Alert archive / Tennessee / Flash Flood Warnings in 2024

Flash Flood Warning 31, NWS Nashville, TN

July 30, 2024White County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 30, 2024, 4:24 PM CDT for White County, Tennessee. It was in force for 3 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 30, 2024, 4:24 PM CDT (21:24 UTC)
Expired: Jul 30, 2024, 7:30 PM CDT
In force: 3 hr
Issued by: NWS Nashville, TN
Area: Storm-based polygon
Flood severity: None

County White County, TN

The radar

The Nashville radar (KOHX), 107 km from the middle of the area, began a volume at 21:28 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.

What was reported inside it

Time	Report	Where	Remark
Jul 30, 5:00 PM CDT	FLASH FLOOD	Sparta, TN	Considerable flooding reported around White County High School.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 36 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.4 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1824 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 810 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 176 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

As transmitted.

858 
WGUS54 KOHX 302124
FFWOHX
TNC185-310030-
/O.NEW.KOHX.FF.W.0031.240730T2124Z-240731T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Nashville TN
424 PM CDT Tue Jul 30 2024

The National Weather Service in Nashville has issued a

* Flash Flood Warning for...
  Central White County in middle Tennessee...

* Until 730 PM CDT.

* At 424 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 inches of 
  rain have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Sparta.

Getting reports of flooded roads in the Sparta area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3599 8544 3592 8533 3582 8536 3593 8553
      3603 8551

FLASH FLOOD...RADAR INDICATED

$$

Mueller

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Jul 30, 12:06 PM CDT, 4 hours 18 minutes earlier.

Area forecast discussion, Jul 30, 12:06 PM CDT, 4 hours 18 minutes before

Area Forecast Discussion
National Weather Service Nashville TN
1206 PM CDT Tue Jul 30 2024

...New AVIATION...

.SHORT TERM...
(Rest of today through Wednesday Night)
Issued at 1113 AM CDT Tue Jul 30 2024

Pretty quiet across Middle TN as we roll up on forecast time. Some
stability waves are being seen in visible satellite across our
eastern counties and this is likely keeping activity at-bay this
morning. Because of the lack of activity, the Heat Advisory
currently out for about 2/3 of the mid-state is proving to be
worthy. Sticking with the 10 degrees at 10 am mantra, BNA is
looking squarely at an afternoon high of 98 degrees. Coupled with
mid-70s dew points, Heat Index values this afternoon will approach
110 degrees in many areas within the advisory. The next question
is eventual thunderstorms and will we get them. The northwest flow
aloft currently being experienced across the region is easily
showing us why this pattern is so difficult to forecast. Storms
were being shown in our eastern counties first thing this morning
across most of the CAMs last night. All of that ended up well east
of Middle TN. Not much is different at this time. CAMs are all
over the place for this afternoon and evening. Currently, we are
tracking two clusters of storms: first, the one in Illinois and a
second behind it in Iowa. Watching in-situ radar and satellite,
one would surmise that the first cluster may actually miss the
mid-state altogether. For now, will focus afternoon PoPs east of
I-65, in case this early round clips our northeast (northern
Cumberland Plateau) or we see scattered activity ahead of it. The
second round, currently back in Iowa, is being shown in several
CAMs to broach the TN-KY state line in our north after 7 pm this
evening. Not a boat-load of confidence in this occurring, however,
due to the trajectory of the previous two MCSs. For now, will
carry about a 40 PoP into the evening. In either of these two
instances, this afternoon or this evening, any thunderstorms will
carry a damaging wind risk (65+ mph), heavy (and potentially
flooding) rains and as we saw yesterday, a tornado can't be ruled
out. If you have outdoor plans between 1 pm and about midnight,
please remain weather aware.

