Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 162, NWS Nashville, TN

July 22, 2008Cumberland County, Tennessee

NWS Nashville, TN issued this severe thunderstorm warning at Jul 22, 2008, 2:52 PM CDT for Cumberland County, Tennessee. It was in force for 33 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: Jul 22, 2008, 2:52 PM CDT (19:52 UTC)
Expired: Jul 22, 2008, 3:25 PM CDT
In force: 33 min
Issued by: NWS Nashville, TN
Area: Storm-based polygon

County Cumberland County, TN

The radar

The Knoxville radar (KMRX), 140 km from the middle of the area, began a volume at 19:52 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.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 0 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 22, 12:34 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 7.9 hours before the alert went out and 149 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: 2116 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1289 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOHX 221952
SVROHX
TNC035-222025-
/O.NEW.KOHX.SV.W.0162.080722T1952Z-080722T2025Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
252 PM CDT TUE JUL 22 2008

THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CUMBERLAND COUNTY IN TENNESSEE...
  THIS INCLUDES THE CITY OF CROSSVILLE...

* UNTIL 325 PM CDT

* AT 249 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR FAIRFIELD GLADE...OR 10
  MILES EAST OF CROSSVILLE...AND MOVING EAST AT 13 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL EASTERN CUMBERLAND COUNTY AT 310 PM CDT

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT
TUESDAY EVENING FOR CENTRAL TENNESSEE.

LAT...LON 3585 8476 3581 8498 3610 8519 3611 8515
      3611 8514 3612 8513 3616 8503 3612 8487
      3597 8470 3589 8470
TIME...MOT...LOC 1952Z 271DEG 11KT 3593 8484

$$

21

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 Jul 22, 2:56 AM CDT, 11 hours 56 minutes earlier.

Area forecast discussion, Jul 22, 2:56 AM CDT, 11 hours 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NASHVILLE TN
256 AM CDT TUE JUL 22 2008

.SHORT TERM...IT WAS WARM AND MUGGY ACROSS THE MID STATE THIS
MORNING, WITH TEMPERATURES HANGING IN THE 70S.

EARLY MORNING RADAR LOOPS SHOWED A WELL-DEFINED OUTFLOW BOUNDARY,
SWUNG OUT FROM CONVECTION OVER EASTERN MISSOURI AND SOUTHERN
ILLINOIS, PUSHING INTO THE PADUCAH AREA. THIS WILL LIKELY BECOME A
FOCUS FOR ADDITIONAL CONVECTION JUST TO OUR NORTHWEST LATER THIS
MORNING, WHICH SHOULD WORK ITS WAY INTO NORTHWESTERN MIDDLE
TENNESSEE BY THIS AFTERNOON. IN ADDITION, EXPECT THE LIKELIHOOD
FOR MCS GENERATION IN THE SOUTHEAST MISSOURI AREA THIS AFTERNOON,
WITH THUNDERSTORMS SURGING TO THE EAST SOUTHEAST TOWARD THE MID
STATE. BELIEVE THIS ACTIVITY WILL LIKELY SPREAD ACROSS OUR
FORECAST AREA TONIGHT, ESPECIALLY NORTHERN SECTIONS, AS COLD FRONT
WORKS SOUTHWARD ACROSS KENTUCKY. SPC OUTLOOK INDICATES A SLIGHT
RISK FOR SEVERE THUNDERSTORMS IN MIDDLE TENNESSEE TODAY AND
TONIGHT, AND WOULD NOT BE SURPRISED TO SEE A FEW SEVERE STORMS IN
OUR AREA ON WEDNESDAY AS WELL (ESPECIALLY OVER OUR EXTREME
SOUTHERN AREAS, AHEAD OF THE COLD FRONT). WILL LEAVE MENTION OF
POSSIBILITY OF SEVERE IN ZFP FORECAST FOR LATE TODAY AND TONIGHT,
BUT LEAVE IT OUT FOR WEDNESDAY FOR RIGHT NOW AND GIVE DAY SHIFT A
CHANCE TO LOOK AT THAT POSSIBILITY A LITTLE CLOSER.

WILL ALSO MENTION HEAVY RAINFALL POTENTIAL WITH THUNDERSTORMS TONIGHT,
AS PWS AHEAD OF COLD FRONT WILL BE CLOSE TO TWO INCHES.

BRIEF REPRIEVE FROM THE HOT AND STICKY WEATHER, BEHIND THE FRONT,
WILL COME TO AN END BY FRIDAY AS FLOW TURNS BACK TO THE SOUTH AND
THE HIGHER DEW POINTS RETURN.

AS FAR AS TEMPERATURES GO, IT LOOKS LIKE ONE MORE DAY OF HEAT
INDICES AROUND 100 TODAY, AND MAY MENTION HEAT INDICES IN A
HEADLINE JUST TO KEEP EVERYONE AWARE OF HEAT-RELATED HEALTH ISSUES.

