Alert archive / Tennessee / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 37, NWS Morristown, TN

May 16, 20104 counties in Tennessee; Lee County, Virginia

NWS Morristown, TN issued this severe thunderstorm warning at May 16, 2010, 2:47 PM EDT for 4 counties in Tennessee; Lee County, Virginia. It was in force for 58 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
May 16, 2010, 2:47 PM EDT (18:47 UTC)
Expired
May 16, 2010, 3:45 PM EDT
In force
58 min
Issued by
NWS Morristown, TN
Area
Storm-based polygon

Counties Claiborne County, TN, Grainger County, TN, Hancock County, TN, Union County, TN, Lee County, VA

The radar

The Knoxville radar (KMRX), 33 km from the middle of the area, began a volume at 18:46 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, 6.8 hours before the alert went out and 283 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 2010-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 214 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 2010-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
214 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 May 16, 1:20 PM EDT, 1 hour 27 minutes earlier.

Area forecast discussion, May 16, 1:20 PM EDT, 1 hour 27 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
120 PM EDT SUN MAY 16 2010

.AVIATION...AREA OF THUNDERSTORMS MOVING NORTHEAST OVER CENTRAL EAST
TENNESSEE. HAVE ISSUED ON SEVERE TSTM WARNING FOR HAIL...WINDS.
EXPECT SOME HEAVY RAINS, AS WELL. ONCE THIS AREA PASSES THERE IS A
GAP BUT ANY SUNSHINE WILL DRIVE FURTHER DEVELOPMENT OF MORE STORMS.
ANY STORMS NEAR AIRFIELDS WILL CAUSE STRONG GUSTY WINDS AND POSSIBLE
HAIL...HEAVY RAINS APPEAR TO BE THE BIGGEST THREAT AT THIS TIME.

EXPECT MVFR CIGS VSBYS WITH STORMS AND DEVELOPMENT OF OVERNIGHT FOG
AS CLOUDS LIFT SOME AND LOW LEVEL MOISTURE COOLS OFF.

&&

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

&&

BB
Hazardous weather outlook, May 16, 4:17 AM EDT, 10 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
417 AM EDT SUN MAY 16 2010

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-170900-
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-
417 AM EDT SUN MAY 16 2010 /317 AM CDT SUN MAY 16 2010/

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

.DAY ONE...TODAY AND TONIGHT

A WEAK FRONTAL BOUNDARY WILL REMAIN OVER THE REGION TODAY AND
TONIGHT. OCCASIONAL SHOWERS AND THUNDERSTORMS CAN BE
EXPECTED...AND A FEW OF THESE THUNDERSTORMS MAY BECOME SEVERE THIS
AFTERNOON WITH DAMAGING WINDS AND LARGE HAIL THE PRIMARY THREATS.
IN ADDITION...VERY HEAVY RAIN WILL BE POSSIBLE...WHICH MAY LEAD TO
LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

SOME SHOWERS AND THUNDERSTORMS WILL CONTINUE TO BE IN THE FORECAST
INTO THE FIRST PART OF THE WEEK. SOME OF THESE THUNDERSTORMS MAY
BECOME SEVERE...ALONG WITH THE POSSIBILITY OF VERY HEAVY RAIN CAUSING
LOCALIZED FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED...ESPECIALLY ON SUNDAY.

In the hours before

Special weather statement, May 16, 11:46 AM EDT, 3 hours 1 minute before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1146 AM EDT SUN MAY 16 2010

TNZ085>087-101-102-161630-
EAST POLK TN-MCMINN TN-NORTHWEST MONROE TN-SOUTHEAST MONROE TN-WEST
POLK TN-
1146 AM EDT SUN MAY 16 2010

...SIGNIFICANT WEATHER ADVISORY FOR POLK...MONROE AND MCMINN COUNTIES
UNTIL 1230 PM EDT...

AT 1142 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
A STRONG THUNDERSTORM 8 MILES EAST OF BENTON...MOVING NORTH AT 30
MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM. FREQUENT LIGHTNING AND HEAVY RAIN ARE ALSO
EXPECTED.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...MADISONVILLE...
SWEETWATER...ETOWAH...BULLET CREEK...ENGLEWOOD...TELLICO PLAINS AND
MOUNT VERNON.