Well, that covers the next 14 hours. Where do we go from there?
The northwest flow aloft should start breaking down tomorrow
night. This means tomorrow, we could see more of the same. Low-
confidence PoP forecasts, as well as HOT and HUMID air, once
again. Have issued a Heat Advisory for the same region of Middle
TN for Wednesday, but with a low-confidence PoP forecast, any
storms in the afternoon in the advisory area would negate the
crazy heat.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 1113 AM CDT Tue Jul 30 2024

Once the northwest flow ends (hopefully tomorrow night), upper
ridging will start to influence the region a little more. This means
Thursday might actually be the hottest day of the week. Southwest
boundary layer flow may keep us from reaching triple digit mercury
values, but Heat Index values will likely be at least Heat Advisory
level. Will continue with the one-day-at-a-time thinking and see
what Thursday looks like tomorrow. The other thing happening on
Thursday is an upper level low that drags down over the Great Lakes,
which may give us our next batch of weather on Friday and Saturday
as an associated boundary slips into the Ohio and TN Valleys. This
has been depicted for several days now, so I would say some storms
will accompany this boundary, especially with the instability
already in place. Timing is a little suspect right now, but best
guess is sometime Friday afternoon, maybe lasting into early
Saturday morning.

Now for the best part of this forecast: after Saturday, we should
get a break. We should be able to turn the spigot off for at least a
few days and while temperatures will likely remain slightly above
seasonal averages, we may get to dry out through the first part of
next week.

&&

.AVIATION...
(18Z TAFS)
Issued at 1200 PM CDT Tue Jul 30 2024

Scattered thunderstorms are expected to develop across the region
this afternoon and there may be some additional clusters of
storms tonight into Wednesday morning. Greatest coverage will be
around SRB/CSV this afternoon, so tempo groups will be included.
Other sites BNA/MQY/CKV will have prob30 this afternoon. Storms
will contain gusty winds and torrential downpours with brief
vsbys impacts. Outside the storms, VFR with generally southwest
winds 5-10KT.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      78  98  79  99 /  30  20   0  10
Clarksville    77  96  78  97 /  30  10   0  10
Crossville     69  89  71  92 /  30  50  10  20
Columbia       75  97  76  99 /  20  10   0  10
Cookeville     71  90  74  93 /  30  40  10  10
Jamestown      70  89  73  92 /  30  50  10  20
Lawrenceburg   75  95  76  97 /  20  20   0  10
Murfreesboro   75  97  76  99 /  30  20   0  10
Waverly        75  97  76  97 /  20  10   0   0

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for Bedford-Cheatham-
Davidson-Dickson-Giles-Hickman-Houston-Humphreys-Lawrence-Lewis-
Macon-Marshall-Maury-Montgomery-Perry-Robertson-Rutherford-Smith-
Stewart-Sumner-Trousdale-Wayne-Williamson-Wilson.

Heat Advisory from noon to 7 PM CDT Wednesday for Bedford-
Cheatham-Davidson-Dickson-Giles-Hickman-Houston-Humphreys-
Lawrence-Lewis-Macon-Marshall-Maury-Montgomery-Perry-Robertson-
Rutherford-Smith-Stewart-Sumner-Trousdale-Wayne-Williamson-
Wilson.

&&

SHORT TERM...Unger
LONG TERM....Unger
AVIATION.....13

In the hours before

Local storm report, Jul 30, 4:02 PM CDT, 22 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
402 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 PM     Tstm Wnd Dmg     4 W Clarkrange          36.17N 85.10W
07/30/2024                   Fentress           TN   Public

            Large tree down.

&&

SWU

Local storm report, Jul 30, 4:04 PM CDT, 20 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
404 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0316 PM     Tstm Wnd Dmg     6 WNW South Carthage    36.26N 86.07W
07/30/2024                   Smith              TN   Public

            Tree on Hwy 70 in Rome.

&&

SWU

Local storm report, Jul 30, 4:10 PM CDT, 14 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
410 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0347 PM     Tstm Wnd Dmg     5 SSE Pleasant Hill     35.92N 85.15W
07/30/2024                   Cumberland         TN   Public

            Multiple trees down in this area.

&&

SWU

Local storm report, Jul 30, 4:12 PM CDT, 12 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
412 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0400 PM     Tstm Wnd Dmg     1 WSW Cookeville        36.15N 85.51W
07/30/2024                   Putnam             TN   Emergency Mngr

            Parking lot and surrounding streets flooded
            in Cookeville.

