Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 100, NWS Morristown, TN

June 22, 1998Loudon County, Roane County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 22, 1998, 9:38 PM EDT for Loudon County, Roane County, Tennessee. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 22, 1998, 9:38 PM EDT (01:38 UTC)
Expired: Jun 23, 1998, 12:40 AM EDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Whole counties

Counties Loudon County, TN, Roane County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 200 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: 2645 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1476 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

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 flash flood 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 flash flood warning went out at Jun 22, 7:30 PM EDT, 2 hours 8 minutes earlier.

Area forecast discussion, Jun 22, 7:30 PM EDT, 2 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
730 PM EDT MON JUN 22 1998

A COMPLEX OF SHOWERS AND THUNDERSTORMS OVER NRN/ERN KY CONTINUES TO
MOVE EAST SOUTHEAST TOWARD SW VA/NE TN/NRN PLATEAU. AMS ACROSS THE CWA
REMAINS MOIST AND UNSTABLE WITH ADAP DEPICTING LI'S OF -7 TO -9 AND
CAPES RANGING FROM 2500 TO 4000 J/KG. WOULD SUGGEST UPPING POPS TO
LIKELY FOR CSV TO TYS NORTH (INCLUDING SW VA) AND 30 PERCENT FOR SE
TN. ALSO...ADD 20-30 POPS FOR FAR SW NC.

MAIN THREAT FROM THESE STORMS WILL BE TORRENTIAL RAINS/LOCALLIZED
FLASH FLOODING AND DAMAGING DOWNBURSTS WINDS DUE TO THE MID-LVL DRY
AIR. ONLY MARGINAL SVR HAIL ANTICIPATED DUE TO HIGH WBZ. WOULD SUGGEST
INCLUDING LOCALLY HEAVY RAINFALL IN THE PUBLIC FCST.

DH

In the hours before

Local storm report, Jun 22, 8:55 PM EDT, 43 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 8:01 PM EDT	Severe Thunderstorm Warning	MRX	Hancock	64 min
Jun 22, 8:03 PM EDT	Severe Thunderstorm Warning	MRX	Carter	62 min
Jun 22, 8:06 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson	64 min
Jun 22, 8:10 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	65 min
Jun 22, 8:10 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Hamblen, Hawkins	65 min
Jun 22, 8:13 PM EDT	Flash Flood Warning	MRX	Carter	4 hr
Jun 22, 8:26 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, Roane	64 min
Jun 22, 8:31 PM EDT	Severe Thunderstorm Warning	MRX	Cocke	64 min
Jun 22, 8:31 PM EDT	Severe Thunderstorm Warning	MRX	Unicoi, Washington	64 min
Jun 22, 8:39 PM EDT	Severe Thunderstorm Warning	MRX	Knox	66 min
Jun 22, 8:43 PM EDT	Severe Thunderstorm Warning	MRX	Greene	62 min
Jun 22, 8:45 PM EDT	Severe Thunderstorm Warning	MRX	Blount	65 min
Jun 22, 9:16 PM EDT	Severe Thunderstorm Warning	MRX	Carter, Unicoi	64 min
Jun 22, 9:18 PM EDT	Severe Thunderstorm Warning	MRX	Sevier	32 min
Jun 22, 9:21 PM EDT	Severe Thunderstorm Warning	MRX	Johnson	49 min
Jun 22, 9:26 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, Roane	64 min
Jun 22, 9:26 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	64 min
Jun 22, 9:42 PM EDT	Severe Thunderstorm Warning	MRX	Blount	63 min
Jun 22, 9:56 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	64 min
Jun 22, 8:20 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Scott	65 min
Jun 22, 8:50 PM EDT	Severe Thunderstorm Warning	MRX	Washington	65 min

Nearby

Flash Flood Warnings in Tennessee, 1998 Every flash flood 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; the sounding from the Mesonet's radiosonde archive.