Alert archive / Tennessee / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 252, NWS Morristown, TN

July 10, 2003Bradley County, McMinn County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Jul 10, 2003, 6:31 PM EDT for Bradley County, McMinn County, Tennessee. It was in force for 44 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 10, 2003, 6:31 PM EDT (22:31 UTC)
Expired: Jul 10, 2003, 7:15 PM EDT
In force: 44 min
Issued by: NWS Morristown, TN
Area: Counties, with a storm outline in the text

Counties Bradley County, TN, McMinn County, TN

The radar

The Northeast Alabama radar (KHTX), 128 km from the middle of the area, began a volume at 22:34 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
Jul 10, 5:50 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.5 hours before the alert went out and 189 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: 1671 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMRX 102231
SVRMRX
TNC011-107-102315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
631 PM EDT THU JUL 10 2003

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BRADLEY COUNTY IN EAST TENNESSEE
  MCMINN COUNTY IN EAST TENNESSEE

* UNTIL 715 PM EDT

* AT 629 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES NORTH OF HOPEWELL...OR 10 MILES NORTH
  OF CLEVELAND...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  6 MILES SOUTH OF HILLSVIEW AROUND 635 PM EDT
  CHARLESTON AROUND 645 PM EDT
  8 MILES SOUTH OF RICEVILLE AROUND 650 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING...
  WINDS UP TO 60 MPH...WHICH COULD PUSH OVER SHALLOW ROOTED TREES AND
  BREAK TREE LIMBS ABOUT THE SIZE OF YOUR WRIST.
  HAIL UP TO 1 INCH IN DIAMETER...OR THE SIZE OF QUARTERS.
  VERY HEAVY RAINFALL WHICH MAY CAUSE LOCALIZED FLOODING.
  FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING.

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

LAT...LON 3540 8462 3526 8468 3516 8472 3526 8499
          3537 8485 3541 8484

$$

LCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 8:25 PM EDT	Severe Thunderstorm Warning	MRX	Knox	50 min
Jul 10, 5:10 PM EDT	Severe Thunderstorm Warning	MRX	Morgan, Scott	65 min
Jul 10, 5:15 PM EDT	Severe Thunderstorm Warning	MRX	Bledsoe	45 min
Jul 10, 5:36 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Roane	39 min
Jul 10, 5:44 PM EDT	Severe Thunderstorm Warning	MRX	Sequatchie	31 min
Jul 10, 6:00 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton, Meigs	45 min
Jul 10, 6:03 PM EDT	Severe Thunderstorm Warning	MRX	Marion	42 min
Jul 10, 6:11 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Hancock	64 min
Jul 10, 6:17 PM EDT	Severe Thunderstorm Warning	MRX	Knox, Loudon, Union	58 min
Jul 10, 6:43 PM EDT	Severe Thunderstorm Warning	MRX	Blount	62 min
Jul 10, 6:45 PM EDT	Severe Thunderstorm Warning	MRX	Hamilton	30 min
Jul 10, 6:52 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	38 min
Jul 10, 6:56 PM EDT	Severe Thunderstorm Warning	MRX	Grainger	64 min
Jul 10, 7:14 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins	61 min
Jul 10, 7:20 PM EDT	Severe Thunderstorm Warning	MRX	Polk	55 min
Jul 10, 7:22 PM EDT	Severe Thunderstorm Warning	MRX	Hamblen, Jefferson, Sevier	53 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2003 Every severe thunderstorm warning in 2003

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.