Alert archive / Tennessee / Special Weather Statements in 2018
Special Weather Statement, NWS Nashville, TN
NWS Nashville, TN issued this special weather statement at Aug 9, 2018, 6:51 PM CDT for Perry County, Tennessee. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 9, 2018, 6:51 PM CDT (23:51 UTC)
- Expired
- Aug 9, 2018, 7:15 PM CDT
- In force
- 24 min
- Issued by
- NWS Nashville, TN
County Perry County, TN
The radar
The Ft Campbell radar (KHPX), 149 km from the middle of the area, began a volume at 23:53 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, 11.9 hours before the alert went out and 142 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
- 407 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 9, 1:37 PM CDT, 5 hours 14 minutes earlier.
Area forecast discussion, Aug 9, 1:37 PM CDT, 5 hours 14 minutes before
Area Forecast Discussion National Weather Service Nashville TN 137 PM CDT Thu Aug 9 2018 .DISCUSSION... A broken line of convection is currently making its way across Middle Tennessee, somewhat similar to yesterday's activity, albeit with less severity. Despite the presence of a weak surface ridge bisecting the mid state this afternoon, another upper trough approaching from the west is once again providing the lift and focusing necessary for today's convection. Additional activity forming over West Tennessee may cross the river later on, but the latest HRRR suggests this progressive line of storms may be the strongest we'll see today. Atmospheric models suggest a persistently amplified upper pattern that will send a series of shortwaves across Middle Tennessee through Sunday night, and then a strong upper ridge developing over the region starting on Monday. So look for a decrease in POP's lasting at least through the middle of next week. However, the upper pattern will remain amplified even during this nadir of active weather, and both the GFS and Euro bring another shortwave into Middle Tennessee by about Thursday, with a corresponding increase in POP's. Forecast soundings continue to show only modest levels of instability for the foreseeable future, and the SPC isn't hinting at anything severe for Middle Tennessee in its latest convective outlooks. As for temperatures, readings will remain at or slightly below normal until the middle of next week. Even then, highs will only top out in the low 90's. So no heat-related issues are anticipated for at least the next 7 days. && .AVIATION... 18Z TAF DISCUSSION. Scattered showers and thunderstorms continue to move across the area. CSV will see this main line of storms arrive between 18Z and 19Z bringing potential IFR conditions with it. Another band of showers developing in Western TN will move into CKV between 19Z and 20Z bringing MVFR conditions along with it. Have left in VCTS/VCSH at all terminals through the afternoon hours. MVFR may develop overnight at CSV and CKV around 08Z. Fog will dissipate around 12Z. In terms of additional showers at all terminals, short term models are struggling with timing early tomorrow morning through mid day tomorrow. Have left out any mention of showers due to the uncertainty and will re-address the issue in a later TAF cycle. && .PRELIMINARY POINT TEMPS/POPS... Nashville 71 85 69 90 71 / 50 60 20 20 20 Clarksville 69 84 67 88 69 / 50 50 0 20 20 Crossville 66 78 64 82 66 / 50 70 30 20 20 Columbia 69 84 67 88 69 / 50 60 10 20 20 Lawrenceburg 68 84 65 87 67 / 50 60 20 20 20 Waverly 68 84 67 88 69 / 50 50 0 20 20 && .OHX WATCHES/WARNINGS/ADVISORIES... NONE. && DISCUSSION......08 AVIATION........MacDonald
Hazardous weather outlook, Aug 9, 8:15 AM CDT, 10 hours 36 minutes before
Hazardous Weather Outlook National Weather Service Nashville TN 815 AM CDT Thu Aug 9 2018 TNZ005>011-023>034-056>066-075-077>080-093>095-101315- 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- 815 AM CDT Thu Aug 9 2018 This Hazardous Weather Outlook is for portions of Middle Tennessee. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Local storm report, Aug 9, 3:46 PM CDT, 3 hours 5 minutes before
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</html>Local storm report, Aug 9, 5:29 PM CDT, 1 hour 22 minutes before
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</html>Local storm report, Aug 9, 5:31 PM CDT, 1 hour 20 minutes before
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</html>Local storm report, Aug 9, 5:50 PM CDT, 1 hour 1 minute before
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</html>Local storm report, Aug 9, 6:09 PM CDT, 42 minutes before
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</html>Special weather statement, Aug 9, 6:51 PM CDT, 0 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 |
|---|---|---|---|---|
| Aug 9, 11:25 AM CDT | Special Weather Statement | OHX | Wilson | 35 min |
| Aug 9, 11:50 AM CDT | Special Weather Statement | OHX | Cannon | 40 min |
| Aug 9, 12:36 PM CDT | Special Weather Statement | OHX | DeKalb | 24 min |
| Aug 9, 1:13 PM CDT | Special Weather Statement | OHX | Putnam | 47 min |
| Aug 9, 1:19 PM CDT | Special Weather Statement | OHX | Coffee | 26 min |
| Aug 9, 1:57 PM CDT | Special Weather Statement | OHX | Cumberland | 48 min |
| Aug 9, 2:17 PM CDT | Special Weather Statement | OHX | Van Buren | 28 min |
| Aug 9, 3:03 PM CDT | Special Weather Statement | OHX | Dickson, Houston | 42 min |
Nearby
Special Weather Statements in Tennessee, 2018Every special weather statement in 2018
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.