Alert archive / Alabama / Flash Flood Warnings in 2017

Flash Flood Warning 76, NWS Mobile, AL

October 7, 20176 counties in Alabama; Escambia County, Florida; Greene County, Wayne County, Mississippi

NWS Mobile, AL issued this flash flood warning at Oct 7, 2017, 11:01 PM CDT for 6 counties in Alabama; Escambia County, Florida; Greene County, Wayne County, Mississippi. 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: Oct 7, 2017, 11:01 PM CDT (04:01 UTC)
Expired: Oct 8, 2017, 5:00 AM CDT
In force: 6 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Clarke County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Greene County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 45 km from the middle of the area, began a volume at 04:04 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, 4.0 hours before the alert went out and 169 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: 601 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -81 m²/s²
0-3 km storm-relative helicity: -6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

368 
WGUS54 KMOB 080401
FFWMOB
ALC003-025-053-097-099-129-FLC033-MSC041-153-081000-
/O.NEW.KMOB.FF.W.0076.171008T0401Z-171008T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
1101 PM CDT SAT OCT 7 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southwestern Monroe County in south central Alabama...
  Northern Mobile County in southwestern Alabama...
  Northwestern Baldwin County in southwestern Alabama...
  Washington County in southwestern Alabama...
  South central Clarke County in southwestern Alabama...
  Southwestern Escambia County in south central Alabama...
  Northwestern Escambia County in northwestern Florida...
  Southeastern Wayne County in southeastern Mississippi...
  Northeastern Greene County in southeastern Mississippi...

* Until 500 AM CDT

* At 1100 PM CDT, Doppler radar indicated bands of thunderstorms 
  producing heavy rain streaming north 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...
  Saraland, Bay Minette, Satsuma, Citronelle, Creola, Chatom,
  Leakesville, Chunchula, Stockton, Wagarville, Gulfcrest, Deer Park,
  Axis, Tibbie, Calvert, Mount Vernon, State Line, Semmes, Fruitdale
  and McIntosh.

Additional rainfall amounts of two 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.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3074 8841 3114 8844 3112 8864 3144 8867
      3150 8824 3136 8771 3087 8748 3082 8797

$$

1 follow-up statement

747 
WGUS74 KMOB 080622
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
122 AM CDT SUN OCT 8 2017

ALC003-025-053-097-099-129-FLC033-MSC041-153-081000-
/O.CON.KMOB.FF.W.0076.000000T0000Z-171008T1000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monroe AL-Mobile AL-Baldwin AL-Washington AL-Clarke AL-Escambia AL-
Escambia FL-Wayne MS-Greene MS-
122 AM CDT SUN OCT 8 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CDT FOR
SOUTHWESTERN MONROE...NORTHERN MOBILE...NORTHWESTERN BALDWIN...
WASHINGTON...SOUTH CENTRAL CLARKE...SOUTHWESTERN ESCAMBIA...
NORTHWESTERN ESCAMBIA...SOUTHEASTERN WAYNE AND NORTHEASTERN GREENE
COUNTIES...

At 121 AM CDT, Doppler radar indicated a broad area of rain with 
embedded 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...
Saraland, Bay Minette, Satsuma, Citronelle, Creola, Chatom,
Leakesville, Chunchula, Stockton, Wagarville, Gulfcrest, Deer Park,
Axis, Tibbie, Calvert, Mount Vernon, State Line, Semmes, Fruitdale
and McIntosh.

Additional rainfall amounts of two 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.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3074 8841 3114 8844 3112 8864 3144 8867
      3150 8824 3136 8771 3087 8748 3082 8797

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 7, 7:23 PM CDT	Special Marine Warning	MOB		67 min
Oct 7, 7:28 PM CDT	Tornado Warning	MOB	Baldwin, Mobile, Washington	47 min
Oct 7, 7:28 PM CDT	Tornado Warning	MOB	Baldwin, Mobile	32 min
Oct 7, 7:33 PM CDT	Special Marine Warning	MOB		57 min
Oct 7, 8:11 PM CDT	Tornado Warning	MOB	Washington	20 min
Oct 7, 8:21 PM CDT	Special Marine Warning	MOB		54 min
Oct 7, 9:13 PM CDT	Tornado Warning	MOB	Baldwin	32 min
Oct 7, 9:18 PM CDT	Special Marine Warning	MOB		57 min
Oct 7, 9:27 PM CDT	Tornado Warning	MOB	Baldwin	48 min
Oct 7, 9:43 PM CDT	Tornado Warning	MOB	Baldwin	32 min
Oct 7, 9:52 PM CDT	Flash Flood Warning	MOB	Baldwin	6 hr
Oct 7, 10:39 PM CDT	Special Marine Warning	MOB		36 min
Oct 7, 11:46 PM CDT	Flash Flood Warning	MOB	Baldwin, Conecuh, Escambia, Monroe	6 hr
Oct 8, 1:31 AM CDT	Flash Flood Warning	MOB	Choctaw, Clarke, Conecuh, Monroe, Washington, Wilcox	6 hr
Oct 8, 2:06 AM CDT	Flash Flood Warning	MOB	Conecuh, Covington, Escambia	7 hr
Oct 8, 2:53 AM CDT	Flash Flood Warning	MOB	Butler, Conecuh, Covington, Monroe, Wilcox	6 hr
Oct 8, 3:41 AM CDT	Areal Flood Warning	MOB	Baldwin	6 hr
Oct 8, 3:51 AM CDT	Areal Flood Warning	MOB	Mobile	6 hr
Oct 8, 4:46 AM CDT	Flash Flood Warning	MOB	Butler, Wilcox	4 hr
Oct 8, 4:58 AM CDT	Areal Flood Warning	MOB	Baldwin, Clarke, Escambia, Mobile, Monroe, Washington	6 hr
Oct 8, 5:37 AM CDT	Areal Flood Warning	MOB	Baldwin, Conecuh, Escambia, Monroe	6 hr
Oct 8, 6:15 AM CDT	Flash Flood Warning	MOB	Butler, Covington, Crenshaw	3 hr
Oct 8, 7:20 AM CDT	Areal Flood Warning	MOB	Choctaw, Clarke, Conecuh, Monroe, Washington, Wilcox	6 hr
Oct 8, 8:13 AM CDT	Small Craft Advisory	MOB		17 hr
Oct 8, 10:14 AM CDT	River Flood Warning	MOB	Covington, Escambia	63 hr
Oct 8, 10:19 AM CDT	River Flood Warning	MOB	Mobile	11 hr
Oct 8, 10:20 AM CDT	High Surf Advisory	MOB	Baldwin, Mobile	21 hr
Oct 8, 11:09 AM CDT	Areal Flood Warning	MOB	Butler, Conecuh, Covington, Escambia	6 hr
Oct 8, 12:58 AM CDT	Tornado Warning	MOB	Okaloosa	32 min
Oct 8, 1:18 AM CDT	Tornado Warning	MOB	Okaloosa	27 min
Oct 8, 10:06 AM CDT	River Flood Warning	MOB	Okaloosa	45 hr
Oct 7, 9:56 PM CDT	Flash Flood Warning	MOB	George, Greene, Perry, Stone	6 hr
Oct 8, 1:43 AM CDT	River Flood Warning	MOB	George, Greene, Wayne	64 hr

Nearby

Flash Flood Warnings in Alabama, 2017 Flash Flood Warnings in Mississippi, 2017 Flash Flood Warnings in Florida, 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.