.LONG TERM...OUR SUMMER OF COLD FRONTS CONTINUES INTO EARLY NEXT
WEEK, AS YET ANOTHER COLD FRONT IS PROGGED TO DROP INTO OUR NECK
OF THE WOODS BY MONDAY OR TUESDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
NASHVILLE      97  71  86  67 /  30  60  40  10
CLARKSVILLE    94  69  86  63 /  30  80  30  10
CROSSVILLE     91  66  79  61 /  30  60  50  10
COLUMBIA       97  71  86  67 /  20  60  50  10
LAWRENCEBURG   98  72  86  67 /  20  50  60  10
WAVERLY        95  70  86  65 /  30  80  40  10

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

19

Hazardous weather outlook, Jul 22, 5:04 AM CDT, 9 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NASHVILLE TN
504 AM CDT TUE JUL 22 2008

TNZ005>011-022>034-056>066-075-077>080-093>095-231030-
STEWART-MONTGOMERY-ROBERTSON-SUMNER-MACON-CLAY-PICKETT-BENTON-
HOUSTON-HUMPHREYS-DICKSON-CHEATHAM-DAVIDSON-WILSON-TROUSDALE-
SMITH-JACKSON-PUTNAM-OVERTON-FENTRESS-PERRY-HICKMAN-LEWIS-
WILLIAMSON-MAURY-MARSHALL-RUTHERFORD-CANNON-DEKALB-WHITE-
CUMBERLAND-BEDFORD-COFFEE-WARREN-GRUNDY-VAN BUREN-WAYNE-LAWRENCE-
GILES-
504 AM CDT TUE JUL 22 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT

IT WILL BE ANOTHER HOT DAY ACROSS THE MID STATE ON TUESDAY, WITH
TEMPERATURES EXPECTED CLIMB INTO THE MID 90S MOST PLACES, PUSHING
HEAT INDICES TO 100 DEGREES OR HIGHER. SCATTERED THUNDERSTORMS WILL
DEVELOP IN THE AFTERNOON HEAT, AND SOME OF THESE STORMS MAY BECOME
SEVERE, WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY THREATS.

A COLD FRONT WILL PUSH INTO MIDDLE TENNESSEE TONIGHT, BRINGING
ANOTHER ROUND OF ACTIVE WEATHER TO THE AREA DURING THE EVENING AND
OVERNIGHT HOURS, WITH SOME OF THE STORMS POSSIBLY BECOMING SEVERE
ONCE AGAIN.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER AND EMERGENCY MANAGER ACTIVATION MAY BE NEEDED TODAY AND
TONIGHT.

ROSE

In the hours before

Special weather statement, Jul 22, 10:32 AM CDT, 4 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NASHVILLE TN
1032 AM CDT TUE JUL 22 2008

TNZ006-007-221645-
MONTGOMERY-ROBERTSON-
INCLUDING THE CITIES OF...CLARKSVILLE...SPRINGFIELD
1032 AM CDT TUE JUL 22 2008

THROUGH 1045AM...DUE TO THUNDERSTORMS....LOOK FOR HIGH WINDS OF UP TO
45 MPH TO MOVE ACROSS NORTHEASTERN MONTGOMERY COUNTY AND ALSO
NORTHWESTERN ROBERTSON COUNTY. WINDS OF THIS SPEED COULD BLOW DOWN
SMALL TREES AND TREE LIMBS.

21

Local storm report, Jul 22, 11:21 AM CDT, 3 hours 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1121 AM CDT TUE JUL 22 2008

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

1114 AM     TSTM WND DMG     ORLINDA                 36.60N 86.67W
07/22/2008                   ROBERTSON          TN   OTHER FEDERAL

            TREE BLOWN DOWN IN FRONT OF MAYORS OFFICE

&&

21

Local storm report, Jul 22, 12:09 PM CDT, 2 hours 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
1209 PM CDT TUE JUL 22 2008

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

1133 AM     HAIL             3 NNE PORTLAND          36.63N 86.50W
07/22/2008  E0.88 INCH       SUMNER             TN   PUBLIC

            HAIL REPORTED NEAR THE INTERSECTION OF HWY 259 AND NORTH
            RUSSELL ST

&&

JJLM

Local storm report, Jul 22, 1:39 PM CDT, 1 hour 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
139 PM CDT TUE JUL 22 2008

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

0105 PM     TSTM WND DMG     9 NE SHELBYVILLE        35.58N 86.33W
07/22/2008                   BEDFORD            TN   EMERGENCY MNGR

            TREES DOWN ALONG FAIRFIELD PIKE IN NORTHEAST PART OF
            BEDFORD COUNTY

&&

HSTEIGER

Local storm report, Jul 22, 2:20 PM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NASHVILLE TN
220 PM CDT TUE JUL 22 2008

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

0153 PM     TSTM WND DMG     5 WSW COOKEVILLE        36.13N 85.59W
07/22/2008                   PUTNAM             TN   TRAINED SPOTTER

            TREES DOWN ALONG HOMESTEAD CIRCLE ROAD

&&

STEIGERWALDT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 9:54 AM CDT	Severe Thunderstorm Warning	OHX	Montgomery	36 min
Jul 22, 11:12 AM CDT	Severe Thunderstorm Warning	OHX	Robertson	18 min
Jul 22, 11:31 AM CDT	Severe Thunderstorm Warning	OHX	Sumner	19 min
Jul 22, 12:57 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Cannon, Coffee, Rutherford	48 min
Jul 22, 1:19 PM CDT	Severe Thunderstorm Warning	OHX	Bedford, Coffee	26 min
Jul 22, 1:59 PM CDT	Severe Thunderstorm Warning	OHX	Putnam, White	31 min
Jul 22, 2:27 PM CDT	Severe Thunderstorm Warning	OHX	White	33 min
Jul 22, 2:40 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren, Warren	35 min
Jul 22, 3:03 PM CDT	Severe Thunderstorm Warning	OHX	Van Buren, White	27 min
Jul 22, 5:09 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Lawrence	36 min
Jul 22, 5:38 PM CDT	Severe Thunderstorm Warning	OHX	Giles	37 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2008 Every severe thunderstorm warning in 2008

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.