Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 190, NWS Morristown, TN

May 26, 20118 counties in Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 26, 2011, 12:18 PM EDT for 8 counties in Tennessee. It was in force for 42 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: May 26, 2011, 12:18 PM EDT (16:18 UTC)
Expired: May 26, 2011, 1:00 PM EDT
In force: 42 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Anderson County, TN, Blount County, TN, Campbell County, TN, Grainger County, TN, Knox County, TN, Loudon County, TN, Monroe County, TN, Union County, TN

The radar

The Knoxville radar (KMRX), 56 km from the middle of the area, began a volume at 16:18 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 26, 10:15 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 4.3 hours before the alert went out and 231 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: 377 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 298 m²/s²
0-3 km storm-relative helicity: 357 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

526 
WUUS54 KMRX 261618
SVRMRX
TNC001-009-013-057-093-105-123-173-261700-
/O.NEW.KMRX.SV.W.0190.110526T1618Z-110526T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1218 PM EDT THU MAY 26 2011

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANDERSON COUNTY IN EAST TENNESSEE...
  BLOUNT COUNTY IN EAST TENNESSEE...
  CAMPBELL COUNTY IN EAST TENNESSEE...
  GRAINGER COUNTY IN EAST TENNESSEE...
  KNOX COUNTY IN EAST TENNESSEE...
  LOUDON COUNTY IN EAST TENNESSEE...
  MONROE COUNTY IN EAST TENNESSEE...
  UNION COUNTY IN EAST TENNESSEE...

* UNTIL 100 PM EDT

* AT 1208 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF FARRAGUT
  TO MADISONVILLE...AND MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  KNOXVILLE...LA FOLLETTE...ALCOA...MARYVILLE...JACKSBORO...EAGLETON
  VILLAGE...ROYAL BLUE...POWELL...LAKE CITY...DISNEY...CARYVILLE...
  BEARDEN...CITICO BEACH...NORRIS...ELK VALLEY...TALASSEE...CLOVER
  HILL...HALLS...MALONEYVILLE AND FINCASTLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND CENTRAL TENNESSEE.

&&

LAT...LON 3599 8415 3591 8427 3614 8445 3628 8433
      3646 8435 3652 8426 3659 8426 3659 8399
      3640 8390 3627 8401 3619 8395 3612 8401
      3631 8358 3608 8367 3609 8371 3593 8371
      3589 8379 3580 8375 3561 8382 3542 8439
TIME...MOT...LOC 1618Z 241DEG 35KT 3599 8402 3556 8421

$$

GH

1 follow-up statement

238 
WWUS54 KMRX 261642
SVSMRX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1242 PM EDT THU MAY 26 2011

TNC105-123-261649-
/O.CAN.KMRX.SV.W.0190.000000T0000Z-110526T1700Z/
LOUDON TN-MONROE TN-
1242 PM EDT THU MAY 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR MONROE AND LOUDON COUNTIES IS
CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND EAST TENNESSEE.

LAT...LON 3599 8415 3614 8428 3628 8433 3646 8435
      3652 8426 3659 8425 3659 8399 3640 8390
      3628 8401 3619 8395 3613 8400 3631 8358
      3612 8368 3609 8366 3609 8371 3594 8371
      3589 8379 3579 8375 3561 8383 3558 8409
TIME...MOT...LOC 1639Z 241DEG 35KT 3618 8385 3570 8400

$$

TNC001-009-013-057-093-173-261700-
/O.CON.KMRX.SV.W.0190.000000T0000Z-110526T1700Z/
UNION TN-ANDERSON TN-CAMPBELL TN-GRAINGER TN-KNOX TN-BLOUNT TN-
1242 PM EDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM EDT 
FOR PARTS OF BLOUNT...KNOX...GRAINGER...CAMPBELL...ANDERSON AND 
UNION COUNTIES...

AT 1236 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A LINE OF STRONG TO SEVERE THUNDERSTORMS CAPABLE OF 
PRODUCING UP TO QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 
60 MPH.  

THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES 
NORTHWEST OF MALONEYVILLE TO CLOVER HILL...OR ALONG A LINE EXTENDING 
FROM 7 MILES SOUTHWEST OF MAYNARDVILLE TO MARYVILLE...MOVING 
NORTHEAST AT 40 MPH. ONE OF THE STRONGEST STORMS WILL BE MOVING OVER
NORTHERN PARTS OF BLOUNT COUNTY.

LOCATIONS IN THE WARNING INCLUDE...
  MARYVILLE...EAGLETON VILLAGE...WHITE OAK...MALONEYVILLE...LAKE
  FOREST...LUTTRELL...WILDWOOD...MASCOT...WALLAND...BLAINE...
  KIMBERLIN HEIGHTS AND JOPPA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES PRIMARY KILLERS ASSOCIATED
WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE
CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT 
THURSDAY EVENING FOR SOUTHWEST NORTH CAROLINA AND EAST TENNESSEE.

&&

LAT...LON 3599 8415 3614 8428 3628 8433 3646 8435
      3652 8426 3659 8425 3659 8399 3640 8390
      3628 8401 3619 8395 3613 8400 3631 8358
      3612 8368 3609 8366 3609 8371 3594 8371
      3589 8379 3579 8375 3561 8383 3558 8409
TIME...MOT...LOC 1639Z 241DEG 35KT 3618 8385 3570 8400

$$

TG

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 26, 10:11 AM EDT, 2 hours 7 minutes earlier.

Area forecast discussion, May 26, 10:11 AM EDT, 2 hours 7 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
1011 AM EDT THU MAY 26 2011

.DISCUSSION...
DID AN EARLY UPDATE ON FORECAST PACKAGE...SINCE WIND ADVISORY WAS
EXPIRING FOR THE MOUNTAINS AT 10 AM EDT. ALSO...FRESHENED A LOT OF
GRIDS INCLUDING HOURLY AND MAX TEMPS. QUITE AN UNSTABLE AIRMASS
OVER NRN AL INTO SRN MIDDLE TN...SO TWEAKED SEVERE WORDING NOT TO
BE LIMITED TO THIS AFTERNOON.

SEVERE THUNDERSTORM WATCH ABOUT TO BE ISSUED...SO ANOTHER UPDATE OF
ZFP TO FOLLOW WITH WATCH INFORMATION.

&&

.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN             84  61  81  61  90 /  80  50  30  10  10
KNOXVILLE MCGHEE TYSON AIRPORT, TN  86  62  81  61  87 /  70  70  30  10  10
OAK RIDGE, TN                       85  61  79  60  86 /  70  70  30  10  10
TRI CITIES AIRPORT, TN              88  59  81  57  85 /  60  60  60  20  10

&&

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

&&

TG

Hazardous weather outlook, May 26, 2:22 AM EDT, 9 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MORRISTOWN TN
222 AM EDT THU MAY 26 2011

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-270630-
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-
222 AM EDT THU MAY 26 2011 /122 AM CDT THU MAY 26 2011/

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

.DAY ONE...TODAY AND TONIGHT

...SCATTERED SEVERE THUNDERSTORMS EXPECTED TODAY...
A COLD FRONT WILL SLOWLY MOVE ACROSS THE TENNESSEE RIVER VALLEY
TODAY AND TONIGHT...BRINGING A BETTER CHANCE FOR ORGANIZED
THUNDERSTORMS. AS A RESULT...THERE WILL BE A CHANCE FOR WIDESPREAD
SEVERE WEATHER BY THURSDAY AFTERNOON AND EVENING. THE GREATEST
CONCERN WILL BE DAMAGING WINDS AND LARGE HAIL UP TO GOLF-BALL SIZE.
ISOLATED TORNADOES ARE POSSIBLE...MAINLY ACROSS THE PLATEAU AND
WESTERN SECTIONS OF THE TENNESSEE VALLEY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED TODAY AND THIS EVENING.

In the hours before

Local storm report, May 26, 6:56 AM EDT, 5 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
656 AM EDT THU MAY 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 AM     TSTM WND DMG     SUNBRIGHT               36.24N 84.67W
05/26/2011                   MORGAN             TN   LAW ENFORCEMENT

            A FEW TREES DOWN NEAR SUNBRIGHT...TENNESSEE

0350 AM     TSTM WND DMG     CLEVELAND               35.07N 82.53W
05/26/2011                   GREENVILLE         SC   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN NEAR CLEVELAND...TENNESSEE.

