Alert archive / Tennessee / Flash Flood Warnings in 1996

Flash Flood Warning 34, NWS Morristown, TN

November 30, 1996Cumberland County, Tennessee

NWS Morristown, TN issued this flash flood warning at Nov 30, 1996, 3:05 PM CST for Cumberland County, Tennessee. It was in force for 115 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Nov 30, 1996, 3:05 PM CST (21:05 UTC)
Expired: Nov 30, 1996, 5:00 PM CST
In force: 115 min
Issued by: NWS Morristown, TN
Area: Whole counties

County Cumberland County, TN

The radar

The Nashville radar (KOHX), 144 km from the middle of the area, began a volume at 21:07 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, 9.1 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 532 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 661 m²/s²
0-3 km storm-relative helicity: 847 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Nov 30, 2:14 PM CST, 51 minutes earlier.

Area forecast discussion, Nov 30, 2:14 PM CST, 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
315 PM EST SAT NOV 30 1996

PLUME OF MOIST AHD OF COLD FNT HAS BLOSSOMED ON SATPIX...AS MAIN TROF
HAS ROTATED INTO S CENT U.S.  ONLY XPCT THINGS TO GET WORSE THRU THE
NITE.  TODAY AN AREA OF LGT-MOD RAIN HAS PERSISTED AND TRAINED OVR
SAME AREA - A LINE FROM NW HSV TO CUMBERLAND GAP.  AMTS UP TO 2.5
INCHES OVR LAST 12 HRS HAVE BEEN REPTD ON IFLOWS GAGE IN CAMPBELL CO.
THE NRN CUMBERLAND PLATEAU WILL BE THE FIRST AREA TO WATCH FOR
FLOODING.  FFA HAS BEEN ISSUED THRU ABT NOON LOCAL TOMORO FOR ALL E
TN.

AS TO THE SYNOPTICS...PARAMS ARE COMING TOGETHER FOR DEEP LIFT BETW 00
AND 06Z TONITE.  SCREAMING 80H JET AND THETAE RIDGE NOSING UP INTO E
TN AT THAT TIME.  WITH FNTL CONV AND STG AGEOS DIV AT 30H LIFTING DEEP
MOIST ALREADY IN PLACE...COULD SEE AN ADDL 2 INCHES SOME AREAS EASILY.
USUAL INTERCEPTION OF MOIST BY CONVECT IN GULF COAST STATES HAS NOT
MATERIALIZED YET.  SO THE GULF IS OPEN FOR SOME BUSINESS WITH TN
TONITE.  ALTHO BEST ISENT LIFT IS TO OUR NORTH...UPR DYNAMICS AND
FNT SHUD BE PLENTY TO GIVE PROLONGED MODERATE RAIN AT THE VERY LEAST.

DESPITE GOOD HELICITY...DON'T SEE ENUF VERT INST FOR MORE THAN<
IMBEDDED TSTMS...MOST OF WHICH WILL BE IN CHA AREA.

GUID TEMPS LUK OK.

SMH

In the hours before

Special weather statement, Nov 30, 1:54 PM CST, 1 hour 11 minutes before

NCZ060-061-TNZ012>018-034>047-066>074-083>087-099>102-VAZ001-002-005-
006-008-010730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
252 PM EST SAT NOV 30 1996

...FLASH FLOOD WATCH FOR EAST TENNESSEE...SOUTHWEST VIRGINIA...SOUTHWEST
NORTH CAROLINA...

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WATCH UNTIL 1230 PM
EST SUNDAY MORNING.

A POTENT STORM SYSTEM AND COLD FRONT MOVING IN FROM THE SOUTHERN PLAINS
IS PUSHING A GREAT DEAL OF MOISTURE AHEAD OF IT.  THIS HAS RESULTED IN
RAINFALL BETWEEN ONE AND TWO INCHES IN THE AREA ALREADY...WITH THE HIGHEST
AMOUNTS IN THE NORTHERN CUMBERLAND PLATEAU.  AS THE FRONT GETS CLOSER
TONIGHT...RAIN WILL BECOME HEAVIER.  THUNDERSTORMS WILL ALSO BREAK
OUT...ESPECIALLY IN SOUTHEAST TENNESSEE.  THIS WILL CREATE LOCALIZED
FLOODING.  THE FRONT SHOULD PASS IN LATE MORNING ON SUNDAY...ENDING THE
HEAVY RAIN BUT NOT THE FLOODING THREAT.

DO NOT ATTEMPT TO CROSS FLOODED STREETS IN A CAR...PARTICULARLY AT NIGHT
WHEN DEPTH IS HARD TO ASSESS.  RESIDENTS OF LOW-LYING AREAS AND NEAR STREAMS
SHOULD BEWARE OF FAST WATER RISES.  STAY TUNED TO NOAA WEATHER RADIO
FOR UPDATES ON THIS SITUATION.

SMH

SMH

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 30, 3:28 PM CST	Flash Flood Warning	MRX	Fentress, Morgan, Scott	3 hr
Nov 30, 3:28 PM CST	Flash Flood Warning	MRX	Campbell, Claiborne	3 hr

Nearby

Flash Flood Warnings in Tennessee, 1996 Every flash flood warning in 1996

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.