&&

SWU

Local storm report, Jul 30, 4:13 PM CDT, 11 minutes before

Preliminary Local Storm Report
National Weather Service Nashville TN
413 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0354 PM     Tstm Wnd Dmg     Sparta                  35.94N 85.47W
07/30/2024                   White              TN   Trained Spotter

            Tree down at the intersection of N Spring St
            and Wright Rd.

&&

21

Local storm report, Jul 30, 4:23 PM CDT, 1 minute before

Preliminary Local Storm Report
National Weather Service Nashville TN
423 PM CDT Tue Jul 30 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0422 PM     Tstm Wnd Dmg     Sparta                  35.93N 85.47W
07/30/2024                   White              TN   Public

            Water over the road in Sparta.

&&

SWU

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 11:12 AM CDT	Heat Advisory	OHX	Bedford, Cheatham, Davidson, Dickson, Giles, Hickman and 18 more	56 hr
Jul 30, 1:16 PM CDT	Special Weather Statement	OHX	Overton	29 min
Jul 30, 1:29 PM CDT	Special Weather Statement	OHX	White	31 min
Jul 30, 1:30 PM CDT	Special Weather Statement	OHX	Cumberland	30 min
Jul 30, 1:47 PM CDT	Severe Thunderstorm Warning	OHX	White	28 min
Jul 30, 1:59 PM CDT	Special Weather Statement	OHX	Overton	31 min
Jul 30, 2:04 PM CDT	Severe Thunderstorm Warning	OHX	Fentress, Overton, Putnam	26 min
Jul 30, 2:11 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren, White	19 min
Jul 30, 2:22 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Putnam	23 min
Jul 30, 2:26 PM CDT	Special Weather Statement	OHX	Macon, Robertson, Sumner	34 min
Jul 30, 2:29 PM CDT	Special Weather Statement	OHX	Clay, Fentress, Jackson, Pickett	31 min
Jul 30, 2:35 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Fentress, Overton, Pickett	40 min
Jul 30, 2:41 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Macon, Robertson, Sumner, Trousdale	34 min
Jul 30, 2:46 PM CDT	Areal Flood Advisory	OHX	Cumberland, Fentress, Overton, Putnam	3 hr
Jul 30, 2:53 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Overton, Putnam	19 min
Jul 30, 3:02 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Macon, Smith, Sumner, Trousdale, Wilson	58 min
Jul 30, 3:08 PM CDT	Severe Thunderstorm Warning	OHX	Clay, DeKalb, Jackson, Macon, Overton, Putnam and 2 more	52 min
Jul 30, 3:11 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, Fentress, Overton, Pickett, Putnam	34 min
Jul 30, 3:17 PM CDT	Areal Flood Advisory	OHX	Fentress, Pickett	102 min
Jul 30, 3:35 PM CDT	Special Weather Statement	OHX	Davidson	25 min
Jul 30, 3:37 PM CDT	Areal Flood Advisory	OHX	Jackson, Overton, Putnam	3 hr
Jul 30, 3:42 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Davidson, DeKalb, Rutherford, Smith, Warren and 2 more	48 min
Jul 30, 3:44 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, DeKalb, Putnam, Smith, Van Buren, Warren and 1 more	46 min
Jul 30, 4:09 PM CDT	Flash Flood Warning	OHX	Putnam	3 hr
Jul 30, 4:10 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Grundy, Rutherford, Van Buren and 1 more	65 min
Jul 30, 4:19 PM CDT	Areal Flood Advisory	OHX	DeKalb, Putnam, Smith, White, Wilson	3 hr
Jul 30, 5:25 PM CDT	Special Weather Statement	OHX	Warren	35 min
Jul 30, 6:24 PM CDT	Special Weather Statement	OHX	Davidson	36 min
Jul 30, 6:54 PM CDT	Special Weather Statement	OHX	Davidson	36 min
Jul 30, 6:57 PM CDT	Severe Thunderstorm Warning	OHX	Davidson, Robertson, Sumner	33 min

Nearby

Flash Flood Warnings in Tennessee, 2024 Every flash flood warning in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.