Alert archive / Tennessee / Special Weather Statements in 2015

Special Weather Statement, NWS Morristown, TN

April 25, 20157 counties in Tennessee

NWS Morristown, TN issued this special weather statement at Apr 25, 2015, 11:10 PM EDT for 7 counties in Tennessee. It was in force for 65 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 25, 2015, 11:10 PM EDT (03:10 UTC)
Expired: Apr 26, 2015, 12:15 AM EDT
In force: 65 min
Issued by: NWS Morristown, TN

Counties Anderson County, TN, Claiborne County, TN, Grainger County, TN, Hancock County, TN, Hawkins County, TN, Knox County, TN, Union County, TN

What was reported inside it

Time	Report	Where	Remark
Apr 26, 12:00 AM EDT	HAIL 1	N Knoxville, TN	NEAR INTERSECTION OF 640 AND BROADWAY.
Apr 26, 12:00 AM EDT	HAIL 1	Nw Knoxville, TN	NEAR INSECTION OF 640 AND WESTERN AVENUE.
Apr 26, 12:02 AM EDT	HAIL 0.5	N Knoxville, TN
Apr 26, 12:17 AM EDT	HAIL 0.5	Knoxville, TN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.2 hours before the alert went out and 264 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: 25 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 2429 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 320 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

967 
WWUS84 KMRX 260310
SPSMRX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1110 PM EDT SAT APR 25 2015
 
TNZ013>016-035>038-069-260415-
CAMPBELL TN-HANCOCK TN-KNOX TN-HAWKINS TN-CLAIBORNE TN-MORGAN TN-
GRAINGER TN-ANDERSON TN-UNION TN-
1110 PM EDT SAT APR 25 2015

...SIGNIFICANT WEATHER ADVISORY FOR CAMPBELL...HANCOCK...KNOX...
HAWKINS...CLAIBORNE...MORGAN...GRAINGER...ANDERSON...AND UNION
COUNTIES UNTIL 1215 AM EDT...

AT 1109 PM EDT...DOPPLER RADAR WAS TRACKING A LINE OF STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES WEST OF
HARROGATE-SHAWANEE TO 7 MILES NORTHWEST OF PIKEVILLE...AND MOVING
EAST AT 45 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
KNOXVILLE...OAK RIDGE...CLINTON...LA FOLLETTE...ROGERSVILLE...
MAYNARDVILLE...SNEEDVILLE...RUTLEDGE...WARTBURG...OLIVER SPRINGS...
NEW TAZEWELL...BEAN STATION...TAZEWELL...PLAINVIEW...JACKSBORO...
SURGOINSVILLE...HARROGATE-SHAWANEE...CHURCH HILL...CARYVILLE AND
HALLS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

THESE STORMS MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM EDT FOR
EAST TENNESSEE.

LAT...LON 3659 8266 3630 8313 3635 8316 3626 8328
      3630 8333 3617 8348 3619 8356 3610 8365
      3611 8365 3612 8367 3609 8366 3608 8371
      3597 8365 3589 8378 3605 8434 3609 8461
      3618 8446 3617 8440 3623 8437 3659 8377
TIME...MOT...LOC 0309Z 280DEG 40KT 3656 8376 3570 8527 

$$

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 10:38 PM EDT	Special Weather Statement	MRX	Campbell, Claiborne, Morgan, Scott	67 min
Apr 25, 11:12 PM EDT	Special Weather Statement	MRX	Rhea	48 min
Apr 25, 11:22 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Morgan, Roane	53 min
Apr 25, 11:27 PM EDT	Severe Thunderstorm Warning	MRX	Claiborne, Hancock, Hawkins	63 min
Apr 26, 12:06 AM EDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Grainger, Jefferson, Knox, Sevier and 1 more	54 min
Apr 26, 12:16 AM EDT	Severe Thunderstorm Warning	MRX	Greene, Hancock, Hawkins, Sullivan, Washington	45 min
Apr 26, 12:47 AM EDT	Special Weather Statement	MRX	McMinn, Monroe	58 min
Apr 26, 12:59 AM EDT	Special Weather Statement	MRX	Blount, Sevier	46 min
Apr 26, 1:36 AM EDT	Special Weather Statement	MRX	McMinn, Meigs, Monroe, Polk	54 min
Apr 25, 8:11 PM EDT	Special Weather Statement	MRX	Wise	49 min
Apr 25, 8:49 PM EDT	Special Weather Statement	MRX	Russell	26 min
Apr 25, 8:57 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Washington	48 min
Apr 25, 9:33 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Washington	24 min
Apr 25, 9:42 PM EDT	Special Weather Statement	MRX	Wise	63 min
Apr 25, 10:44 PM EDT	Special Weather Statement	MRX	Wise, City of Norton	46 min
Apr 25, 10:50 PM EDT	Special Weather Statement	MRX	Russell	40 min
Apr 25, 11:12 PM EDT	Severe Thunderstorm Warning	MRX	Scott, Wise, City of Norton	48 min
Apr 25, 11:31 PM EDT	Severe Thunderstorm Warning	MRX	Russell, Washington	29 min
Apr 25, 11:47 PM EDT	Special Weather Statement	MRX	Russell	43 min
Apr 25, 11:59 PM EDT	Special Weather Statement	MRX	Russell, Wise, City of Norton	46 min
Apr 26, 12:10 AM EDT	Special Weather Statement	MRX	Lee, Scott, City of Norton	35 min

Nearby

Special Weather Statements in Tennessee, 2015 Every special weather statement in 2015

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.