Alert archive / Florida / Areal Flood Advisories in 2021

Areal Flood Advisory 55, NWS Mobile, AL

June 21, 2021Okaloosa County, Santa Rosa County, Florida

NWS Mobile, AL issued this areal flood advisory at Jun 21, 2021, 11:58 PM CDT for Okaloosa County, Santa Rosa County, Florida. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jun 21, 2021, 11:58 PM CDT (04:58 UTC)
Expired: Jun 22, 2021, 5:00 AM CDT
In force: 5 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon

Counties Okaloosa County, FL, Santa Rosa County, FL

The radar

The Eglin Afb radar (KEVX), 85 km from the middle of the area, began a volume at 05:00 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 5.0 hours before the alert went out and 242 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: 82 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1077 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Mobile, AL wrote its last area forecast discussion before this areal flood advisory went out at Jun 21, 11:18 PM CDT, 40 minutes earlier.

Area forecast discussion, Jun 21, 11:18 PM CDT, 40 minutes before

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In the hours before

Special weather statement, Jun 21, 6:56 PM CDT, 5 hours 2 minutes before

Special Weather Statement
National Weather Service Mobile AL
656 PM CDT Mon Jun 21 2021

ALZ261>263-MSZ079-220045-
Baldwin Inland AL-Mobile Central AL-Mobile Inland AL-George MS-
656 PM CDT Mon Jun 21 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...MOBILE...WEST CENTRAL BALDWIN AND SOUTHEASTERN GEORGE
COUNTIES UNTIL 745 PM CDT...

At 656 PM CDT, the strong thunderstorms were located along a line
extending from 5 miles southeast of Lucedale to 8 miles west of
Tanner Williams to Hurley to 4 miles west of Big Point, and moving
east at 35 mph.

Wind gusts of 40 to 50 mph will be possible with these storms.

Locations impacted include...
Midtown Mobile, Downtown Mobile, Prichard, Tillmans Corner, Saraland,
Chickasaw, Satsuma, Creola, Chunchula, Gulfcrest, Axis, Semmes,
Tanner Williams, I65 And I165, Mobile Regional Airport, Wilmer, I65
And AL 158 and I10 And I65.

LAT...LON 3074 8841 3074 8860 3089 8865 3110 8806
      3089 8793 3079 8792 3080 8799 3069 8801
      3074 8803 3068 8803 3075 8804 3065 8803
      3058 8810 3062 8810 3058 8811 3053 8840
TIME...MOT...LOC 2356Z 255DEG 29KT 3085 8855 3076 8850 3064 8849 3057
8856

Black

Special weather statement, Jun 21, 10:11 PM CDT, 1 hour 47 minutes before

Special Weather Statement
National Weather Service Mobile AL
1011 PM CDT Mon Jun 21 2021

FLZ201>206-220400-
Okaloosa Inland FL-Escambia Inland FL-Okaloosa Coastal FL-
Santa Rosa Coastal FL-Escambia Coastal FL-Santa Rosa Inland FL-
1011 PM CDT Mon Jun 21 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...WESTERN OKALOOSA...SANTA ROSA AND CENTRAL ESCAMBIA
COUNTIES UNTIL 1100 PM CDT...

At 1010 PM CDT, the strong thunderstorms were located along a line
extending from 5 miles southeast of Jay to Point Baker to 4 miles
southwest of Warrington, and moving east at 30 mph.

Wind gusts up to around 40 mph will be possible with these storms.

Locations impacted include...
Ferry Pass, Brent, West Pensacola, Wright, Fort Walton Beach, Ensley,
Warrington, Pace, Milton, Goulding, Mary Esther, Century, Flomaton,
Bagdad, Ocean City, Myrtle Grove, Baker, Oriole Beach, Navarre and
Jay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3070 8724 3100 8727 3099 8659 3039 8658
      3032 8721 3041 8666 3036 8720 3044 8688
      3059 8701 3060 8702 3057 8700 3044 8709
      3058 8718 3032 8726 3032 8730 3031 8739
TIME...MOT...LOC 0310Z 267DEG 26KT 3090 8708 3067 8706 3033 8732

Special weather statement, Jun 21, 10:57 PM CDT, 1 hour 1 minute before

Special Weather Statement
National Weather Service Mobile AL
1057 PM CDT Mon Jun 21 2021

ALZ060-FLZ203>206-220500-
Covington AL-Okaloosa Inland FL-Okaloosa Coastal FL-
Santa Rosa Coastal FL-Santa Rosa Inland FL-
1057 PM CDT Mon Jun 21 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT THE FOLLOWING
COUNTIES...SOUTHERN COVINGTON...OKALOOSA AND EASTERN SANTA ROSA
COUNTIES UNTIL MIDNIGHT CDT...

