Alert archive / Florida / Flash Flood Warnings in 2017

Flash Flood Warning 93, NWS Mobile, AL

October 28, 2017Escambia County, Florida; Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at Oct 28, 2017, 1:52 AM CDT for Escambia County, Florida; Baldwin County, Alabama. It was in force for 3 hr. 1 report 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: Oct 28, 2017, 1:52 AM CDT (06:52 UTC)
Expired: Oct 28, 2017, 4:45 AM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

Counties Baldwin County, AL, Escambia County, FL

The radar

The Mobile radar (KMOB), 85 km from the middle of the area, began a volume at 06:54 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
Oct 28, 2:30 AM CDT	FLASH FLOOD	4 Ne Elberta, AL	Water flowing over the road at the intersection of County Road 95 and Woerner Road.

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, 6.9 hours before the alert went out and 222 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: 153 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1013 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

824 
WGUS54 KMOB 280652
FFWMOB
ALC003-FLC033-280945-
/O.NEW.KMOB.FF.W.0093.171028T0652Z-171028T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
152 AM CDT SAT OCT 28 2017

The National Weather Service in Mobile has issued a

* Flash Flood Warning for...
  Southeastern Baldwin County in southwestern Alabama...
  South central Escambia County in northwestern Florida...

* Until 445 AM CDT

* At 151 AM 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...
  Ensley, Orange Beach, Lillian, Myrtle Grove and Perdido Beach. 

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.

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

&&

LAT...LON 3054 8727 3032 8730 3028 8761 3052 8755

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 27, 10:44 PM CDT	Areal Flood Advisory	MOB	Escambia	3 hr
Oct 28, 12:26 AM CDT	Special Weather Statement	MOB	Santa Rosa	49 min
Oct 28, 12:55 AM CDT	Special Weather Statement	MOB	Escambia, Santa Rosa	65 min
Oct 28, 1:42 AM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	3 hr
Oct 28, 2:10 AM CDT	Special Weather Statement	MOB	Escambia	50 min
Oct 27, 11:01 PM CDT	Flash Flood Warning	MOB	Baldwin	6 hr
Oct 27, 11:37 PM CDT	Special Marine Warning	MOB		53 min
Oct 28, 12:28 AM CDT	Special Marine Warning	MOB		62 min
Oct 28, 12:53 AM CDT	Special Marine Warning	MOB		52 min
Oct 28, 2:06 AM CDT	Special Marine Warning	MOB		54 min
Oct 28, 2:42 AM CDT	Special Marine Warning	MOB		93 min
Oct 28, 2:58 AM CDT	Special Marine Warning	MOB		92 min
Oct 28, 5:06 AM CDT	Small Craft Advisory	MOB		34 hr
Oct 28, 3:57 PM CDT	Frost Advisory	MOB	Choctaw	16 hr

Nearby

Flash Flood Warnings in Florida, 2017 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.