Alert archive / Tennessee / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 54, NWS Nashville, TN

May 1, 20104 counties in Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at May 1, 2010, 1:08 PM CDT for 4 counties in Tennessee. It was in force for 37 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 1, 2010, 1:08 PM CDT (18:08 UTC)
Expired: May 1, 2010, 1:45 PM CDT
In force: 37 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

Counties Cheatham County, TN, Davidson County, TN, Robertson County, TN, Sumner County, TN

The radar

The Nashville radar (KOHX), 24 km from the middle of the area, began a volume at 18:07 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 1, 9:52 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.1 hours before the alert went out and 31 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: 442 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 592 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 1, 10:30 AM CDT, 2 hours 38 minutes earlier.

Area forecast discussion, May 1, 10:30 AM CDT, 2 hours 38 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
1030 AM CDT SAT MAY 1 2010

.MESOSCALE UPDATE...
TOR WATCH REPLACEMENT W/WATCH #124 UNTIL 4 PM EDT. SOME EARLIER
COLLOBRATION W/SPC ABOUT POSSIBLE PDS WATCH LATER IN THE WEEKEND.
MAIN AREA FOR PDS WATCH WEST OF MID TN TNGT...BUT WL NEED TO WATCH
CLOSELY WITH NEW LLJ SHIFTING EAST TNGT.

&&

.PREV DISCUSSION... /ISSUED 935 AM CDT SAT MAY 1 2010/

MESOSCALE UPDATE...
SPC DAY1 HIGH RISK FOR SVR WX INCLUDES W MID TN. HIGHER INSTAB ACR
NORTHERN MS/AL AT THIS TIME...WITH MORE STABLE AIR IN N MID TN FM
MORNING RAINS.

SUFFICIENT SHEAR FOR ISO SUPERCELLS MOVG INTO MID TN TDAY...INCL N
MID TN W/DEEER LAYER INSTAB.

HYDROLOGY...
UP TO FIVE INCHES RAINFALL IN W MID TN THIS MORNING. POTENTIAL UP
TO EIGHT INCHES THIS WEEKEND.

&&

04

Hazardous weather outlook, May 1, 11:59 AM CDT, 1 hour 9 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NASHVILLE TN
1159 AM CDT SAT MAY 1 2010

TNZ005>010-022>031-056>064-075-077-093>095-021030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-BENTON-HOUSTON-
HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-SMITH-
JACKSON-PERRY-HICKMAN-LEWIS-WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-
CANNON-DE KALB-BEDFORD-COFFEE-WAYNE-LAWRENCE-GILES-
1159 AM CDT SAT MAY 1 2010

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SEVERE THUNDERSTORMS ARE POSSIBLE TODAY AND TONIGHT AHEAD OF A SLOW
MOVING COLD FRONT. THUNDERSTORMS WILL PRODUCE HEAVY RAINFALL WITH
FLASH FLOODING WEST OF INTERSTATE 24.

MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR
BY LISTENING TO NOAA WEATHER RADIO.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE THREAT OF MORE SEVERE THUNDERSTORMS AND FLOODING WILL CONTINUE
SUNDAY AND INTO EARLY MONDAY.

MORE INFORMATION IS AVAILABLE ON THE INTERNET AT WEATHER.GOV OR
BY LISTENING TO NOAA WEATHER RADIO.

.SPOTTER INFORMATION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS WILL LIKELY BE NEEDED.

TNZ011-032>034-065-066-078>080-021030-
PICKETT-PUTNAM-OVERTON-FENTRESS-WHITE-CUMBERLAND-WARREN-GRUNDY-
VAN BUREN-
1159 AM CDT SAT MAY 1 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

SEVERE THUNDERSTORMS ARE POSSIBLE TODAY AND TONIGHT AHEAD OF A SLOW
MOVING COLD FRONT. MINOR FLOODING AND OR FLASH FLOODING MAY OCCUR.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE THREAT OF MORE SEVERE THUNDERSTORMS AND FLOODING WILL CONTINUE
SUNDAY AND INTO EARLY MONDAY.

