Alert archive / Tennessee / Flash Flood Watches in 2016

Flash Flood Watch 1, NWS Morristown, TN

February 23, 20164 counties in Tennessee; Cherokee County, Clay County, North Carolina

NWS Morristown, TN issued this flash flood watch at Feb 23, 2016, 3:31 AM EST for 4 counties in Tennessee; Cherokee County, Clay County, North Carolina. It took effect at Feb 23, 2016, 6:00 PM EST. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued
Feb 23, 2016, 3:31 AM EST (08:31 UTC)
In effect from
Feb 23, 2016, 6:00 PM EST
Expired
Feb 24, 2016, 10:57 AM EST
In force
17 hr
Issued by
NWS Morristown, TN
Flood severity
None

Counties Cherokee County, NC, Clay County, NC, Bradley County, TN, Hamilton County, TN, Marion County, TN, Polk County, TN

The radar

The Northeast Alabama radar (KHTX), 131 km from the middle of the area, began a volume at 08:33 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

Birmingham, AL (KBMX), launched 00:00Z, 8.5 hours before the alert went out and 291 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2016-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 52 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2016-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 152 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
52 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
152 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Feb 23, 3:28 AM EST, 3 minutes earlier.

Area forecast discussion, Feb 23, 3:28 AM EST, 3 minutes before
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Hazardous weather outlook, Feb 22, 3:00 PM EST, 12 hours 31 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
300 PM EST MON FEB 22 2016

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-232000-
CHEROKEE-CLAY-SCOTT TN-CAMPBELL-CLAIBORNE-HANCOCK-HAWKINS-
SULLIVAN-JOHNSON-MORGAN-ANDERSON-UNION-GRAINGER-HAMBLEN-
NORTHWEST COCKE-COCKE SMOKY MOUNTAINS-NORTHWEST GREENE-
SOUTHEAST GREENE-WASHINGTON TN-UNICOI-NORTHWEST CARTER-
SOUTHEAST CARTER-ROANE-LOUDON-KNOX-JEFFERSON-NW BLOUNT-
BLOUNT SMOKY MOUNTAINS-NORTH SEVIER-SEVIER SMOKY MOUNTAINS-
SEQUATCHIE-BLEDSOE-RHEA-MEIGS-MCMINN-NORTHWEST MONROE-
SOUTHEAST MONROE-MARION-HAMILTON-BRADLEY-WEST POLK-EAST POLK-LEE-
WISE-SCOTT-RUSSELL-WASHINGTON-
300 PM EST MON FEB 22 2016 /200 PM CST MON FEB 22 2016/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH
CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA.

.DAY ONE...TONIGHT AND TUESDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH MONDAY...

...STRONG AND GUSTY WINDS FOR MOUNTAINS AND ADJACENT FOOTHILLS FOR
TUESDAY NIGHT AND WEDNESDAY MORNING...
...SHOWERS AND THUNDERSTORMS WITH STRONG AND GUSTY WINDS EXPECTED
WEDNESDAY...

LATE TUESDAY NIGHT THROUGH WEDNESDAY STRONG AND GUSTY WINDS WILL BE
MOVING INTO THE AREA...ESPECIALLY ACROSS THE SOUTHERN APPALACHIAN
MOUNTAINS AND ADJACENT FOOTHILLS OF EAST TENNESSEE. SOUTHERLY WINDS
OF 30 TO 50 MPH WITH GUSTS IN EXCESS OF 65 MPH ARE ANTICIPATED.

ADDITIONALLY...SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS
SOUTHEAST TENNESSEE EARLY WEDNESDAY MORNING...THEN MOVE QUICKLY
NORTHEAST ACROSS THE REST OF THE AREA DURING THE DAY. STRONG AND
GUSTY WINDS...WITH LOCALIZED DAMAGING WINDS ARE EXPECTED. THERE IS
A LOW CHANCE OF A TORNADO ACROSS SOUTHEAST TENNESSEE EARLY
WEDNESDAY MORNING.

BEST THE STRONG STORMS...HEAVY RAINFALL IS POSSIBLE WITH THE
STRONGER STORMS WITH LOCALIZED FLOODING POSSIBLE ACROSS THE
SOUTHERN PLATEAU..SOUTHEAST TENNESSEE AND SOUTHWEST NORTH CAROLINA.

BY WEDNESDAY NIGHT...COLDER AIR WILL BE MOVING INTO THE
REGION...CHANGING RAIN SHOWERS TO SNOW SHOWERS. THERE IS A CHANCE
OF SOME SNOW ACCUMULATIONS MAINLY IN THE SOUTHERN APPALACHIAN
MOUNTAINS AS WELL AS NORTHEAST TENNESSEE AND SOUTHWEST VIRGINIA
LATE WEDNESDAY NIGHT THROUGH THURSDAY AND INTO THURSDAY NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 23, 3:38 PM ESTHigh Wind WarningMRXBlount, Carter, Cocke, Greene, Johnson, McMinn and 5 more21 hr
Feb 23, 3:38 PM ESTWind AdvisoryMRXAnderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more33 hr

Nearby

Flash Flood Watches in Tennessee, 2016Flash Flood Watches in North Carolina, 2016Every flash flood watch in 2016

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.