Alert archive / Tennessee / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 69, NWS Morristown, TN

June 15, 2001Hamilton County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jun 15, 2001, 6:15 PM EDT for Hamilton County, Tennessee. It was in force for 60 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 15, 2001, 6:15 PM EDT (22:15 UTC)
Expired: Jun 15, 2001, 7:15 PM EDT
In force: 60 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Hamilton County, TN

The radar

The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 22:15 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
Jun 15, 6:40 PM EDT	Thunderstorm Wind	Chattanooga, TN	Several trees down.
Jun 15, 6:40 PM EDT	Thunderstorm Wind	Hixon, TN	Trees down.
Jun 15, 6:55 PM EDT	Thunderstorm Wind	Chattanooga, TN	Several trees down, one on a house.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.3 hours before the alert went out and 167 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: 608 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 17 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMRX 152216
SVRMRX
TNC065-152315-
/NEW.KMRX.SV.W.0136.152215-152315/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
615 PM EDT FRI JUN 15 2001

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HAMILTON COUNTY IN EAST TENNESSEE

* UNTIL 715 PM EDT

* AT 610 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR RED BANK...OR 4 MILES NORTH OF
  CHATTANOOGA...MOVING NORTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES SOUTHEAST OF SODDY-DAISY AROUND 620 PM EDT
  SHADY GROVE AROUND 625 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND
  BREAK LIMBS OFF OF TREES ABOUT THE SIZE OF YOUR WRIST.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.
  FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING.

SEEK A STURDY SHELTER IMMEDIATELY

AVOID USING THE TELEPHONE OR OTHER ELECTRICAL EQUIPMENT WHILE
LIGHTNING IS IN THE AREA.

$$

LAT...LON 3504 8535 3503 8505 3530 8498 3543 8515

AUSTIN

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 Morristown, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 1:51 PM EDT, 4 hours 24 minutes earlier.

Area forecast discussion, Jun 15, 1:51 PM EDT, 4 hours 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
151 PM EDT FRI JUN 15 2001

LATEST SURFACE ANALYSIS SHOWS PRE-FRONTAL TROUGH MOVING EAST BETWEEN
JKL AND BNA WITH A BROKEN LINE OF CONVECTION ALONG AND JUST AHEAD OF
THIS BOUNDARY. LATEST MESO-ETA AND RUC SHOWS THIS LINE MOVING INTO
THE PLATEAU LATE THIS AFTERNOON/EARLY EVENING. WILL CALL FOR HIGH
CHANCE OR LIKELY POPS WITH THIS SURFACE TROUGH. AIRMASS AHEAD OF THE
TROUGH IS MODERATELY UNSTABLE WITH CAPES RUNNING BETWEEN 1800-
2500 J/KG WITH LIFTED INDICES OF -4 TO -6. GIVEN DRY INTRUSION AT
500-600 MB...SOME LOCALLY STRONG DOWNBURSTS ARE POSSIBLE WITH THESE
THUNDERSTORMS.  HAIL THREAT IS MINIMAL.  ALSO...LOCALIZED HEAVY
RAINFALL IS POSSIBLE.

FRONT MOVES EAST OF THE AREA SATURDAY MORNING. WILL KEEP A CHANCE OF
SHOWERS AND THUNDERSTORMS EARLY TOMORROW FOR THE NORTHEAST...
OTHERWISE...MODELS SHOW A GOOD DEAL OF DRY AIR MOVING INTO THE
FORECAST AREA. SKIES WILL QUICKLY BECOME MOSTLY SUNNY DURING THE
DAY.

DRY WESTERLY FLOW (PWS BELOW 1 INCH) AND SOME MID-LEVEL WARMING
WILL KEEP CONVECTION FROM DEVELOPING SUNDAY.

FCSTID = 15
CHA   67  88  61  92 /  60   0   0   0
TYS   66  85  60  88 B/  60  10   0   0
TRI   65  80  54  86 /  60  30   0   0
OQT   66  85  60  88 /  60  10   0   0

.MRX...
NC...NONE.
TN...NONE.
VA...NONE.

DH

In the hours before

Special weather statement, Jun 15, 12:17 PM EDT, 5 hours 58 minutes before

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005-
006-008-152100-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
1217 PM EDT FRI JUN 15 2001

...STRONG TO SEVERE THUNDERSTORMS WITH STRONG DAMAGING
WINDS...HAIL AND TORRENTIAL RAINS ARE POSSIBLE LATE THIS AFTERNOON
AND EVENING ACROSS EAST TENNESSEE...SOUTHWEST VIRGINIA AND EXTREME
SOUTHWEST NORTH CAROLINA...

A COOL FRONT WILL MOVE EAST ACROSS WESTERN AND MIDDLE TENNESSEE THIS
AFTERNOON AND COLLIDE WITH THE WARM...MOIST AND UNSTABLE AIR OVER
THE TENNESSEE VALLEY.  THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD
OF THE FRONT AND PUSH EAST ACROSS TENNESSEE MOVING INTO THE PLATEAU
BY LATE THIS AFTERNOON.  GIVEN THE INCREASING INSTABILITY OVER THE
AREA...ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE.  THE
MAIN THREAT FROM THESE STORMS WILL BE DAMAGING THUNDERSTORM WINDS...
HAIL UP TO DIME SIZE...TORRENTIAL RAINS AND DEADLY CLOUD TO GROUND
LIGHTNING.

THE HEAVY RAINS MAY PRODUCE LOCALIZED PONDING OF LOW LYING AREAS
AND STREET FLOODING.

SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS WILL NEED TO
KEEP ABREAST OF THE POTENTIAL OF STRONG TO SEVERE THUNDERSTORMS
L{ATE THIS AFTERNOON AND EVENING.  PLEASE STAY TUNED TO YOUR NOAA
WEATHER RADIO OR FAVORITE RADIO AND TELEVISION STATIONS FOR LATER
STATEMENTS FROM YOUR NATIONAL WEATHER SERVICE.

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 4:58 PM EDT	Severe Thunderstorm Warning	MRX	Marion	62 min
Jun 15, 6:01 PM EDT	Severe Thunderstorm Warning	MRX	Marion	44 min
Jun 15, 7:09 PM EDT	Severe Thunderstorm Warning	MRX	Scott	36 min
Jun 15, 7:16 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	44 min
Jun 15, 7:37 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	38 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2001 Every severe thunderstorm warning in 2001

Sources

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