Alert archive / Tennessee / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 341, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 14, 1998, 1:34 PM EDT for Scott County, Tennessee. It was in force for 51 min. 1 report 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 14, 1998, 1:34 PM EDT (17:34 UTC)
- Expired
- Jun 14, 1998, 2:25 PM EDT
- In force
- 51 min
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Scott County, TN
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 14, 2:00 PM EDT | Thunderstorm Wind | Huntsville, TN |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 14, 11:30 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 5.6 hours before the alert went out and 191 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.
- Mixed-layer CAPE
- 6 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 813 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 254 m²/s²
- 0-3 km storm-relative helicity
- 350 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 14, 9:40 AM EDT, 3 hours 54 minutes earlier.
Area forecast discussion, Jun 14, 9:40 AM EDT, 3 hours 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 940 AM EDT SUN JUN 14 1998 LATEST SURFACE ANALYSIS SHOWS A WARM FRONT ACDROSS SW TN TO NRN AL TO CENTRAL GA. THIS FRONT WILL LIFT SLOWLY NORTHEAST TODAY MOVING INTO SE TN LATE THIS AFTERNOON. SATELLITE SHOWS A DISTINCT S/WV MOVING EAST ACROSS THE MID-MISSISSIPPI VALLEY WITH DIV ALOFT OVER SRN IL/W KY/SRN IN. THIS UPPER DYNAMICS WILL MOVE ACROSS THE LOWER OHIO VALLEY/NRN TN VALLEY LATER TODAY HELPING TO PRODUCE THUNDERSTORMS ALONG AND NEAR THE WARM FRONT. HELICITIES NEAR THE WRM FRONT ARE PROGGD TO BE BETWEEN 300 AND 500 TODAY AND THIS EVENING WITH INCREASING INSTABILITIES. PER DAY 1 OUTLOOK...I EXPECT A THREAT FOR SEVERE STORMS TO DEVELOP OVER W/MID TN POSSIBLY SE TN LATE THIS AFTERNOON. SOME OF THESE THUNDERSTORMS COULD BECOME SUPERCELL IN STRUCTURE DUE TO THE FAVORABLE LO LVL SHEAR. AS THE STORMS MOVE EAST THE VERTICAL WIND PROFILE BECOMES MORE UNI-DIRECTIONAL. STORMS SHOULD FORM MORE OF A SQUALL LINE AS THEY PROGRESS EAST OVER THE REST OF THE CWA THIS EVENING. STRONG 850 MB JET WILL PRODUCE A THREAT FOR DAMAGING STRAIGHT LINE WINDS. CURRENT FORECAST HIGHS LOOK GOOD... DH
In the hours before
Special weather statement, Jun 14, 11:01 AM EDT, 2 hours 33 minutes before
NCZ060-061-TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005- 006-008-142300- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 1101 AM EDT SUN JUN 14 1998 ...A RISK OF SEVERE THUNDERSTORMS EXISTS THIS AFTERNOON AND EVENING FOR SOUTHWEST VIRGINIA...CUMBERLAND PLATEAU...EAST TENNESSEE AND EXTREME SOUTHWEST NORTH CAROLINA... LATE THIS MORNING...A WARM FRONT WAS LOCATED FROM WESTERN TENNESSEE TO NORTHERN ALABAMA TO CENTRAL GEORGIA. THIS FRONT WILL CONTINUE TO LIFT NORTHEAST TOWARD THE REGION TODAY AND BE LOCATED ACROSS SOUTHEAST TENNESSEE BY EARLY THIS EVENING THEN MOVE NORTH OF THE AREA OVERNIGHT. INCREASING SOUTHERLY WINDS ALONG AND SOUTH OF THE WARM FRONT WILL ALLOW INCREASING WARM...MOIST AND UNSTABLE AIR TO MOVE INTO THE REGION. AT THE SAME TIME...AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE TENNESSEE VALLEY COMBINING FORCES WITH THE APPROACHING WARM FRONT TO PRODUCE SCATTERED THUNDERSTORMS OVER REGION THIS AFTERNOON AND EVENING. DUE TO