Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 21, NWS Mobile, AL

June 6, 2017Mobile County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 6, 2017, 8:05 PM CDT for Mobile County, Alabama. It was in force for 6 hr. 3 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: Jun 6, 2017, 8:05 PM CDT (01:05 UTC)
Expired: Jun 7, 2017, 2:00 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Mobile County, AL

The radar

The Mobile radar (KMOB), 19 km from the middle of the area, began a volume at 01:08 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
Jun 6, 8:37 PM CDT	FLASH FLOOD	1 Nw I10 And Mcdonald R, AL	WATER OVER ROADWAY NEAR OLD PASCAGOULA RD JUST WEST OF MCDONALD ROAD VIA SOCIAL MEDIA.
Jun 6, 8:37 PM CDT	FLASH FLOOD	Wnw Hollingers Island, AL	WATER OVER ROADWAY ON ISLAND ROAD JUST EAST OF RANGELINE ROAD. VIA SOCIAL MEDIA.
Jun 6, 9:10 PM CDT	FLASH FLOOD	1 S St Elmo, AL	VEHICLE STALLED IN HIGH WATER ON ARGYLE RD JUST SOUTH OF TOM WALLER RD. VIA SOCIAL MEDIA.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.1 hours before the alert went out and 141 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: 418 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 704 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

297 
WGUS54 KMOB 070105
FFWMOB
ALC097-070700-
/O.NEW.KMOB.FF.W.0021.170607T0105Z-170607T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
805 PM CDT TUE JUN 6 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Mobile County in southwestern Alabama...

* Until 200 AM CDT

* At 804 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Midtown Mobile, Downtown Mobile, Tillmans Corner, Theodore, Grand
  Bay, Bayou La Batre, Coden, Mobile Regional Airport and I10 And
  I65.

Additional rainfall amounts of one to three 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.

&&

LAT...LON 3040 8840 3069 8841 3072 8804 3036 8806

$$

1 follow-up statement

165 
WGUS74 KMOB 070650
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
150 AM CDT WED JUN 7 2017

ALC097-070700-
/O.EXP.KMOB.FF.W.0021.000000T0000Z-170607T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mobile AL-
150 AM CDT WED JUN 7 2017

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN MOBILE COUNTY WILL EXPIRE
AT 200 AM CDT...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.

LAT...LON 3040 8840 3069 8841 3072 8804 3036 8806

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 7:23 PM CDT	Flash Flood Warning	MOB	Clarke, Washington	6 hr
Jun 6, 8:21 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jun 6, 8:33 PM CDT	Special Marine Warning	MOB		117 min
Jun 6, 8:44 PM CDT	Flash Flood Warning	MOB	Baldwin, Escambia	6 hr
Jun 6, 9:27 PM CDT	Special Marine Warning	MOB		63 min
Jun 7, 12:48 AM CDT	River Flood Warning	MOB	Baldwin	24 hr
Jun 7, 1:08 AM CDT	Hydrologic Warning	MOB	Baldwin	32 hr
Jun 7, 9:48 AM CDT	Small Craft Advisory	MOB		5 hr
Jun 7, 11:40 AM CDT	River Flood Warning	MOB	Baldwin	21 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.