Alert archive / Tennessee / Flood Watches in 2022

Flood Watch 4, NWS Nashville, TN

April 12, 20227 counties in Tennessee

NWS Nashville, TN issued this flood watch at Apr 12, 2022, 2:35 PM CDT for 7 counties in Tennessee. It took effect at Apr 13, 2022, 1:00 AM CDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Apr 12, 2022, 2:35 PM CDT (19:35 UTC)
In effect from
Apr 13, 2022, 1:00 AM CDT
Expired
Apr 13, 2022, 9:50 PM CDT
In force
21 hr
Issued by
NWS Nashville, TN
Flood severity
None

Counties Cheatham County, TN, Dickson County, TN, Houston County, TN, Humphreys County, TN, Montgomery County, TN, Robertson County, TN, Stewart County, TN

The radar

The Ft Campbell radar (KHPX), 48 km from the middle of the area, began a volume at 19:37 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, 7.6 hours before the alert went out and 78 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2022-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2022-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
44 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
204 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 Apr 12, 2:06 PM CDT, 29 minutes earlier.

Area forecast discussion, Apr 12, 2:06 PM CDT, 29 minutes before
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Hazardous weather outlook, Apr 12, 2:35 AM CDT, 12 hours before
Hazardous Weather Outlook
National Weather Service Nashville TN
235 AM CDT Tue Apr 12 2022

TNZ005>011-023>034-056>066-075-077>080-093>095-130745-
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-
235 AM CDT Tue Apr 12 2022

This Hazardous Weather Outlook is for Middle Tennessee.

.DAY ONE...Today and tonight.

Showers and thunderstorms will move through Middle TN after midnight
tonight. A low-end damaging wind threat will accompany these storms.
The main area of concern is west of I-65.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Severe thunderstorms are possible again Wednesday evening through the
early morning hours on Thursday. Damaging wind gusts, tornadoes and
large hail are all possible. While all of Middle TN will have these
threats, the main area of concern will be along and west of I-65.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information about
observed severe weather to the NWS while following all local, state,
and CDC guidelines.

27

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 10:46 PM CDTSpecial Weather StatementOHXHouston29 min
Apr 11, 11:52 PM CDTSpecial Weather StatementOHXCheatham, Davidson38 min
Apr 12, 12:28 AM CDTSpecial Weather StatementOHXDavidson47 min
Apr 12, 1:34 AM CDTAreal Flood AdvisoryOHXCheatham, Davidson, Dickson, Sumner3 hr
Apr 12, 4:45 AM CDTSpecial Weather StatementOHXHouston, Humphreys45 min
Apr 12, 5:17 AM CDTSpecial Weather StatementOHXDickson, Humphreys43 min
Apr 12, 5:32 AM CDTSevere Thunderstorm WarningOHXDickson, Humphreys43 min
Apr 12, 5:49 AM CDTAreal Flood AdvisoryOHXMontgomery, Stewart3 hr
Apr 12, 6:15 AM CDTSpecial Weather StatementOHXDavidson, Dickson45 min
Apr 12, 7:08 AM CDTAreal Flood AdvisoryOHXCheatham, Davidson, Dickson, Rutherford, Sumner, Williamson112 min
Apr 12, 7:16 AM CDTSpecial Weather StatementOHXRutherford44 min
Apr 12, 7:31 AM CDTSevere Thunderstorm WarningOHXDavidson, Rutherford, Wilson17 min
Apr 12, 8:31 AM CDTRiver Flood AdvisoryOHXDavidson5 hr
Apr 12, 8:34 AM CDTRiver Flood AdvisoryOHXDavidson19 min
Apr 12, 8:53 AM CDTRiver Flood WarningOHXDavidson4 hr
Apr 12, 9:04 AM CDTAreal Flood AdvisoryOHXCheatham, Davidson, Dickson, Rutherford, Sumner, Williamson and 1 more116 min
Apr 12, 9:52 AM CDTRiver Flood AdvisoryOHXDavidson3 hr
Apr 12, 9:53 AM CDTRiver Flood AdvisoryOHXDavidson6 hr
Apr 12, 9:54 AM CDTRiver Flood AdvisoryOHXDavidson3 hr
Apr 12, 1:08 PM CDTRiver Flood AdvisoryOHXCheatham118 min

Nearby

Flood Watches in Tennessee, 2022Every flood watch in 2022

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.