Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 45, NWS Mobile, AL

June 22, 2017Mobile County, Washington County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 22, 2017, 7:32 PM CDT for Mobile County, Washington County, Alabama. It was in force for 6 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: Jun 22, 2017, 7:32 PM CDT (00:32 UTC)
Expired: Jun 23, 2017, 1:30 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Mobile County, AL, Washington County, AL

The radar

The Mobile radar (KMOB), 83 km from the middle of the area, began a volume at 00:34 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.5 hours before the alert went out and 197 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: 1330 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 787 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

550 
WGUS54 KMOB 230032
FFWMOB
ALC097-129-230630-
/O.NEW.KMOB.FF.W.0045.170623T0032Z-170623T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
732 PM CDT THU JUN 22 2017

The National Weather Service in Mobile has issued a

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

* Until 130 AM CDT

* At 731 PM CDT, 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...
  Citronelle, Chatom, Saint Stephens, Wagarville, Deer Park and
  Tibbie.

Additional rainfall amounts of 2.0 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 3161 8808 3159 8807 3158 8804 3157 8804
      3151 8798 3101 8819 3101 8842 3113 8843
      3163 8825

$$

1 follow-up statement

370 
WGUS74 KMOB 230626
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
126 AM CDT FRI JUN 23 2017

ALC097-129-230633-
/O.EXP.KMOB.FF.W.0045.000000T0000Z-170623T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mobile AL-Washington AL-
126 AM CDT FRI JUN 23 2017

...THE FLASH FLOOD WARNING FOR NORTHWESTERN MOBILE AND CENTRAL
WASHINGTON COUNTIES WILL EXPIRE AT 130 AM CDT...

Heavy rainfall will be moving out of the warned area within the 
hour. While localized urban flooding or inundation of low lying 
areas may continue, the threat of flash flooding will be ending as 
heavy rainfall comes to an end. 

LAT...LON 3161 8808 3159 8807 3158 8804 3157 8804
      3151 8798 3101 8819 3101 8842 3113 8843
      3163 8825

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 7:17 PM CDT	Special Weather Statement	MOB	Choctaw, Clarke, Mobile, Washington	88 min
Jun 22, 8:47 PM CDT	Special Weather Statement	MOB	Choctaw, Clarke, Washington	88 min
Jun 22, 10:00 PM CDT	Flash Flood Warning	MOB	Clarke	6 hr
Jun 22, 10:12 PM CDT	Flash Flood Warning	MOB	Washington	6 hr
Jun 22, 10:49 PM CDT	Special Weather Statement	MOB	Choctaw, Clarke, Washington, Wilcox	86 min
Jun 22, 11:25 PM CDT	Flash Flood Warning	MOB	Mobile	6 hr
Jun 22, 11:37 PM CDT	River Flood Warning	MOB	Dallas, Monroe, Wilcox	5 days
Jun 22, 11:37 PM CDT	River Flood Warning	MOB	Clarke, Monroe, Wilcox	7 days
Jun 23, 1:32 AM CDT	Areal Flood Advisory	MOB	Mobile, Washington	3 hr
Jun 23, 4:35 AM CDT	Flash Flood Watch	MOB	Clarke	34 hr
Jun 23, 5:05 AM CDT	Coastal Flood Warning	MOB	Baldwin, Mobile	13 hr
Jun 23, 3:28 PM CDT	Special Weather Statement	MOB	Choctaw	47 min
Jun 23, 3:57 PM CDT	Flash Flood Warning	MOB	Choctaw	6 hr
Jun 23, 4:16 PM CDT	Special Weather Statement	MOB	Choctaw	44 min
Jun 23, 4:58 PM CDT	Special Weather Statement	MOB	Choctaw, Clarke, Wilcox	47 min
Jun 23, 5:26 PM CDT	Flash Flood Warning	MOB	Choctaw, Clarke, Washington	6 hr
Jun 23, 5:56 PM CDT	Special Weather Statement	MOB	Clarke, Wilcox	94 min
Jun 23, 6:00 PM CDT	Special Weather Statement	MOB	Washington	45 min
Jun 23, 6:56 PM CDT	Special Weather Statement	MOB	Washington	49 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.