Alert archive / Tennessee / Flash Flood Warnings in 1998
Flash Flood Warning 73, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at May 27, 1998, 5:32 AM EDT for Jefferson County, Tennessee. It was in force for 2 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 27, 1998, 5:32 AM EDT (09:32 UTC)
- Expired
- May 27, 1998, 8:00 AM EDT
- In force
- 2 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County Jefferson County, TN
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 9.5 hours before the alert went out and 284 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 881 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 165 m²/s²
- 0-3 km storm-relative helicity
- 301 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 270932 FFWMRX TNC089-271200- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 532 AM EDT WED MAY 27 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN JEFFERSON COUNTY IN EASTERN TENNESSEE * UNTIL 800 AM EDT * AT 530 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT CLUSTERS OF THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED OVER SOUTHERN JEFFERSON COUNTY...MOVING NORTHEAST AT 35 MPH. * EXCESSIVE RAINFALL AT THE RATE OF 1 TO 2 INCHES PER HOUR WILL PRODUCE FLOODING ACROSS SOUTHERN JEFFERSON COUNTY MAINLY TO THE SOUTH OF A DANDRIDGE TO WHITE PINE LINE THROUGH 800 AM EDT. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!
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 27, 2:54 AM EDT, 2 hours 38 minutes earlier.
Area forecast discussion, May 27, 2:54 AM EDT, 2 hours 38 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 254 AM EDT WED MAY 27 1998 ALL THREE MODELS IN FAIRLY CLOSE AGREEMENT WITH THE UPPER LEVEL SHORTWAVE MOVING THROUGH THE AREA BY 00Z TONIGHT. HOWEVER...HAVE LEANED TOWARDS A NGM SOLUTION AS IT HAD A BETTER HANDLE ON THE CURRENT PRECIPITATION. BOTH KMRX AND KHTX SHOWING SHOWERS AND THUNDERSTORMS DEVELOPING ALONG PREVIOUS OUTFLOW BOUNDARIES...AND THE SHORTWAVE MOVING INTO THE AREA. UPPER LEVEL DIVERGENCE IS WELL PRONOUNCED ALSO OVER THE AREA. MAIN CONCERN NOW FOCUSES IN ON FLASH FLOOD POTENTIAL ACROSS THE AREA. PRECIP WATER VALUES SHOW NEAR FLASH FLOOD POTENTIAL...BUT SINCE THE MODELS ARE SHOWING THE SYSTEM TO BE A FAST MOVER...DO NOT THINK FLASH FLOODING WILL BE WIDE SPREAD. THERE IS A GOOD CHANCE THAT SOME AREAS MAY RECIEVE LOCALLY HEAVY RAIN...SO WOULD LIKE TO SEE THAT IN THE ZONES. ATMOSPHERE NOT AS UNSTABLE AS PREVIOUS DAYS...SO SEVERE WEATHER CHANCES ARE SLIGHT. GIVEN THE ABOVE WOULD NOT LIKE TO EXTEND FLASH FLOOD WATCH FOR TODAY. ACROSS THE ENTIRE CWA FOR TODAY WOULD LIKE TO GO WITH LIKELY POPS (60 %) AS PRECIPITATION CONTINUES TO INCREASE IN AREAL COVERAGE...AND UPPER LEVEL SUPPORT MOVES INTO THE AREA AROUND 12Z. RAPID CLEARING TREND IS EXPECTED AFTER SUNSET TODAY...SO WOULD LIKE ZONES WORDED AS FOLLOWS. AM GOING WITH FWC NUMBERS FOR HIGHS AND LOWS. TODAY...MOSTLY CLOUDY WITH A 60 PERCENT CHANCE OF SHOWERS AND THUNDERSTORMS. HIGHS 80 TO 85. SOUTHWEST WIND 5 TO 10 MPH. TONIGHT...DECREASING CLOUDINESS WITH AREAS OF FOG DEVELOPING. LOWS NEAR 60. LIGHT WINDS. --WITH RADITIONAL COOLING AND SIGNIFICANT RAINFALL FOG LIKELY OVERNIGHT-- WEDNESDAY...MOSTLY SUNNY. HIGHS 80 TO 85. LIGHT WINDS. THANKS MEM...FOR COORDINATION CALL... PDK
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 5:52 AM EDT | Flash Flood Warning | MRX | Cocke | 3 hr |
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.