Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 9, NWS Mobile, AL

April 3, 2017Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at Apr 3, 2017, 8:54 AM CDT for Baldwin County, Alabama. It was in force for 4 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: Apr 3, 2017, 8:54 AM CDT (13:54 UTC)
Expired: Apr 3, 2017, 1:00 PM CDT
In force: 4 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 41 km from the middle of the area, began a volume at 13:53 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 12:00Z, 1.9 hours before the alert went out and 189 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 555 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: -464 m²/s²
0-3 km storm-relative helicity: -530 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

521 
WGUS54 KMOB 031354
FFWMOB
ALC003-031800-
/O.NEW.KMOB.FF.W.0009.170403T1354Z-170403T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
854 AM CDT MON APR 3 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Baldwin County in southwestern Alabama...

* Until 100 PM CDT

* At 854 AM 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...
  Daphne, Fairhope, Bay Minette, Spanish Fort, Robertsdale, Point
  Clear, Loxley, Stockton, Stapleton, Summerdale, Silverhill and I65
  And AL 225.

Additional rainfall amounts of 2 to 3 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.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3065 8805 3081 8799 3080 8801 3081 8801
      3082 8797 3093 8796 3094 8795 3092 8796
      3095 8787 3103 8791 3102 8792 3102 8793
      3103 8793 3106 8791 3099 8760 3085 8763
      3067 8741 3063 8739 3052 8745 3035 8793

$$

1 follow-up statement

115 
WGUS74 KMOB 031600
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
1100 AM CDT MON APR 3 2017

ALC003-031610-
/O.CAN.KMOB.FF.W.0009.000000T0000Z-170403T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-
1100 AM CDT MON APR 3 2017

...THE FLASH FLOOD WARNING FOR BALDWIN COUNTY IS CANCELLED...

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

LAT...LON 3065 8805 3081 8799 3080 8801 3081 8801
      3082 8797 3093 8796 3094 8795 3092 8796
      3095 8787 3103 8791 3102 8792 3102 8793
      3103 8793 3106 8791 3099 8760 3085 8763
      3067 8741 3063 8739 3052 8745 3035 8793

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 3:29 AM CDT	Special Weather Statement	MOB	Choctaw	46 min
Apr 3, 3:41 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw	49 min
Apr 3, 5:10 AM CDT	Severe Thunderstorm Warning	MOB	Washington	50 min
Apr 3, 5:45 AM CDT	Severe Thunderstorm Warning	MOB	Choctaw, Clarke, Washington	45 min
Apr 3, 5:57 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Mobile, Washington	48 min
Apr 3, 6:28 AM CDT	Severe Thunderstorm Warning	MOB	Clarke, Washington	47 min
Apr 3, 6:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Clarke, Escambia, Mobile, Monroe, Washington	47 min
Apr 3, 6:53 AM CDT	Special Marine Warning	MOB		97 min
Apr 3, 7:26 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Butler, Clarke, Conecuh, Escambia, Mobile and 2 more	49 min
Apr 3, 7:27 AM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
Apr 3, 7:45 AM CDT	Special Weather Statement	MOB	Baldwin, Covington, Escambia	45 min
Apr 3, 7:53 AM CDT	Flash Flood Watch	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	4 hr
Apr 3, 7:55 AM CDT	Flash Flood Warning	MOB	Mobile	4 hr
Apr 3, 8:09 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Conecuh, Covington, Escambia, Mobile	51 min
Apr 3, 8:26 AM CDT	Special Marine Warning	MOB		94 min
Apr 3, 8:26 AM CDT	Severe Thunderstorm Warning	MOB	Butler, Conecuh, Covington, Crenshaw, Escambia	64 min
Apr 3, 8:49 AM CDT	Special Marine Warning	MOB		56 min
Apr 3, 8:54 AM CDT	Tornado Warning	MOB	Crenshaw	13 min
Apr 3, 8:59 AM CDT	Special Marine Warning	MOB		61 min
Apr 3, 9:00 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin, Escambia, Mobile	60 min
Apr 3, 9:33 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Apr 3, 9:33 AM CDT	Special Marine Warning	MOB		87 min
Apr 3, 9:36 AM CDT	Severe Thunderstorm Warning	MOB	Conecuh, Covington	39 min
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	8 days
Apr 3, 9:43 AM CDT	River Flood Warning	MOB	Choctaw, Clarke, Washington	9 days
Apr 3, 9:43 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	62 min
Apr 3, 10:02 AM CDT	Special Marine Warning	MOB		58 min
Apr 3, 10:46 AM CDT	Severe Thunderstorm Warning	MOB	Baldwin	45 min
Apr 3, 10:55 AM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 12:54 PM CDT	Special Marine Warning	MOB		66 min
Apr 3, 1:55 PM CDT	Special Marine Warning	MOB		2 hr
Apr 3, 3:51 PM CDT	Special Marine Warning	MOB		114 min
Apr 3, 5:38 PM CDT	Special Marine Warning	MOB		67 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.