Alert archive / Tennessee / Flash Flood Watches in 2010
Flash Flood Watch 4, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at May 20, 2010, 12:34 PM CDT for 13 counties in Tennessee. It took effect at May 20, 2010, 1:00 PM CDT. It was in force for 18 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 2010, 12:34 PM CDT (17:34 UTC)
- In effect from
- May 20, 2010, 1:00 PM CDT
- Expired
- May 21, 2010, 7:00 AM CDT
- In force
- 18 hr
- Issued by
- NWS Nashville, TN
- Flood severity
- None
Counties Benton County, TN, Cheatham County, TN, Dickson County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lawrence County, TN, Lewis County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Wayne County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 5.6 hours before the alert went out and 87 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1062 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash 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 flash flood watch went out at May 20, 12:26 PM CDT, 8 minutes earlier.
Area forecast discussion, May 20, 12:26 PM CDT, 8 minutes before
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</html>Hazardous weather outlook, May 20, 5:25 AM CDT, 7 hours 9 minutes before
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Special weather statement, May 20, 7:38 AM CDT, 4 hours 56 minutes before
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</html>Special weather statement, May 20, 9:27 AM CDT, 3 hours 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NASHVILLE TN 927 AM CDT THU MAY 20 2010 TNZ005>007-022>026-201530- BENTON-CHEATHAM-DICKSON-HOUSTON-HUMPHREYS-MONTGOMERY-ROBERTSON- STEWART- 927 AM CDT THU MAY 20 2010 ...SIGNIFICANT WEATHER ADVISORY FOR BENTON...CHEATHAM...DICKSON... HOUSTON...HUMPHREYS...MONTGOMERY...ROBERTSON AND STEWART COUNTIES... AT 925 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES SOUTH OF ERIN...MOVING NORTHEAST AT 30 MPH. PEOPLE IN DICKSON...HOUSTON...MONTGOMERY...NORTHEASTERN BENTON... NORTHERN HUMPHREYS...NORTHWESTERN CHEATHAM...STEWART AND WESTERN ROBERTSON COUNTIES...INCLUDING THE CITY OF CLARKSVILLE...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. HALF INCH SIZE HAIL...AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. BRIEF PONDING OF WATER ON ROADWAYS IS ALSO LIKELY. 07
The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 11:19 AM CDT | Flash Flood Warning | OHX | Benton, Dickson, Houston, Humphreys, Montgomery, Stewart | 3 hr |
| May 20, 3:27 PM CDT | Flash Flood Warning | OHX | Benton, Hickman, Humphreys, Perry | 2 hr |
Nearby
Flash Flood Watches in Tennessee, 2010Every flash flood watch in 2010
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.