Alert archive / Tennessee / Flash Flood Warnings in 1998
Flash Flood Warning 7, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Jan 7, 1998, 8:35 PM EST for Hamilton County, Tennessee. It was in force for 7 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, 8:35 PM EST (01:35 UTC)
- Expired
- Jan 8, 1998, 3:30 AM EST
- In force
- 7 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Hamilton County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 167 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 080139 FFWMRX TNC035-049-065-080830- BULLETIN - EAS ACTIVATION REQUESTED FLOOD WARNING NATIONAL WEATHER SERVICE KNOXVILLE TRI CITIES TN 835 PM EST (735 PM CST) WED JAN 7 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE TRI CITIES HAS ISSUED A FLOOD WARNING EFFECTIVE UNTIL 330 AM EST (230 AM CST) FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST TENNESSEE ...CUMBERLAND COUNTY...FENTRESS COUNTY...HAMILTON COUNTY THE FLOOD WARNING FOR CUMBERLAND...FENTRESS AND HAMILTON COUNTIES HAS BEEN EXTENDED UNTIL 330 AM EST (230 AM CST). COUNTY OFFICIALS STILL REPORT THAT MANY ROADS WITHIN THESE COUNTIES REMAIN UNDER WATER AND CLOSED. ALTHOUGH THE HEAVIEST RAIN HAS ENDED FOR NOW THERE IS MORE RAIN DEVELOPING IN ALABAMA AND MAY AFFECT THESE AREAS AFTER MIDNIGHT. THEREFORE CONTINUED FLOODING PROBLEMS ARE A GOOD POSSIBILITY ACROSS THESE COUNTIES OVERNIGHT. 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. THE FLOOD WARNING FOR BRADLEY...CAMPBELL...MCMINN...MEIGS...MORGAN... RHEA...ROANE AND SCOTT COUNTIES HAS EXPIRED. &
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 35 minutes earlier.
Area forecast discussion, Jan 7, 3:00 PM EST, 5 hours 35 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, 8:08 PM EST | Flash Flood Warning | MRX | Sevier | 6 hr |
| Jan 7, 8:35 PM EST | Flash Flood Warning | MRX | Cumberland, Fentress | 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.