Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 47, NWS Mobile, AL

June 22, 2017Washington County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 22, 2017, 10:12 PM CDT for 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, 10:12 PM CDT (03:12 UTC)
Expired: Jun 23, 2017, 4:15 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Washington County, AL

The radar

The Mobile radar (KMOB), 76 km from the middle of the area, began a volume at 03:12 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, 3.2 hours before the alert went out and 205 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.

720 
WGUS54 KMOB 230312
FFWMOB
ALC129-230915-
/O.NEW.KMOB.FF.W.0047.170623T0312Z-170623T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1012 PM CDT THU JUN 22 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Eastern Washington County in southwestern Alabama...

* Until 415 AM CDT Friday

* At 1011 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is expected.

* Some locations that will experience flooding include...
  Jackson, Wagarville, Leroy, Calvert and McIntosh. 

Additional rainfall amounts of 2 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 3149 8790 3144 8793 3142 8791 3141 8793
      3138 8789 3136 8789 3131 8793 3131 8796
      3129 8795 3127 8795 3126 8799 3123 8793
      3121 8795 3116 8794 3117 8799 3114 8802
      3114 8813 3158 8804

$$

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, 7:32 PM CDT	Flash Flood Warning	MOB	Mobile, Washington	6 hr
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, 10:49 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.