Alert archive / Alabama / Flash Flood Warnings in 2021

Flash Flood Warning 40, NWS Mobile, AL

July 7, 2021Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at Jul 7, 2021, 1:36 AM CDT for 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: Jul 7, 2021, 1:36 AM CDT (06:36 UTC)
Expired: Jul 7, 2021, 4:26 AM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon
Flood severity: None

County Baldwin County, AL

The radar

The Mobile radar (KMOB), 77 km from the middle of the area, began a volume at 06:38 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
Jul 7, 3:10 AM CDT	FLASH FLOOD	Foley, AL	FOLEY POLICE DEPARTMENT WATER COVERING ROADWAY AT THE INTERSECTION OF HWY 98 AND PINE ST.

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, 6.6 hours before the alert went out and 211 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: 1996 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 636 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 66 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

819 
WGUS54 KMOB 070636
FFWMOB
ALC003-071245-
/O.NEW.KMOB.FF.W.0040.210707T0636Z-210707T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mobile AL
136 AM CDT Wed Jul 7 2021

The National Weather Service in Mobile has issued a

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

* Until 745 AM CDT Wednesday.

* At 136 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Foley, Orange Beach, Lillian, Magnolia Springs, Bon Secour, 
  Summerdale, Perdido Beach, Elberta, Miflin, Josephine, Elsanor, 
  Seminole, Marlow, Perdido Heights, Paradise Beach, River Park and 
  Turkey Branch.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3045 8786 3059 8746 3051 8745 3051 8744
      3040 8742 3039 8743 3037 8743 3037 8744
      3035 8743 3036 8742 3035 8741 3032 8744
      3032 8742 3031 8748 3026 8776

FLASH FLOOD...RADAR INDICATED

$$

1 follow-up statement

710 
WGUS74 KMOB 070926
FFSMOB

Flash Flood Statement
National Weather Service Mobile AL
426 AM CDT Wed Jul 7 2021

ALC003-070936-
/O.CAN.KMOB.FF.W.0040.000000T0000Z-210707T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Baldwin AL-
426 AM CDT Wed Jul 7 2021

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

The heavy rain has ended. Flooding is no longer expected to pose a 
threat.

LAT...LON 3045 8786 3059 8746 3051 8745 3051 8744
      3040 8742 3039 8743 3037 8743 3037 8744
      3035 8743 3036 8742 3035 8741 3032 8744
      3032 8742 3031 8748 3026 8776

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 10:55 PM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jul 7, 7:14 AM CDT	Areal Flood Advisory	MOB	Baldwin	3 hr
Jul 7, 5:04 PM CDT	Areal Flood Advisory	MOB	Covington, Crenshaw	3 hr

Nearby

Flash Flood Warnings in Alabama, 2021 Every flash flood warning in 2021

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.