THE FAVORABLE WINDS ALOFT...SOME OF THESE STORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING. THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS AND LARGE HAIL...BUT ISOLATED TORNADOES ARE POSSIBLE... GENERALLY ALONG AND SOUTH OF INTERSTATE 40. THE INCREASING MOISTURE OVER THE AREA WILL ALSO PRODUCE A THREAT FOR LOCALLIZED FLASH FLOODING. FLOODING OF LOW LYING AREAS...STREET FLOODING...AND RAPID STREAM RISE ARE POSSIBLE. REMEMBER...A SEVERE THUNDERSTORM IS DEFINED AS ANY STORM PRODUCING 3/4 INCH HAIL (DIME-SIZE) OR LARGER...AND/OR WINDS OF 58 MPH OR HIGHER. STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS MAY NEED TO BE ACTIVATED THIS AFTERNOON AND EVENING. RESIDENTS ACROSS THE AREA SHOULD CONTINUE TO MONITOR THE LATEST FORECAST AND LISTEN FOR LATER WEATHER UPDATES FROM YOUR NATIONAL WEATHER SERVICE. DH
Special weather statement, Jun 14, 11:01 AM EDT, 2 hours 33 minutes before
NCZ060-061-TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005- 006-008-142300- AREA THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 1101 AM EDT SUN JUN 14 1998 ...A RISK OF SEVERE THUNDERSTORMS EXISTS THIS AFTERNOON AND EVENING FOR SOUTHWEST VIRGINIA...CUMBERLAND PLATEAU...EAST TENNESSEE AND EXTREME SOUTHWEST NORTH CAROLINA... LATE THIS MORNING...A WARM FRONT WAS LOCATED FROM WESTERN TENNESSEE TO NORTHERN ALABAMA TO CENTRAL GEORGIA. THIS FRONT WILL CONTINUE TO LIFT NORTHEAST TOWARD THE REGION TODAY AND BE LOCATED ACROSS SOUTHEAST TENNESSEE BY EARLY THIS EVENING THEN MOVE NORTH OF THE AREA OVERNIGHT. INCREASING SOUTHERLY WINDS ALONG AND SOUTH OF THE WARM FRONT WILL ALLOW INCREASING WARM...MOIST AND UNSTABLE AIR TO MOVE INTO THE REGION. AT THE SAME TIME...AN UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE TENNESSEE VALLEY COMBINING FORCES WITH THE APPROACHING WARM FRONT TO PRODUCE SCATTERED THUNDERSTORMS OVER REGION THIS AFTERNOON AND EVENING. DUE TO THE FAVORABLE WINDS ALOFT...SOME OF THESE STORMS MAY BECOME SEVERE THIS AFTERNOON AND EVENING. THE MAIN THREAT WILL BE DAMAGING STRAIGHT LINE WINDS AND LARGE HAIL...BUT ISOLATED TORNADOES ARE POSSIBLE... GENERALLY ALONG AND SOUTH OF INTERSTATE 40. THE INCREASING MOISTURE OVER THE AREA WILL ALSO PRODUCE A THREAT FOR LOCALLIZED FLASH FLOODING. FLOODING OF LOW LYING AREAS...STREET FLOODING...AND RAPID STREAM RISE ARE POSSIBLE. REMEMBER...A SEVERE THUNDERSTORM IS DEFINED AS ANY STORM PRODUCING 3/4 INCH HAIL (DIME-SIZE) OR LARGER...AND/OR WINDS OF 58 MPH OR HIGHER. STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT OFFICIALS MAY NEED TO BE ACTIVATED THIS AFTERNOON AND EVENING. RESIDENTS ACROSS THE AREA SHOULD CONTINUE TO MONITOR THE LATEST FORECAST AND LISTEN FOR LATER WEATHER UPDATES 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 14, 12:39 PM EDT | Severe Thunderstorm Warning | MRX | Fentress | 61 min |
| Jun 14, 12:58 PM EDT | Severe Thunderstorm Warning | MRX | Cumberland, Morgan | 62 min |
| Jun 14, 1:44 PM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea, Roane | 61 min |
| Jun 14, 1:44 PM EDT | Severe Thunderstorm Warning | MRX | Anderson | 61 min |
| Jun 14, 5:50 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Polk | 45 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 1998Every severe thunderstorm warning in 1998
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.