Alert archive / Tennessee / Areal Flood Warnings in 2016

Areal Flood Warning 8, NWS Nashville, TN

July 29, 2016Macon County, Sumner County, Trousdale County, Tennessee

NWS Nashville, TN issued this areal flood warning at Jul 29, 2016, 1:55 PM CDT for Macon County, Sumner County, Trousdale County, Tennessee. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 29, 2016, 1:55 PM CDT (18:55 UTC)
Expired: Jul 29, 2016, 4:00 PM CDT
In force: 2 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

Counties Macon County, TN, Sumner County, TN, Trousdale County, TN

The radar

The Nashville radar (KOHX), 40 km from the middle of the area, began a volume at 18:56 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, 6.9 hours before the alert went out and 51 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: 777 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 722 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Jul 29, 10:20 AM CDT, 3 hours 35 minutes earlier.

Area forecast discussion, Jul 29, 10:20 AM CDT, 3 hours 35 minutes before

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Hazardous weather outlook, Jul 29, 5:26 AM CDT, 8 hours 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
526 AM CDT FRI JUL 29 2016

TNZ005>011-023>034-056>066-075-077>080-093>095-301030-
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-
526 AM CDT FRI JUL 29 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF MIDDLE
TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

A FEW STRONG THUNDERSTORMS WITH LOCALIZED FLOODING AND GUSTY
WINDS OVER 40 MPH ARE POSSIBLE THROUGH THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

PLEASE REPORT ANY FLOODING OR SEVERE WEATHER TO THE NATIONAL
WEATHER SERVICE IN NASHVILLE.

HURLEY

In the hours before

Local storm report, Jul 29, 12:23 PM CDT, 1 hour 32 minutes before

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Local storm report, Jul 29, 12:24 PM CDT, 1 hour 31 minutes before

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Local storm report, Jul 29, 12:43 PM CDT, 1 hour 12 minutes before

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Local storm report, Jul 29, 12:45 PM CDT, 1 hour 10 minutes before

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Local storm report, Jul 29, 12:46 PM CDT, 1 hour 9 minutes before

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Special weather statement, Jul 29, 1:04 PM CDT, 51 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 1:32 AM CDT	Areal Flood Advisory	OHX	Montgomery, Robertson	118 min
Jul 29, 3:30 AM CDT	Areal Flood Advisory	OHX	Smith, Sumner, Trousdale, Wilson	3 hr
Jul 29, 10:44 AM CDT	Areal Flood Advisory	OHX	Robertson, Sumner	3 hr
Jul 29, 11:37 AM CDT	Flash Flood Warning	OHX	Macon, Sumner, Trousdale	2 hr
Jul 29, 12:08 PM CDT	Special Weather Statement	OHX	Sumner	37 min
Jul 29, 12:54 PM CDT	Flash Flood Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	3 hr
Jul 29, 12:56 PM CDT	Flash Flood Warning	OHX	Clay, Jackson	3 hr
Jul 29, 1:04 PM CDT	Special Weather Statement	OHX	Smith	41 min
Jul 29, 1:59 PM CDT	Special Weather Statement	OHX	Putnam	46 min
Jul 29, 2:53 PM CDT	Special Weather Statement	OHX	Sumner	52 min
Jul 29, 3:42 PM CDT	Areal Flood Warning	OHX	Clay, Jackson	2 hr
Jul 29, 3:44 PM CDT	Areal Flood Warning	OHX	Macon, Smith, Sumner, Trousdale, Wilson	2 hr

Nearby

Areal Flood Warnings in Tennessee, 2016 Every areal flood warning in 2016

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.