Alert archive / Florida / Areal Flood Advisories in 2021

Areal Flood Advisory 281, NWS Mobile, AL

October 7, 2021Okaloosa County, Florida

NWS Mobile, AL issued this areal flood advisory at Oct 7, 2021, 3:10 AM CDT for Okaloosa County, Florida. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Oct 7, 2021, 3:10 AM CDT (08:10 UTC)
Expired: Oct 7, 2021, 6:15 AM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Okaloosa County, FL

The radar

The Eglin Afb radar (KEVX), 65 km from the middle of the area, began a volume at 08:13 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, 8.2 hours before the alert went out and 221 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: 111 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 837 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Oct 6, 6:35 PM CDT, 8 hours 35 minutes earlier.

Area forecast discussion, Oct 6, 6:35 PM CDT, 8 hours 35 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 7:51 PM CDT	Dense Fog Advisory	MOB	Baldwin, Choctaw, Clarke, Mobile, Monroe, Washington and 1 more	14 hr
Oct 7, 6:21 AM CDT	Marine Dense Fog Advisory	MOB		3 hr
Oct 6, 9:50 PM CDT	River Flood Warning	MOB	Okaloosa, Santa Rosa	49 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.