Alert archive / Tennessee / Areal Flood Warnings in 2017
Areal Flood Warning 1, NWS Nashville, TN
NWS Nashville, TN issued this areal flood warning at May 11, 2017, 11:37 PM CDT for Robertson County, Sumner County, Tennessee. It was in force for 113 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 11, 2017, 11:37 PM CDT (04:37 UTC)
- Expired
- May 12, 2017, 1:30 AM CDT
- In force
- 113 min
- Issued by
- NWS Nashville, TN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Robertson County, TN, Sumner County, TN
The radar
The Nashville radar (KOHX), 29 km from the middle of the area, began a volume at 04:39 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, 4.6 hours before the alert went out and 41 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
- 904 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 1372 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.2
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 May 11, 8:28 PM CDT, 3 hours 9 minutes earlier.
Area forecast discussion, May 11, 8:28 PM CDT, 3 hours 9 minutes before
Area Forecast Discussion National Weather Service Nashville TN 828 PM CDT Thu May 11 2017 .UPDATE... FOR EVENING DISCUSSION. && .DISCUSSION... Quick update tonight to update pops and other grids with current precip timing. Short term models are quite bullish on bringing in precip from western TN this evening and continuing overnight. Upped pops slightly this evening as a result. Initial shortwave/weak cold front looks to be the primary source for forcing this evening and may provide enough lift for some storms to produce hail and/or damaging winds. Enough instability exists along with increasing pwat values for some flash flood concerns, especially with training/slow moving convection. Other than that kept the rest of the forecast in tact as it looks on track. && .AVIATION... 00Z TAF DISCUSSION. VFR conditions this evening will deteriorate tonight and especially on Friday as large complex of showers and storms in west TN moves across airports. Vis/cigs will lower to IFR late in TAF period. Light west to southwest winds tonight will become light and variable on Friday. && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......Barnwell AVIATION........Shamburger
Hazardous weather outlook, May 11, 3:26 PM CDT, 8 hours 11 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 326 PM CDT Thu May 11 2017 TNZ005>011-023>034-056>066-075-077>080-093>095-122030- 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- 326 PM CDT Thu May 11 2017 This Hazardous Weather Outlook is for portions of Middle Tennessee. .DAY ONE...This Afternoon and Tonight. A few strong to severe storms will be possible tonight between 8 pm and 2 am, generally for areas along and north of I-40. The main concerns will be damaging winds and large hail. Heavy rains might also cause some localized flooding issues by Friday morning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may become necessary tonight. Spotter Thunderstorm Reporting Criteria Tornado Funnel Cloud Flooding Hail >= 1/2 inch Winds > 50 MPH (Measured) Structural Damage Trees or Power Lines Down 27
In the hours before
Special weather statement, May 11, 9:46 PM CDT, 1 hour 51 minutes before
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</html>Local storm report, May 11, 10:45 PM CDT, 52 minutes before
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</html>The office that day
Everything else NWS Nashville, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:00 PM CDT | Special Weather Statement | OHX | Fentress, Overton, Pickett | 60 min |
| May 11, 7:38 PM CDT | Special Weather Statement | OHX | Macon, Trousdale | 52 min |
| May 11, 8:25 PM CDT | Special Weather Statement | OHX | Jackson, Sumner, Trousdale | 50 min |
| May 11, 8:48 PM CDT | Areal Flood Advisory | OHX | Jackson, Macon, Smith, Sumner, Trousdale | 117 min |
| May 11, 9:37 PM CDT | Special Weather Statement | OHX | Macon, Robertson, Sumner, Trousdale | 38 min |
| May 11, 9:39 PM CDT | Flash Flood Watch | OHX | Cheatham, Dickson, Houston, Humphreys, Macon, Montgomery and 4 more | 5 hr |
| May 11, 9:44 PM CDT | Flash Flood Warning | OHX | Robertson, Sumner | 2 hr |
| May 11, 9:46 PM CDT | Special Weather Statement | OHX | Houston | 44 min |
| May 11, 10:15 PM CDT | Special Weather Statement | OHX | Montgomery, Robertson | 45 min |
| May 11, 10:17 PM CDT | Special Weather Statement | OHX | Sumner | 43 min |
| May 11, 10:19 PM CDT | Special Weather Statement | OHX | Putnam | 41 min |
| May 11, 11:03 PM CDT | Special Weather Statement | OHX | Sumner | 42 min |
| May 11, 11:27 PM CDT | Areal Flood Advisory | OHX | Smith, Sumner, Trousdale, Wilson | 2 hr |
| May 11, 11:48 PM CDT | Areal Flood Advisory | OHX | Davidson, Sumner, Wilson | 117 min |
| May 12, 12:57 AM CDT | Areal Flood Advisory | OHX | Cannon, DeKalb, Rutherford, Smith, Wilson | 2 hr |
| May 12, 1:52 AM CDT | Special Weather Statement | OHX | White | 23 min |
Nearby
Areal Flood Warnings in Tennessee, 2017Every areal flood warning in 2017
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.