Alert archive / Tennessee / Flash Flood Warnings in 1998
Flash Flood Warning 102, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Jul 19, 1998, 6:21 PM EDT for McMinn 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
- Jul 19, 1998, 6:21 PM EDT (22:21 UTC)
- Expired
- Jul 19, 1998, 8:25 PM EDT
- In force
- 2 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
County McMinn County, TN
The radar
The Knoxville radar (KMRX), 137 km from the middle of the area, began a volume at 22:21 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 12:00Z, 10.4 hours before the alert went out and 195 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
- 2747 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1061 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 118 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 192224 FFWMRX TNC107-200025- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 621 PM EDT SUN JUL 19 1998 THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN MCMINN COUNTY IN EASTERN TENNESSEE * UNTIL 825 PM EDT * AT 620 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT A THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED OVER SOUTHERN MCMINN COUNTY...REMAINING NEARLY STATIONARY. * EXCESSIVE RAINFALL AT THE RATE OF IN EXCESS OF 3 INCHES PER HOUR WILL PRODUCE FLOODING ACROSS SOUTHERN MCMINN COUNTY WITH THE HEAVIEST RAIN AROUND CALHOUN THROUGH 825 PM EDT. DON'T DRIVE INTbO AREAS WHERE WATER COVERS THE ROAD! PDK
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 Jul 19, 3:06 PM EDT, 3 hours 15 minutes earlier.
Area forecast discussion, Jul 19, 3:06 PM EDT, 3 hours 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN 306 PM EDT SUN JUL 19 1998 BNDRY SET UP ACRS ERN KY ERLYR...BETW LO CLDS/CLEARING. THIS HAS BEEN SUFFICIENT TO FIRE A QUASISTNRY LINE OF TSTMS...WHICH WITH DRY AIR ALFT HAVE GREAT POTENTIAL FOR DOWNBURSTS AS THEY COLLAPSE. WINDEX FROM MOD SNDG WAS 86 KTS. ANOTHER THRT FROM THESE STORMS...OWING TO WEAK UPR WINDS PARALLEL TO BNDRY...IS HEAVY RAIN. ALREADY SEEING TRAINING ECHOES AND MORE THAN AN INCH PER HOUR AMTS ON RADAR. GOOD NEWS IS THAT THIS EVENT APRS TO BE CONFINED TO THE NE PART OF CWA...ALBEIT BAD NEWS FOR PARCHED LAWNS. CONVECT SHUD BE DECREASING AFT SUNSET...GIVING WAY TO A WARM HAZY NIGHT. COULD BE MUCH MORE DENSE FG IN TRI AREA THAN ANTIC ERLYR...IF SIGNIF PRECIP FALLS. TOMORROW SHUD BE A HOT ONE...BLV CHA WILL BE NR 100 F FOR A MAX. HWVR...OUTFLOW BNDRYS FROM THIS EVE'S CONVECT CUD FIRE ADDL CONVECT FROM TYS NEWD...COOLING THIS AREA BLO GUID. SMH
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 4:23 PM EDT | Severe Thunderstorm Warning | MRX | Hawkins, Sullivan | 47 min |
| Jul 19, 5:10 PM EDT | Severe Thunderstorm Warning | MRX | Carter, Sullivan, Washington | 65 min |
| Jul 19, 5:25 PM EDT | Severe Thunderstorm Warning | MRX | Jefferson, Knox, Sevier | 65 min |
| Jul 19, 5:47 PM EDT | Severe Thunderstorm Warning | MRX | Blount | 48 min |
| Jul 19, 6:06 PM EDT | Severe Thunderstorm Warning | MRX | Hamblen | 49 min |
| Jul 19, 6:45 PM EDT | Severe Thunderstorm Warning | MRX | Monroe | 35 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.