Alert archive / Tennessee / Flash Flood Warnings in 1998
Flash Flood Warning 70, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at May 25, 1998, 11:53 PM EDT for Claiborne 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
- May 25, 1998, 11:53 PM EDT (03:53 UTC)
- Expired
- May 26, 1998, 3:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Claiborne County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 3.9 hours before the alert went out and 266 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
- 1955 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1180 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMRX 260353 FFWMRX TNC025-260700- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 1153 PM EDT MON MAY 25 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... CLAIBORNE COUNTY IN EASTERN TENNESSEE * UNTIL 300 AM EDT * AT 1152 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT CLUSTERS OF THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED ACROSS ALL OF CLAIBORNE COUNTY... MOVING EAST AT 30 MPH. * EXCESSIVE RAINFALL AT THE RATE OF 2 INCHES PER HOUR WILL PRODUCE FLOODING ACROSS MOST OF CLAIBORNE COUNTY THROUGH 300 AM EDT. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNI$ZE THE DANGER OF FLOODING.
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 May 25, 7:15 PM EDT, 4 hours 38 minutes earlier.
Area forecast discussion, May 25, 7:15 PM EDT, 4 hours 38 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 715 PM EDT MON MAY 25 1998 AREA WSR-88DS ARE SHOWING AN INCREASE IN INTENSITY AND COVERAGE OF THUNDERSTORMS OVER W/S-CENTRL KY AND W/MID TN. ADAP SHOWS THIS AREA HAVING BEST LO LVL CONVERGENCE AND LIFTED INDICES OF -10 AND -12 AND CAPES OF 3000 J/KG...SO AMS IS VERY UNSTABLE. MODELS ARE DEPICTING STG DIV ALOFT OVER THIS AREA DUE TO THE RIGHT ENTRANCE REGION OF AN 70-90 JET EXITING OVER THE MID-ATLANTIC STATES. MODELS SHOW THE DIV ALOFT MOVING EAST ACROSS THE NRN HALF OF THE CWA DURING THE NIGHT AS WELL AS MODERATELY STG LO LVL CONVERGENCE. I WOULD RECOMMEND UPPING POPS TO AT LEAST 70 PERCENT IF NOT CAT FOR CSV-TYS LINE AND NORTHWARD WITH 50-60 POPS FPR SE TN. GIVEN PWS OF 1.4-1.6 INCHES AND 850 MB DEWPOINTS NEAR 15 DEGREES...HEAVY RAINFALL WILL BE A THREAT WITH LOCAL FLOODING PROBLEMS A CONCERN...ESPECIALLY WHERE TRAINING OCCURS. WINDEX VALUES ALSO SUGGESTS THAT DAMAGING MICRO-BURSTS ARE POSSIBLE WITH THE HIGH CAPE VALUES SUGGESTING SOME STORMS COULD HAVE LARGE HAIL. CURRENT TEMP FCST LOOKS GOOD...EXPECT WOULD SUGGEST DROPPING LOWS FOR SW VA TO NEAR 60. HAVE A GOOD NIGHT... DH
In the hours before
Local storm report, May 25, 11:31 PM EDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
1131 PM EDT MON MAY 25 1998
TIME(EDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1030 PM IN JAMESTOWN TN 0.75 INCH HAIL
05/25/98 FENTRESS DIME SIZE HAIL REPORTED IN
JAMESTOWN. REPORTED BY HAM
RADIO OPERATOR.
1105 PM IN KINGSPORT TN WIND DAMAGE
05/25/98 SULLIVAN TREES AND POWERLINES DOWNED
ACROSS MANY AREAS OF
KINGSPORT. REPORTED BY 911
DISPATCH AND HAM RADIO
OPERATORS.
1115 PM IN KINGSPORT TN WIND DAMAGE
05/25/98 SULLIVAN ROOF BLOWN OFF OF A HOME.
POSSIBLE FUNNEL CLOUD
SIGHTED. REPORTED BY 911
DISPATCH AND HAM RADIO
OPERATORS.
