Alert archive / Tennessee / Areal Flood Advisories in 2021

Areal Flood Advisory 65, NWS Nashville, TN

July 26, 2021Davidson County, Rutherford County, Williamson County, Tennessee

NWS Nashville, TN issued this areal flood advisory at Jul 26, 2021, 10:57 AM CDT for Davidson County, Rutherford County, Williamson County, Tennessee. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jul 26, 2021, 10:57 AM CDT (15:57 UTC)
Expired: Jul 26, 2021, 1:00 PM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Davidson County, TN, Rutherford County, TN, Williamson County, TN

The radar

The Nashville radar (KOHX), 33 km from the middle of the area, began a volume at 15:56 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

Nashville Metro, TN (KBNA), launched 12:00Z, 4.0 hours before the alert went out and 20 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: 1186 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 939 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 0 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

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 Nashville, TN wrote its last area forecast discussion before this areal flood advisory went out at Jul 26, 6:30 AM CDT, 4 hours 27 minutes earlier.

Area forecast discussion, Jul 26, 6:30 AM CDT, 4 hours 27 minutes before

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Hazardous weather outlook, Jul 26, 5:02 AM CDT, 5 hours 55 minutes before

Hazardous Weather Outlook
National Weather Service Nashville TN
502 AM CDT Mon Jul 26 2021

TNZ005>011-023>034-056>066-075-077>080-093>095-271000-
Stewart-Montgomery-Robertson-Sumner-Macon-Clay-Pickett-Houston-
Humphreys-Dickson-Cheatham-Davidson-Wilson-Trousdale-Smith-Jackson-
Putnam-Overton-Fentress-Perry-Hickman-Lewis-Williamson-Maury-
Marshall-Rutherford-Cannon-De Kalb-White-Cumberland-Bedford-Coffee-
Warren-Grundy-Van Buren-Wayne-Lawrence-Giles-
502 AM CDT Mon Jul 26 2021

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

A few of the stronger thunderstorms this afternoon could bring heavy
downpours resulting in minor localized flooding.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

No hazardous weather is expected at this time.

JB Wright

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 26, 12:16 PM CDT	Special Weather Statement	OHX	Marshall	44 min
Jul 26, 12:34 PM CDT	Areal Flood Advisory	OHX	Lawrence, Wayne	116 min
Jul 26, 1:20 PM CDT	Special Weather Statement	OHX	Bedford	25 min
Jul 26, 3:38 PM CDT	Special Weather Statement	OHX	Smith	52 min
Jul 26, 4:26 PM CDT	Special Weather Statement	OHX	Cumberland	34 min
Jul 26, 4:55 PM CDT	Areal Flood Advisory	OHX	Cumberland	2 hr
Jul 26, 5:11 PM CDT	Special Weather Statement	OHX	Cumberland	34 min
Jul 26, 5:48 PM CDT	Special Weather Statement	OHX	Williamson	42 min
Jul 26, 5:55 PM CDT	Severe Thunderstorm Warning	OHX	Marshall, Maury, Williamson	16 min
Jul 26, 6:20 PM CDT	Special Weather Statement	OHX	Coffee	40 min
Jul 26, 6:29 PM CDT	Severe Thunderstorm Warning	OHX	Coffee	31 min
Jul 26, 6:33 PM CDT	Special Weather Statement	OHX	Van Buren	27 min

Nearby

Areal Flood Advisories in Tennessee, 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.