BB
Local storm report, May 16, 2:02 PM EDT, 45 minutes before
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Special weather statement, May 16, 2:23 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
223 PM EDT SUN MAY 16 2010

TNZ014-037-038-069-161915-
CLAIBORNE TN-GRAINGER TN-KNOX TN-UNION TN-
223 PM EDT SUN MAY 16 2010

...SIGNIFICANT WEATHER ADVISORY FOR KNOX...CLAIBORNE...UNION AND
GRAINGER COUNTIES UNTIL 315 PM EDT...

AT 219 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 8 MILES SOUTH OF MAYNARDVILLE...MOVING NORTHEAST
AT 20 MPH.

SMALL HAIL AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS
STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...MAYNARDVILLE...
BLAINE...LUTTRELL...ROSE HILL...JOPPA...SHARPS CHAPEL...SANDLICK...
LONE MOUNTAIN AND SPRINGDALE.

STAY IN A STRONG BUILDING AWAY FROM WINDOWS. DO NOT CROSS FLOODED
ROADS. TURN AROUND...DON'T DROWN.

BB
Special weather statement, May 16, 2:25 PM EDT, 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
225 PM EDT SUN MAY 16 2010

TNZ040-070-073-161915-
JEFFERSON TN-NORTH SEVIER TN-NORTHWEST COCKE TN-
225 PM EDT SUN MAY 16 2010

...SIGNIFICANT WEATHER ADVISORY FOR SEVIER...EXTREME WESTERN COCKE
AND JEFFERSON COUNTIES UNTIL 315 PM EDT...

AT 223 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR SEVIERVILLE...MOVING NORTHEAST AT 15 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE
POSSIBLE WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...DANDRIDGE...BIRD
CROSSING AND CHESTNUT HILL.

TD

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 8:18 PM EDTSevere Thunderstorm WarningMRXAnderson, Knox42 min
May 15, 8:22 PM EDTAreal Flood AdvisoryMRXAnderson, Knox3 hr
May 16, 1:05 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, Monroe40 min
May 16, 1:38 PM EDTAreal Flood AdvisoryMRXAnderson, Blount, Campbell, Knox, Loudon, Scott and 1 more112 min
May 16, 2:46 PM EDTAreal Flood AdvisoryMRXClaiborne, Grainger, Knox, Sevier, Union119 min
May 16, 3:16 PM EDTAreal Flood AdvisoryMRXClaiborne, Cocke, Grainger, Greene, Hamblen, Hancock and 3 more3 hr
May 16, 3:27 PM EDTAreal Flood AdvisoryMRXBlount, Bradley, McMinn, Monroe, Polk3 hr
May 16, 3:41 PM EDTSevere Thunderstorm WarningMRXHancock64 min
May 16, 3:45 PM EDTSevere Thunderstorm WarningMRXCocke, Greene60 min
May 16, 3:46 PM EDTAreal Flood AdvisoryMRXCarter, Greene, Hawkins, Johnson, Sullivan, Unicoi and 1 more3 hr
May 16, 4:07 PM EDTSevere Thunderstorm WarningMRXBradley, McMinn, Polk38 min
May 16, 4:22 PM EDTSevere Thunderstorm WarningMRXCarter, Greene, Sullivan, Unicoi, Washington53 min
May 16, 4:29 PM EDTSevere Thunderstorm WarningMRXMcMinn, Monroe, Polk46 min
May 16, 5:03 PM EDTSevere Thunderstorm WarningMRXBlount, Loudon, Monroe42 min
May 16, 5:17 PM EDTSevere Thunderstorm WarningMRXCarter, Johnson, Sullivan, Washington58 min
May 16, 6:12 PM EDTSevere Thunderstorm WarningMRXJohnson, Sullivan63 min
May 16, 6:46 PM EDTAreal Flood AdvisoryMRXCarter, Johnson, Sullivan59 min
May 16, 12:55 PM EDTAreal Flood AdvisoryMRXWise, City of Norton3 hr
May 16, 1:56 PM EDTFlash Flood WarningMRXWise, City of Norton2 hr
May 16, 3:38 PM EDTFlash Flood WarningMRXLee, Scott, Wise, City of Norton3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2010Severe Thunderstorm Warnings in Virginia, 2010Every severe thunderstorm warning in 2010

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.