.SPOTTER INFORMATION STATEMENT...

REPORTS FROM TRAINED WEATHER SPOTTERS WILL LIKELY BE NEEDED.

SPOTTER THUNDERSTORM REPORTING CRITERIA...
TORNADO
FUNNEL CLOUD
FLOODING
HAIL >= 1/2 INCH
WINDS > 50 MPH (MEASURED)
STRUCTURAL DAMAGE
TREES OR POWER LINES DOWN

04

In the hours before

Local storm report, May 1, 11:52 AM CDT, 1 hour 16 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Local storm report, May 1, 11:58 AM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1158 AM CDT SAT MAY 01 2010

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

1145 AM     FLOOD            3 N NOLENSVILLE         35.99N 86.65W
05/01/2010                   DAVIDSON           TN   TRAINED SPOTTER

            A TRAINED SPOTTER REPORTED WATER OVER CULBERTSON ROAD
            ALONG MILL CREEK NEAR NOLENSVILLE.

&&

JLAROSA

Local storm report, May 1, 12:43 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1243 PM CDT SAT MAY 01 2010

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

1238 PM     FLASH FLOOD      8 S NASHVILLE           36.06N 86.78W
05/01/2010                   DAVIDSON           TN   EMERGENCY MNGR

            EMERGENCY MNGR REPORTS CLOSING OF BLUFF RD. AND
            CULVERTSON RD.

&&

CGANT

Local storm report, May 1, 12:44 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1244 PM CDT SAT MAY 01 2010

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

1236 PM     FLASH FLOOD      10 N CENTERVILLE        35.94N 87.45W
05/01/2010                   HICKMAN            TN   PUBLIC

            BOAT RESCUES ALONG I-40 NEAR MILE MARKER 153/154.

&&

04

Local storm report, May 1, 12:53 PM CDT, 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1253 PM CDT SAT MAY 01 2010

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

1250 PM     HEAVY RAIN       WAVERLY                 36.09N 87.79W
05/01/2010  M13.34 INCH      HUMPHREYS          TN   TRAINED SPOTTER

            STORM TOTAL RAINFALL OVER LAST 24HRS MEASURED AT 13.34
            INCHES BY TRAINED SPOTTER.

&&

CGANT

Local storm report, May 1, 1:01 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
101 PM CDT SAT MAY 01 2010

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

1259 PM     FLASH FLOOD      7 S WAVERLY             35.99N 87.79W
05/01/2010                   HUMPHREYS          TN   TRAINED SPOTTER

            SPOTTER RELAYING REPORTS OF WATER RESCUES NEAR THE
            HUMPHREYS AND HICKMAN COUNTY LINE...NEAR MILE MARKER 148
            ALONG INTERSTATE 40.

