Alert archive / Tennessee / Flash Flood Warnings in 2000

Flash Flood Warning 7, NWS Morristown, TN

July 11, 2000Blount County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jul 11, 2000, 7:43 PM EDT for Blount County, Tennessee. It was in force for 3 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 11, 2000, 7:43 PM EDT (23:43 UTC)
Expired: Jul 11, 2000, 10:45 PM EDT
In force: 3 hr
Issued by: NWS Morristown, TN
Area: Whole counties

County Blount County, TN

The radar

The Knoxville radar (KMRX), 71 km from the middle of the area, began a volume at 23:45 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, 11.7 hours before the alert went out and 246 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2558 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 914 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KMRX 112352
FFWMRX
TNC009-120245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
743 PM EDT TUE JUL 11 2000

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BLOUNT COUNTY IN EASTERN TENNESSEE

* UNTIL 1045 PM EDT

* AT 735 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS WITH VERY HEAVY RAIN NEAR WALLAND...OR 7 MILES   
SOUTHEAST OF MARYVILLE. THUNDERSTORMS CONTINUE TO DEVELOP NORTHWEST 
OF THE REGION WITH SOUTHEAST MOVEMENT AT 15 MPH. 
THEREFORE...ADDITIONAL HEAVY RAIN IS POSSIBLE OVER BLOUNT COUNTY 
DURING THE NEXT THREE HOURS.

* LOCATIONS IN THE WARNING INCLUDE...
  ALCOA...MARYVILLE...TOWNSEND...CADES COVE

AT 735 PM EDT A TRAINED AMATEUR RADIO WEATHER SPOTTER REPORTED 1.73 
INCHES OF RAIN FELL IN FIVE MINUTES WITH THE PASSAGE OF A STRONG 
STORM OVER THE CITY OF MARYVILLE.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

$$

LAT...LON 3588 8400 3584 8401 3585 8403 3583 8405
          3584 8410 3573 8416 3563 8412 3550 8399
          3553 8381 3557 8376 3557 8368 3569 8367
          3588 8379 3584 8386

The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 11, 2:12 AM EDT	Severe Thunderstorm Warning	MRX	Sullivan	33 min
Jul 11, 2:12 AM EDT	Severe Thunderstorm Warning	MRX	Johnson	33 min
Jul 11, 6:19 PM EDT	Flash Flood Warning	MRX	Greene	3 hr
Jul 11, 7:07 PM EDT	Severe Thunderstorm Warning	MRX	Blount	23 min
Jul 11, 7:30 PM EDT	Severe Thunderstorm Warning	MRX	Blount	45 min

Nearby

Flash Flood Warnings in Tennessee, 2000 Every flash flood warning in 2000

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.