FERRELLLocal storm report, May 25, 11:31 PM EDT, 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
1131 PM EDT MON MAY 25 1998
TIME(EDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1030 PM IN JAMESTOWN TN 0.75 INCH HAIL
05/25/98 FENTRESS DIME SIZE HAIL REPORTED IN
JAMESTOWN. REPORTED BY HAM
RADIO OPERATOR.
1105 PM IN KINGSPORT TN WIND DAMAGE
05/25/98 SULLIVAN TREES AND POWERLINES DOWNED
ACROSS MANY AREAS OF
KINGSPORT. REPORTED BY 911
DISPATCH AND HAM RADIO
OPERATORS.
1115 PM IN KINGSPORT TN WIND DAMAGE
05/25/98 SULLIVAN ROOF BLOWN OFF OF A HOME.
POSSIBLE FUNNEL CLOUD
SIGHTED. REPORTED BY 911
DISPATCH AND HAM RADIO
OPERATORS.
FERRELLThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 10:01 PM EDT | Severe Thunderstorm Warning | MRX | Fentress | 64 min |
| May 25, 10:15 PM EDT | Severe Thunderstorm Warning | MRX | Hancock, Hawkins | 60 min |
| May 25, 10:50 PM EDT | Severe Thunderstorm Warning | MRX | Morgan | 65 min |
| May 25, 10:58 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 62 min |
| May 25, 11:12 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Scott | 63 min |
| May 25, 11:18 PM EDT | Tornado Warning | MRX | Sullivan | 62 min |
| May 25, 11:22 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hancock | 63 min |
| May 25, 11:22 PM EDT | Severe Thunderstorm Warning | MRX | Hawkins | 63 min |
| May 25, 11:39 PM EDT | Severe Thunderstorm Warning | MRX | Knox, Union | 61 min |
| May 25, 11:48 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Johnson | 62 min |
| May 25, 11:49 PM EDT | Severe Thunderstorm Warning | MRX | Cumberland | 46 min |
| May 25, 11:53 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Meigs, Rhea | 62 min |
| May 26, 12:23 AM EDT | Flash Flood Warning | MRX | Hancock, Hawkins | 3 hr |
| May 26, 12:32 AM EDT | Severe Thunderstorm Warning | MRX | Greene, Washington | 48 min |
| May 26, 12:32 AM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 48 min |
| May 26, 12:33 AM EDT | Severe Thunderstorm Warning | MRX | Hawkins | 37 min |
| May 26, 12:37 AM EDT | Severe Thunderstorm Warning | MRX | Hamblen | 48 min |
| May 26, 1:01 AM EDT | Severe Thunderstorm Warning | MRX | Carter, Unicoi | 49 min |
| May 26, 1:05 AM EDT | Flash Flood Warning | MRX | Sullivan | 2 hr |
| May 26, 1:21 AM EDT | Severe Thunderstorm Warning | MRX | Monroe | 49 min |
| May 26, 3:57 PM EDT | Severe Thunderstorm Warning | MRX | Roane | 63 min |
| May 26, 4:14 PM EDT | Severe Thunderstorm Warning | MRX | Campbell | 46 min |
| May 26, 4:24 PM EDT | Severe Thunderstorm Warning | MRX | Loudon | 46 min |
| May 26, 4:30 PM EDT | Severe Thunderstorm Warning | MRX | Union | 50 min |
| May 26, 4:36 PM EDT | Severe Thunderstorm Warning | MRX | Knox | 64 min |
| May 26, 4:58 PM EDT | Severe Thunderstorm Warning | MRX | Blount | 67 min |
| May 26, 5:11 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger | 59 min |
| May 26, 5:34 PM EDT | Severe Thunderstorm Warning | MRX | Hancock | 31 min |
| May 26, 5:41 PM EDT | Severe Thunderstorm Warning | MRX | Sevier | 29 min |
| May 26, 6:01 PM EDT | Severe Thunderstorm Warning | MRX | Jefferson | 49 min |
| May 26, 6:25 PM EDT | Severe Thunderstorm Warning | MRX | Cocke | 65 min |
Nearby
Flash Flood Warnings in Tennessee, 1998Every 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.