Alert archive / Tennessee / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 23, NWS Morristown, TN

April 7, 2005Anderson County, Morgan County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 7, 2005, 5:47 PM EDT for Anderson County, Morgan County, Tennessee. It was in force for 32 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
Apr 7, 2005, 5:47 PM EDT (21:47 UTC)
Expired
Apr 7, 2005, 6:19 PM EDT
In force
32 min
Issued by
NWS Morristown, TN
Area
Counties, with a storm outline in the text

Counties Anderson County, TN, Morgan County, TN

The radar

The Knoxville radar (KMRX), 92 km from the middle of the area, began a volume at 21:50 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, 9.8 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.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2005-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 83 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, Nashville Metro, TN at 12:00Z on 2005-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 324 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
83 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
633 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
324 m²/s²
0-3 km storm-relative helicity
272 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 severe thunderstorm 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 severe thunderstorm warning went out at Apr 7, 3:26 PM EDT, 2 hours 21 minutes earlier.

Area forecast discussion, Apr 7, 3:26 PM EDT, 2 hours 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
326 PM EDT THU APR 7 2005

.SHORT TERM...(TONIGHT THROUGH FRIDAY)...CONVECTION SLOWLY SPREADING
ACROSS AREA AS UPPER LOW HEADS THIS WAY.  CELLS TRAINING AND CAUSING
HEAVY RAINS AT THIS TIME.  THINK GOOD COVERAGE OF RAINS WILL
CONTINUE INTO THIS EVENING OVER WESTERN PARTS OF AREA...BUT AS
SYSTEM WORKS TO EAST ORGANIZATION AND OVERALL IMPACT WILL LIKELY GET
BROKEN UP AS IT PASSES OVER MOUNTAINS...THINKING SOME DEGREE OF RAIN
SHADOW EFFECT ON OUR SIDE OF SMOKIES.  ALSO LOWER LEVEL MOISTURE
TRANSPORT AND WIND SHEAR IS FORECAST TO SLOWLY DIMINISH AS WELL.  SO
THINKING THAT OVERALL...THE MAIN IMPACTS WILL BE MORE NUMEROUS
BEFORE SUNSET.  NOT PLANNING ANY FLASH FLOOD WATCH FOR TONIGHT.

HAVE MENTIONED THUNDER IN FIRST PERIOD...BUT MAINLY EXPECTING
SHOWERS FOR FRIDAY.  ALSO...AS SYSTEM EXITS AREA...HAVE LOWERED POPS
FOR FRIDAY AFTERNOON.

HAVE RAISED DEW POINT TEMPS ABOUT 2-3 DEGREES OVERALL THROUGHOUT
PERIOD...BUT MADE ONLY A FEW VERY MINOR CHANGES TO TEMP GRIDS.

.LONG TERM...(FRIDAY NIGHT THROUGH THURSDAY)...UPPER LOW FINALLY
DEPARTING AREA ON FRIDAY NIGHT...MAY SEE LINGERING SCATTERED SHOWERS
INTO FRIDAY EVENING.  RIDGE BUILDS IN FOR THE WEEKEND...DRY WEATHER
EXPECTED SATURDAY THROUGH MONDAY.  GFS INDICATING A WARM FRONT
PUSHING INTO AREA MONDAY NIGHT.  WILL DELAY PRECIP UNTIL TUESDAY
WHEN DEEPER MOISTURE ARRIVES...WILL GO WITH CHANCE POPS FOR
TUESDAY.  FRONT STALLS ACROSS AREA ON WEDNESDAY FOLLOWED BY AN UPPER
LOW...WILL KEEP CHANCE POPS GOING ON WEDNESDAY AND THURSDAY.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN  55  70  50  73 /  80  50  10  10
KNOXVILLE MCGHEE TYSON AIRPORT, TN  54  66  49  71 /  80  60  20  10
OAK RIDGE, TN  55  66  48  71 /  80  60  10  10
TRI CITIES AIRPORT, TN  52  65  45  67 /  80  70  30  10

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC......NONE.
TN......NONE.
VA......NONE.

&&

GM/GH
Hazardous weather outlook, Apr 7, 7:30 AM EDT, 10 hours 17 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
730 AM EDT THU APR 7 2005

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005-
006-008-081000-
ANDERSON-BLEDSOE-BLOUNT SMOKY MTN-BRADLEY-CAMPBELL-CHEROKEE-
CLAIBORNE-CLAY-COCKE SMOKY MTN-EAST POLK-GRAINGER-HAMBLEN-HAMILTON-
HANCOCK-HAWKINS-JEFFERSON-JOHNSON-KNOX-LEE-LOUDON-MARION-MCMINN-
MEIGS-MORGAN-NORTH SEVIER-NORTHWEST CARTER-NORTHWEST COCKE-
NORTHWEST GREENE-NORTHWEST MONROE-NW BLOUNT-RHEA-ROANE-RUSSELL-
SCOTT TN-SCOTT VA-SEQUATCHIE-SEVIER SMOKY MTN-SOUTHEAST CARTER-
SOUTHEAST GREENE-SOUTHEAST MONROE-SULLIVAN-UNICOI-UNION-
WASHINGTON TN-WASHINGTON VA-WEST POLK-WISE-
730 AM EDT (630 PM CDT) WED APR 6 2005

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

.DAY ONE (TODAY AND TONIGHT)...

A LOW PRESSURE SYSTEM WILL SLOWLY MOVES EAST SOUTHEAST TO NORTH
GEORGIA BY FRIDAY MORNING. A SERIES OF CONVECTIVE BANDS WILL MOVE
ACROSS THE REGION. SOME OF THESE SHOWERS MAY BE HEAVY AT TIMES.
SMALL HAIL IS POSSIBLE WITH A FEW THUNDERSTORMS.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN (FRIDAY THROUGH WEDNESDAY)...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

PLEASE STAY TUNED TO NOAA WEATHER RADIO OR VISIT OUR WEBSITE AT
WWW.SRH.NOAA.GOV/MRX.

In the hours before

Local storm report, Apr 7, 4:39 PM EDT, 1 hour 8 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 2:51 PM EDTFlash Flood WarningMRXBledsoe, Bradley, Hamilton, Marion, Meigs, Rhea and 1 more4 hr
Apr 7, 4:25 PM EDTSevere Thunderstorm WarningMRXMorgan38 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2005Every severe thunderstorm warning in 2005

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.