Alert archive / Tennessee / Flood Watches in 2011

Flood Watch 1, NWS Nashville, TN

March 4, 201139 counties in Tennessee

NWS Nashville, TN issued this flood watch at Mar 4, 2011, 4:00 AM CST for 39 counties in Tennessee. It took effect at Mar 5, 2011, 6:00 AM CST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Mar 4, 2011, 4:00 AM CST (10:00 UTC)
In effect from: Mar 5, 2011, 6:00 AM CST
Expired: Mar 5, 2011, 3:30 PM CST
In force: 10 hr
Issued by: NWS Nashville, TN
Flood severity: None

All 39 counties

Bedford County, TN, Benton County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Nashville radar (KOHX), 29 km from the middle of the area, began a volume at 10:04 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 00:00Z, 10.0 hours before the alert went out and 18 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2596 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 282 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 flood watch 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 flood watch went out at Mar 3, 11:08 PM CST, 4 hours 52 minutes earlier.

Area forecast discussion, Mar 3, 11:08 PM CST, 4 hours 52 minutes before

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Hazardous weather outlook, Mar 3, 4:41 AM CST, 23 hours 19 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
Mar 4, 10:11 AM CST	River Flood Advisory	OHX	Davidson	30 hr
Mar 4, 10:11 AM CST	River Flood Advisory	OHX	Davidson	30 hr
Mar 4, 10:11 AM CST	River Flood Advisory	OHX	Davidson	30 hr
Mar 4, 10:21 AM CST	River Flood Advisory	OHX	Perry	46 hr
Mar 4, 10:45 AM CST	River Flood Advisory	OHX	Bedford, Marshall	46 hr
Mar 4, 10:45 AM CST	River Flood Advisory	OHX	Maury	46 hr
Mar 4, 10:45 AM CST	River Flood Advisory	OHX	Hickman	46 hr

Nearby

Flood Watches in Tennessee, 2011 Every flood watch in 2011

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.