Alert archive / Tennessee / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 13, NWS Morristown, TN

April 22, 2016Cocke County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at Apr 22, 2016, 4:56 PM EDT for Cocke County, Tennessee. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 22, 2016, 4:56 PM EDT (20:56 UTC)
Expired: Apr 22, 2016, 5:18 PM EDT
In force: 22 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Cocke County, TN

The radar

The Knoxville radar (KMRX), 44 km from the middle of the area, began a volume at 20:57 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 8.9 hours before the alert went out and 298 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: 115 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

935 
WUUS54 KMRX 222056
SVRMRX
TNC029-222145-
/O.NEW.KMRX.SV.W.0013.160422T2056Z-160422T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
456 PM EDT FRI APR 22 2016

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN COCKE COUNTY IN EASTERN TENNESSEE...

* UNTIL 545 PM EDT

* AT 455 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR PIGEON FORGE...
  OR NEAR SEVIERVILLE...MOVING EAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  HARTFORD AND COSBY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3580 8329 3582 8328 3581 8327 3583 8326
      3584 8328 3587 8329 3587 8331 3589 8332
      3592 8329 3586 8301 3579 8296 3577 8300
      3579 8303 3579 8308 3577 8311 3577 8316
      3573 8320 3571 8327
TIME...MOT...LOC 2055Z 285DEG 25KT 3584 8349 

HAIL...1.25IN
WIND...60MPH
 
$$

05/MA

1 follow-up statement

402 
WWUS54 KMRX 222118
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
518 PM EDT FRI APR 22 2016

TNC029-222127-
/O.CAN.KMRX.SV.W.0013.000000T0000Z-160422T2145Z/
COCKE TN-
518 PM EDT FRI APR 22 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN COCKE COUNTY IS
CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER SMALL HAIL IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 3580 8329 3582 8328 3581 8327 3583 8326
      3584 8328 3587 8329 3587 8331 3589 8332
      3592 8329 3586 8301 3579 8296 3577 8300
      3579 8303 3579 8308 3577 8311 3577 8316
      3573 8320 3571 8327
TIME...MOT...LOC 2116Z 285DEG 25KT 3580 8331 

$$

05/MA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 3:17 PM EDT	Special Weather Statement	MRX	Anderson, Knox	43 min
Apr 22, 3:23 PM EDT	Special Weather Statement	MRX	Loudon	52 min
Apr 22, 3:47 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Sevier	43 min
Apr 22, 3:51 PM EDT	Special Weather Statement	MRX	Knox	24 min
Apr 22, 4:03 PM EDT	Special Weather Statement	MRX	Knox	42 min
Apr 22, 4:18 PM EDT	Special Weather Statement	MRX	Jefferson, Sevier	12 min
Apr 22, 4:23 PM EDT	Severe Thunderstorm Warning	MRX	Jefferson, Sevier	52 min
Apr 22, 4:40 PM EDT	Special Weather Statement	MRX	McMinn, Monroe	50 min
Apr 22, 5:04 PM EDT	Special Weather Statement	MRX	Blount	41 min
Apr 22, 5:22 PM EDT	Special Weather Statement	MRX	Bradley, Polk	38 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2016 Every severe thunderstorm warning 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.