At 1056 PM CDT, the strong thunderstorms were located along a line
extending from 12 miles west of Laurel Hill to 7 miles south of Baker
to 9 miles southeast of Pensacola Beach, and moving east at 30 mph.

Wind gusts around 40 mph will be possible with these storms.

Locations impacted include...
Wright, Fort Walton Beach, Crestview, Niceville, Eglin AFB,
Valparaiso, Mary Esther, Florala, Ocean City, Lake Lorraine, Baker,
Shalimar, Laurel Hill, Lockhart, Cinco Bayou and Navarre Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3100 8619 3099 8639 3045 8639 3045 8642
      3041 8645 3038 8640 3040 8651 3039 8652
      3038 8687 3039 8683 3041 8666 3040 8675
      3040 8690 3044 8689 3044 8688 3045 8689
      3100 8680 3100 8669 3120 8670 3120 8619
TIME...MOT...LOC 0356Z 258DEG 25KT 3102 8666 3069 8670 3024 8704

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 7:33 PM CDT	Areal Flood Advisory	MOB	Mobile	3 hr
Jun 21, 8:01 PM CDT	Flash Flood Warning	MOB	Mobile	104 min
Jun 21, 8:18 PM CDT	Flash Flood Watch	MOB	Baldwin, Mobile	17 hr
Jun 21, 10:09 PM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	5 hr
Jun 21, 10:32 PM CDT	Special Marine Warning	MOB		47 min
Jun 22, 2:34 AM CDT	Special Marine Warning	MOB		56 min
Jun 22, 3:20 AM CDT	Special Marine Warning	MOB		55 min
Jun 22, 3:40 AM CDT	Special Marine Warning	MOB		65 min
Jun 22, 7:09 AM CDT	Special Marine Warning	MOB		66 min
Jun 22, 8:28 AM CDT	Special Marine Warning	MOB		92 min
Jun 22, 9:48 AM CDT	River Flood Warning	MOB	Baldwin	25 hr
Jun 22, 9:50 AM CDT	River Flood Warning	MOB	Baldwin	49 hr
Jun 22, 9:57 AM CDT	Special Marine Warning	MOB		33 min
Jun 22, 10:16 AM CDT	Special Marine Warning	MOB		29 min
Jun 22, 1:42 PM CDT	Special Marine Warning	MOB		18 min
Jun 22, 1:48 PM CDT	Special Weather Statement	MOB	Baldwin	27 min
Jun 22, 2:00 PM CDT	Special Weather Statement	MOB	Mobile	30 min
Jun 22, 2:02 PM CDT	Special Marine Warning	MOB		28 min
Jun 22, 4:31 PM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
Jun 22, 5:13 PM CDT	Special Marine Warning	MOB		52 min
Jun 22, 5:21 PM CDT	Special Weather Statement	MOB	Baldwin	39 min
Jun 22, 5:37 PM CDT	Areal Flood Advisory	MOB	Baldwin, Mobile	3 hr
Jun 21, 10:11 PM CDT	Special Weather Statement	MOB	Okaloosa, Santa Rosa	49 min
Jun 21, 10:43 PM CDT	Areal Flood Advisory	MOB	Escambia, Santa Rosa	5 hr
Jun 21, 10:57 PM CDT	Special Weather Statement	MOB	Okaloosa	63 min
Jun 21, 11:15 PM CDT	Flash Flood Warning	MOB	Escambia, Santa Rosa	4 hr
Jun 22, 9:52 AM CDT	River Flood Warning	MOB	Okaloosa	12 hr
Jun 22, 2:30 PM CDT	Special Weather Statement	MOB	Escambia	45 min
Jun 22, 3:34 PM CDT	Special Weather Statement	MOB	Escambia	41 min
Jun 22, 4:38 PM CDT	Areal Flood Advisory	MOB	Escambia, Okaloosa, Santa Rosa	3 hr

Nearby

Areal Flood Advisories in Florida, 2021 Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.