Alert archive / Tennessee / Flash Flood Warnings in 1998
Flash Flood Warning 5, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Jan 7, 1998, 8:08 PM EST for Sevier County, Tennessee. It was in force for 6 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
- Jan 7, 1998, 8:08 PM EST (01:08 UTC)
- Expired
- Jan 8, 1998, 2:15 AM EST
- In force
- 6 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Sevier County, TN
The radar
The Knoxville radar (KMRX), 44 km from the middle of the area, began a volume at 01:11 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 1.1 hours before the alert went out and 279 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
- 1 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 559 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMRX 080111 FFWMRX TNC155-080715- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KNOXVILLE TRI CITIES TN 808 PM EST WED JAN 7 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE TRI CITIES HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 215 AM EST FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST TENNESSEE ...SEVIER COUNTY AT 805 PM EST REPORTS FROM COUNTY AND CITY OFFICIALS REPORTED THAT FLASH FLOODING WAS BEGINNING TO OCCUR ACROSS MOST OF SEVIER COUNTY. THE WEST PRONG OF THE LITTLE PIGEON RIVER AT THE HOJO BRIDGE WAS AT 11.0 FEET WHICH IS ABOVE FLOOD STAGE. THE WEST PRONG WILL CONTINUE TO RISE DURING THE NEXT FEW HOURS AND SO CONTINUED FLASH FLOODING IS LIKELY ACROSS AREAS CLOSE TO THE WEST PRONG OF THE LITTLE PIGEON RIVER. THE PITTMAN CENTER WAS ALSO BEGINNING TO EXPERIENCE FLASH FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. &
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 Jan 7, 3:00 PM EST, 5 hours 8 minutes earlier.
Area forecast discussion, Jan 7, 3:00 PM EST, 5 hours 8 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 3 PM EST WED JAN 7 1998 ETA TOO FAST W/SYSTEM OVER THE SE. PREFER SLOWER NGM/AVN. BLANKET FFA FOR ALL OF E TN AND CHEROKEE AND CLAY COUNTIES TONIGHT LOOKS GOOD GIVEN THAT SYSTEM IS MOVG XTRMLY SLOW. CRW..WOULD INCLD SW VA AS WELL. SRLY FLOW FM SFC ON UP..DEEP MOISTURE..LIFT..AND GOOD LOW-LVL THETA-E RIDGE OVER CWA COMBINE TO GERNERATE WIDESPREAD MOD TO HVY RAINFALL DURING THE OVRNGT HRS. EVEN THOUGH HEAVIEST RAINFALL WL BE ON THE E SLOPES OF THE MTS IN FAVORED UPSLOPE AREAS..PREV MENTIONED FACTORS WL OVERCOME MUCH OF THE RAIN SHADOW EFFECT. RAIN CHCS SLOWLY DIMINISH FM SW TO NE THURS AS DEEP MOISTURE AND BEST LIFT GRAD SHIFT N & E. WOULD GO FOR LIKELY POPS FOR NE TN/SW VA..GOOD CHC VALLEY & PLATEAU..CHC POPS SE TN/SW NC. CHC POPS STILL NEEDED THURS NGT. UPPER TROF/VORT AXIS PIVOT ACRS CWA & FCST SNDGS SHOW STEEP LAPSE RATE. FRI WL BE A DRY DAY AS A ZONAL hFLOW BEGINS TO DVLP. LOW LVL WRAPAROUND MOISTURE REMAINS HI SO CLDY SKIES WL CONTINUE. FWC/FAN BLEND ON TEMPS PREFERRED. THANKS FOR COORD CALL MEM. HSA
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 7, 8:35 PM EST | Flash Flood Warning | MRX | Cumberland, Fentress | 7 hr |
| Jan 7, 8:35 PM EST | Flash Flood Warning | MRX | Hamilton | 7 hr |
| Jan 7, 9:18 PM EST | Flash Flood Warning | MRX | Carter, Johnson, Unicoi | 6 hr |
| Jan 8, 12:45 AM EST | Flash Flood Warning | MRX | Blount | 3 hr |
| Jan 8, 3:11 AM EST | Flash Flood Warning | MRX | Carter, Johnson, Unicoi | 3 hr |
| Jan 8, 3:11 AM EST | Flash Flood Warning | MRX | Carter, Johnson | 3 hr |
| Jan 8, 3:11 AM EST | Flash Flood Warning | MRX | Unicoi | 3 hr |
| Jan 8, 9:29 AM EST | Flash Flood Warning | MRX | Cocke | 22 hr |
| Jan 8, 5:48 PM EST | Severe Thunderstorm Warning | MRX | Sevier | 42 min |
| Jan 8, 6:22 PM EST | Severe Thunderstorm Warning | MRX | Monroe | 68 min |
| Jan 8, 6:25 PM EST | Severe Thunderstorm Warning | MRX | McMinn | 50 min |
| Jan 8, 6:42 PM EST | Severe Thunderstorm Warning | MRX | Blount | 63 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; radar from the NEXRAD Level II archive.