Alert archive / Tennessee / Flash Flood Watches in 2019
Flash Flood Watch 5, NWS Nashville, TN
NWS Nashville, TN issued this flash flood watch at Dec 16, 2019, 7:39 AM CST for 25 counties in Tennessee. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Dec 16, 2019, 7:39 AM CST (13:39 UTC)
- Expired
- Dec 16, 2019, 7:54 PM CST
- In force
- 12 hr
- Issued by
- NWS Nashville, TN
- Flood severity
- None
All 25 counties
Cannon County, TN, Cheatham County, TN, Clay County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Macon 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, Williamson County, TN, Wilson County, TN
The radar
The Nashville radar (KOHX), 7 km from the middle of the area, began a volume at 13:38 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, 1.7 hours before the alert went out and 14 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
- 495 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 201 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 Dec 16, 5:42 AM CST, 1 hour 57 minutes earlier.
Area forecast discussion, Dec 16, 5:42 AM CST, 1 hour 57 minutes before
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</html>Hazardous weather outlook, Dec 16, 5:02 AM CST, 2 hours 37 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 502 AM CST Mon Dec 16 2019 TNZ005>011-023>034-056>066-075-077>080-093>095-171115- 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 CST Mon Dec 16 2019 This Hazardous Weather Outlook is for portions of Middle Tennessee. .DAY ONE...Today and Tonight Widespread rain and a few thunderstorms will affect Middle Tennessee today and into the evening ahead of a strong cold front. Some of these storms may be strong to severe, mainly south of I-40. Damaging wind gusts are the primary threat. There is also the potential for flooding, especially in areas that experience multiple heavy showers and storms. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed today. Rose
In the hours before
Special weather statement, Dec 16, 1:46 AM CST, 5 hours 53 minutes before
Special Weather Statement
National Weather Service Nashville TN
146 AM CST Mon Dec 16 2019
TNZ008>010-029-031-160830-
Trousdale TN-Sumner TN-Clay TN-Jackson TN-Macon TN-
146 AM CST Mon Dec 16 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN JACKSON...CENTRAL
SUMNER...NORTHWESTERN CLAY...MACON AND NORTHERN TROUSDALE COUNTIES
UNTIL 230 AM CST...
At 146 AM CST, Doppler radar was tracking a strong thunderstorm near
Gallatin, moving east at 55 mph.
Half inch hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Gallatin, Lafayette, Hartsville, Hendersonville, Westmoreland, Red
Boiling Springs, Cottontown, Bethpage, Bugtussle, Oak Grove and
Bledsoe Creek State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3662 8575 3647 8570 3634 8657 3652 8662
3664 8615
TIME...MOT...LOC 0746Z 255DEG 49KT 3646 8650
RoseThe office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 16, 12:18 AM CST | Special Weather Statement | OHX | Robertson | 42 min |
| Dec 16, 12:57 AM CST | Special Weather Statement | OHX | Macon, Robertson, Sumner | 48 min |
| Dec 16, 1:04 AM CST | Areal Flood Advisory | OHX | Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson and 1 more | 6 hr |
| Dec 16, 1:07 AM CST | Special Weather Statement | OHX | Cheatham, Dickson, Houston | 38 min |
| Dec 16, 1:46 AM CST | Special Weather Statement | OHX | Macon, Sumner | 44 min |
| Dec 16, 1:50 AM CST | Areal Flood Advisory | OHX | Cheatham, Davidson, Macon, Robertson, Sumner, Trousdale and 1 more | 6 hr |
| Dec 16, 3:14 AM CST | Flash Flood Warning | OHX | Sumner | 2 hr |
| Dec 16, 10:29 AM CST | River Flood Advisory | OHX | Cheatham | 16 hr |
| Dec 16, 10:49 AM CST | Special Weather Statement | OHX | Houston | 26 min |
| Dec 16, 11:23 AM CST | Areal Flood Advisory | OHX | Houston, Humphreys | 3 hr |
| Dec 16, 1:18 PM CST | Special Weather Statement | OHX | Cheatham, Robertson | 27 min |
| Dec 16, 1:46 PM CST | Special Weather Statement | OHX | Sumner | 29 min |
| Dec 16, 2:23 PM CST | Areal Flood Advisory | OHX | Cheatham, Davidson, Macon, Montgomery, Robertson, Sumner | 3 hr |
| Dec 16, 3:40 PM CST | Special Weather Statement | OHX | Lawrence | 35 min |
| Dec 16, 3:44 PM CST | Flash Flood Warning | OHX | Macon, Robertson, Sumner | 3 hr |
| Dec 16, 4:25 PM CST | Severe Thunderstorm Warning | OHX | Lawrence, Lewis, Perry, Wayne | 35 min |
| Dec 16, 4:34 PM CST | Severe Thunderstorm Warning | OHX | Lawrence, Wayne | 41 min |
| Dec 16, 5:15 PM CST | Severe Thunderstorm Warning | OHX | Giles, Lawrence, Marshall, Maury | 45 min |
| Dec 16, 5:46 PM CST | Severe Thunderstorm Warning | OHX | Bedford, Marshall | 26 min |
Nearby
Flash Flood Watches in Tennessee, 2019Every flash flood watch in 2019
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.