Alert archive / Tennessee / Flash Flood Warnings in 1990
Flash Flood Warning 1, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Dec 23, 1990, 1:21 AM CST for Cumberland County, Morgan County, Roane County, Tennessee. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Dec 23, 1990, 1:21 AM CST (07:21 UTC)
- Expired
- Dec 23, 1990, 5:30 AM CST
- In force
- 4 hr
- Issued by
- NWS Morristown, TN
- Area
- Whole counties
Counties Cumberland County, TN, Morgan County, TN, Roane County, TN
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 7.4 hours before the alert went out and 170 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
- 464 m above ground
- 0-6 km bulk shear
- 94 kt
- 0-1 km storm-relative helicity
- 325 m²/s²
- 0-3 km storm-relative helicity
- 347 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 KTYS 230733 COR FFWTYS TNC035-129-145-231130- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING...CORRECTED... NATIONAL WEATHER SERVICE KNOXVILLE TN 221 AM EST (121 AM CST) SUN DEC 23 1990 THE NATIONAL WEATHER SERVICE IN KNOXVILLE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 630 AM EST (530 AM CST) FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL TENNESSEE ...CUMBERLAND COUNTY...MORGAN COUNTY...ROANE COUNTY NUMEROUS COUNTY ROADS AND SOME STATE ROADS HAVE STANDING WATER WITH A FEW COUNTY ROADS BEING WASHED OUT...ESPECIALLY IN ROANE AND MORGAN COUNTIES. EVACUATION HAS TAKEN PLACE IN THE OAKDALE AREA ALONG HIGHWAY 299 IN MORGAN COUNTY. PETERS FORD ROAD HAS BEEN CLOSED IN MORGAN COUNTY. IN ROANE COUNTY SEVERAL STREETS IN ROCKWOOD ARE FLOODED AND HIGHWAY 61 NORTH OF HARRIMAN HAS STANDING WATER. HIGHWAY 58 6 TO 8 MILES SOUTH OF KINGSTON IS FLOODED. OLD HARRIMAN HIGHWAY AND OLLIS ROAD HAS CAVED IN IN SPOTS. RESIDENTS CAN EXPECT 2 TO 3 HOURS MORE OF MODERATE TO OCCASIONALLY HEAVY RAIN. IF YOU ARE IN A FLOOD PRONE AREA MOVE TO HIGHER GROUND. 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. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. ...CORRECTION WAS FOR OAKDALE (AREA) IN MORGAN COUNTY...
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.
In the hours before
Special weather statement, Dec 22, 7:38 PM CST, 5 hours 43 minutes before
TNZ001-002-003-004-005-008-016-230445- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KNOXVILLE TN 837 PM EST (737 PM CST) SAT DEC 22 1990 ...A FLASH FLOOD WATCH IS IN EFFECT FOR EAST TENNESSEE FOR TONIGHT... SHOWERS AND THUNDERSHOWERS CONTINUE OVER EAST TENNESSEE. RAINFALL AMOUNTS OF 1 TO 3 INCHES HAVE OCCURRED ACROSS PORTIONS OF EAST TENNESSEE IN THE PAST 24 HOURS. THIS HAS SATURATED THE GROUND AND CAUSED THE RUNOFF INTO STREAMS AND RIVERS TO BE GREATER THEN NORMAL. SOME WIDELY SCATTERED REPORTS OF STREAMS OVER THEIR BANKS AND OF A MUD SLIDE HAVE BEEN REPORTED IN CUMBERLAND COUNTY. WITH ADDITIONAL RAINFALL MANY SMALL STREAMS WILL BE AT BANKFULL LEVELS. MOTORISTS ARE URGED TO USE CAUTION AND BE ALERT FOR WATER ON ROADWAYS. DO NOT ATTEMPT TO CROSS ROADS THAT HAVE RUNNING WATER ACROSS THEM. EAST TENNESSEE IS IN STORE FOR A SIGNIFICANT WEATHER CHANGE IN THE NEXT 48 HOURS. BY SUNDAY AFTERNOON TEMPERATURES WILL START TO FALL AND WINTER WILL BE UPON US. AFTER A HIGH TEMPERATURE OF 60 TODAY... WE CAN EXPECT ONLY A HIGH IN THE LOW 30S ON MONDAY. LOW TEMPERATURES IN THE TEENS CAN BE EXPECTED MONDAY AND TUESDAY NIGHT. WE MAY NOT HAVE A WHITE CHRISTMAS BUT BY-GOLLY WE WILL HAVE A COLD ONE.
Special weather statement, Dec 22, 8:15 PM CST, 5 hours 6 minutes before
TNZ001-002-003-004-005-008-016-230415- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KNOXVILLE TN 914 PM EST (814 PM CST) SAT DEC 22 1990 ...A FLASH FLOOD WATCH IS IN EFFECT FOR EAST TENNESSEE FOR TONIGHT... AT 9 PM EST THE TENNESSEE HIGHWAY PATROL HAS REPORTED THAT WATER IS RUNNING ACROSS STATE HIGHWAY 27 NORTH OF HARRIMAN IN ROANE COUNTY AND THERE IS STANDING WATER ON SECTIONS OF STATE HIGHWAY 61 NEAR OLIVER SPRINGS ON THE ANDERSON AND ROANE COUNTY LINE. IN SOUTHEAST TENNESSEE MOST COUNTIES AROUND CHATTANOOGA HAVE ROAD FLOODING AND EVEN SOME BRIDGES ARE FLOODED. STATY TUNED TO THE NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 3:37 AM CST | Flash Flood Warning | MRX | Claiborne, Union | 3 hr |
| Dec 23, 4:32 AM CST | Flash Flood Warning | MRX | Blount, Knox | 3 hr |
| Dec 23, 9:30 AM CST | Flash Flood Warning | MRX | Blount, Sevier | 2 hr |
| Dec 23, 2:05 PM CST | Flash Flood Warning | MRX | Blount, Sevier | 3 hr |
Nearby
Flash Flood Warnings in Tennessee, 1990Every flash flood warning in 1990
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.