITPA CREEK JUST SOUTH OF HWY 154
Apr 14, 6:48 PM CDT	FLASH FLOOD	Tibbie, AL	COUNTY EM REPORTS WATER OVER MULTIPLE ROADS ACROSS THE COUNTY BY ESPECIALLY ON HIGHWAY 17 NEAR TIBBIE AND COUNTY ROAD 8 NEAR DEER PARK
Apr 14, 7:19 PM CDT	HEAVY RAIN 5.94	Thomasville, AL	PERSONAL WEATHER STATION IN THOMASVILLE REPORTS A STORM TOTAL OF 5.94 INCHES
Apr 14, 7:50 PM CDT	FLASH FLOOD	3 Ssw Thomasville, AL	COUNTY EM REPORTED WATER OVER DUMMY LINE ROAD.
Apr 14, 9:08 PM CDT	FLASH FLOOD	Thomasville, AL	BUTLER DRIVE IN THOMASVILLE IS CLOSED AND HAS WATER AS DEEP AS 4 FEET OVER THE ROADWAY.
Apr 14, 9:22 PM CDT	FLASH FLOOD	5 Sw Grove Hill, AL	WATER RESCUE ONGOING AT HARRISON LANE AND HEBRON ROAD IN CLARKE COUNTY WITH ENTRAPPED VEHICLE OCCUPANTS

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, 8.8 hours before the alert went out and 193 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: 224 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 275 m²/s²
0-3 km storm-relative helicity: 324 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.7

Open this sounding in Storm Lab

The text

As transmitted.

142 
WGUS54 KMOB 142046
FFWMOB
ALC025-129-150245-
/O.NEW.KMOB.FF.W.0005.180414T2046Z-180415T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
346 PM CDT SAT APR 14 2018

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Central Washington County in southwestern Alabama...
  Northwestern Clarke County in southwestern Alabama...

* Until 945 PM CDT.

* At 346 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to three inches of rain 
  have already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Jackson, Thomasville, Saint Stephens, Wagarville, Leroy, Tibbie and
  Coffeeville.

LAT...LON 3199 8769 3144 8793 3128 8835 3157 8813
      3169 8813 3170 8809 3176 8810 3176 8814
      3191 8812 3193 8805 3194 8807 3193 8808
      3194 8812 3196 8810 3195 8808 3196 8807
      3199 8807

$$

1 follow-up statement

281 
WGUS74 KMOB 142344
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
644 PM CDT SAT APR 14 2018

ALC025-129-150245-
/O.CON.KMOB.FF.W.0005.000000T0000Z-180415T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washington AL-Clarke AL-
644 PM CDT SAT APR 14 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
CENTRAL WASHINGTON AND NORTHWESTERN CLARKE COUNTIES...

At 641 PM CDT, Doppler radar indicates that showers and 
thunderstorms with heavy rain continue to move across much of the 
warned area.  Radar rainfall estimates show that 2.5 to 6 inches of 
rain has fallen over the area. Flash flooding remains likely as 
additional thunderstorms move across the area through the mid 
evening hours.

Some locations that will experience flooding include...
Jackson, Thomasville, Saint Stephens, Wagarville, Leroy, Tibbie and
Coffeeville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3199 8769 3144 8793 3128 8835 3157 8813
      3169 8813 3170 8809 3176 8810 3176 8814
      3191 8812 3193 8805 3194 8807 3193 8808
      3194 8812 3196 8810 3195 8808 3196 8807
      3199 8807

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 3:19 AM CDT	Wind Advisory	MOB	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more	18 hr
Apr 14, 4:09 AM CDT	Gale Warning	MOB		18 hr
Apr 14, 4:09 AM CDT	Small Craft Advisory	MOB		63 hr
Apr 14, 11:59 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	61 min
Apr 14, 1:07 PM CDT	Special Weather Statement	MOB	Choctaw	53 min
Apr 14, 2:00 PM CDT	Areal Flood Advisory	MOB	Choctaw, Clarke, Washington	3 hr
Apr 14, 2:35 PM CDT	Flash Flood Warning	MOB	Choctaw, Washington	6 hr
Apr 14, 4:53 PM CDT	Flash Flood Warning	MOB	Washington	6 hr
Apr 14, 5:34 PM CDT	Areal Flood Advisory	MOB	Clarke, Washington, Wilcox	3 hr
Apr 14, 6:14 PM CDT	Flash Flood Warning	MOB	Clarke, Washington, Wilcox	6 hr
Apr 14, 6:57 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	20 min

Nearby

Flash Flood Warnings in Alabama, 2018 Every flash flood warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.