&&

JLAROSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 10:47 PM CDT	Severe Thunderstorm Warning	OHX	Hickman, Lewis	28 min
May 1, 2:58 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Stewart	62 min
May 1, 3:05 AM CDT	Tornado Warning	OHX	Stewart	25 min
May 1, 3:21 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Houston, Humphreys	39 min
May 1, 3:37 AM CDT	Severe Thunderstorm Warning	OHX	Montgomery, Stewart	38 min
May 1, 4:02 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Dickson, Houston, Humphreys, Perry	58 min
May 1, 4:11 AM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Montgomery, Robertson	34 min
May 1, 5:30 AM CDT	Severe Thunderstorm Warning	OHX	Benton, Humphreys	45 min
May 1, 7:19 AM CDT	Severe Thunderstorm Warning	OHX	Maury, Williamson	26 min
May 1, 8:21 AM CDT	Flash Flood Warning	OHX	Benton, Dickson, Hickman, Humphreys, Perry	8 hr
May 1, 9:50 AM CDT	Areal Flood Advisory	OHX	Cannon, Cheatham, Davidson, DeKalb, Dickson, Hickman and 5 more	6 hr
May 1, 10:26 AM CDT	Flash Flood Warning	OHX	Maury	6 hr
May 1, 10:35 AM CDT	Flash Flood Warning	OHX	Williamson	6 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Cheatham	4 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Davidson, Williamson	4 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Williamson	4 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Montgomery, Robertson	4 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Montgomery	11 hr
May 1, 11:02 AM CDT	River Flood Watch	OHX	Perry	4 hr
May 1, 12:18 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson	27 min
May 1, 12:39 PM CDT	River Flood Warning	OHX	Davidson	43 hr
May 1, 12:41 PM CDT	Severe Thunderstorm Warning	OHX	Cheatham, Davidson, Dickson	34 min
May 1, 1:38 PM CDT	Tornado Warning	OHX	Maury, Williamson	22 min
May 1, 2:13 PM CDT	Tornado Warning	OHX	Rutherford, Williamson	32 min
May 1, 2:44 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Smith, Wilson	31 min
May 1, 3:10 PM CDT	River Flood Warning	OHX	Perry	4 days
May 1, 3:10 PM CDT	River Flood Warning	OHX	Cheatham	3 days
May 1, 3:10 PM CDT	River Flood Warning	OHX	Davidson, Williamson	62 hr
May 1, 3:10 PM CDT	River Flood Warning	OHX	Williamson	54 hr
May 1, 3:10 PM CDT	River Flood Warning	OHX	Montgomery, Robertson	4 days
May 1, 3:10 PM CDT	River Flood Warning	OHX	Humphreys	4 days
May 1, 3:12 PM CDT	Severe Thunderstorm Warning	OHX	Jackson, Overton, Putnam	48 min
May 1, 3:17 PM CDT	Areal Flood Warning	OHX	Benton, Cheatham, Davidson, DeKalb, Dickson, Hickman and 16 more	24 hr
May 1, 3:18 PM CDT	Tornado Warning	OHX	Davidson, Rutherford, Williamson, Wilson	27 min
May 1, 3:43 PM CDT	River Flood Warning	OHX	Davidson	40 hr
May 1, 3:43 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence, Wayne	32 min
May 1, 4:16 PM CDT	Tornado Warning	OHX	Lawrence	29 min
May 1, 4:22 PM CDT	Flash Flood Warning	OHX	Lawrence	3 hr
May 1, 4:36 PM CDT	Severe Thunderstorm Warning	OHX	DeKalb, Warren, White	24 min
May 1, 4:41 PM CDT	Severe Thunderstorm Warning	OHX	Coffee, Grundy, Van Buren, Warren	34 min
May 1, 4:44 PM CDT	Severe Thunderstorm Warning	OHX	Giles	31 min
May 1, 4:47 PM CDT	Tornado Warning	OHX	Coffee	28 min
May 1, 4:52 PM CDT	Tornado Warning	OHX	Giles, Lawrence, Marshall	23 min
May 1, 5:04 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland, White	26 min
May 1, 5:11 PM CDT	Tornado Warning	OHX	Giles, Marshall	34 min
May 1, 5:19 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee	26 min
May 1, 5:30 PM CDT	Severe Thunderstorm Warning	OHX	Cumberland	30 min
May 1, 5:35 PM CDT	Areal Flood Warning	OHX	Bedford, Cannon, Clay, Coffee, Cumberland, DeKalb and 20 more	24 hr
May 1, 5:45 PM CDT	Tornado Warning	OHX	Coffee, Grundy, Warren	30 min
May 1, 6:02 PM CDT	Tornado Warning	OHX	Coffee, Grundy	28 min
May 1, 6:08 PM CDT	Tornado Warning	OHX	Bedford, Coffee	22 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2010 Every severe thunderstorm warning in 2010

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.