&&

DH

Local storm report, May 26, 8:27 AM EDT, 3 hours 51 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE MORRISTOWN TN
827 AM EDT THU MAY 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0350 AM     TSTM WND DMG     CLEVELAND               35.18N 84.87W
05/26/2011                   BRADLEY            TN   LAW ENFORCEMENT

            TREES AND POWER LINES DOWN NEAR CLEVELAND...TENNESSEE.

&&

Local storm report, May 26, 11:46 AM EDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1146 AM EDT THU MAY 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1106 AM     TSTM WND DMG     KINGSTON                35.87N 84.51W
05/26/2011                   ROANE              TN   LAW ENFORCEMENT

            LARGE LIMB AND A FEW POWER LINES DOWN.

&&

Local storm report, May 26, 12:00 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1200 PM EDT THU MAY 26 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1155 AM     HAIL             MADISONVILLE            35.52N 84.36W
05/26/2011  E0.88 INCH       MONROE             TN   LAW ENFORCEMENT

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 1:54 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Hamilton, Marion, Rhea, Sequatchie	66 min
May 26, 2:54 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Scott	66 min
May 26, 3:44 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, McMinn, Meigs, Polk	46 min
May 26, 10:49 AM EDT	Severe Thunderstorm Warning	MRX	Loudon, Meigs, Morgan, Rhea, Roane	26 min
May 26, 11:01 AM EDT	Severe Thunderstorm Warning	MRX	Bledsoe, Marion, Sequatchie	44 min
May 26, 11:07 AM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton, McMinn, Meigs, Polk, Rhea	38 min
May 26, 11:17 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Claiborne, Morgan, Roane, Scott	43 min
May 26, 11:41 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Knox, Loudon, McMinn, Monroe and 3 more	34 min
May 26, 11:51 AM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Roane, Scott	39 min
May 26, 1:02 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Claiborne, Cocke, Grainger, Greene, Hamblen and 6 more	43 min
May 26, 1:33 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, McMinn, Monroe	42 min
May 26, 1:47 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hancock, Hawkins and 5 more	43 min
May 26, 2:03 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Knox, Loudon, Monroe	42 min
May 26, 2:34 PM EDT	Severe Thunderstorm Warning	MRX	Hawkins, Sullivan	26 min
May 26, 2:39 PM EDT	Severe Thunderstorm Warning	MRX	Bradley, Hamilton	35 min
May 26, 2:46 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Grainger, Jefferson, Knox, Sevier	44 min
May 26, 2:56 PM EDT	Severe Thunderstorm Warning	MRX	McMinn	49 min
May 26, 3:28 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Grainger, Greene, Hamblen, Hawkins, Jefferson and 1 more	47 min
May 26, 3:32 PM EDT	Severe Thunderstorm Warning	MRX	Loudon, McMinn, Monroe	43 min
May 26, 4:04 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Loudon	37 min
May 26, 4:07 PM EDT	Severe Thunderstorm Warning	MRX	Monroe	37 min
May 26, 4:14 PM EDT	Severe Thunderstorm Warning	MRX	Grainger, Greene, Hamblen, Hancock, Hawkins, Sullivan and 1 more	46 min
May 26, 4:27 PM EDT	Areal Flood Advisory	MRX	Blount, Bradley, Loudon, McMinn, Monroe, Polk	4 hr
May 26, 4:33 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Monroe	42 min
May 26, 4:33 PM EDT	Tornado Warning	MRX	Greene, Hawkins	12 min
May 26, 4:50 PM EDT	Tornado Warning	MRX	Carter, Greene, Hawkins, Sullivan, Washington	25 min
May 26, 4:56 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Campbell, Morgan, Scott	49 min
May 26, 5:03 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Cocke, Jefferson, Sevier	42 min
May 26, 5:10 PM EDT	Severe Thunderstorm Warning	MRX	Sullivan	50 min
May 26, 5:20 PM EDT	Tornado Warning	MRX	Carter, Johnson, Sullivan, Washington	40 min
May 26, 5:33 PM EDT	Severe Thunderstorm Warning	MRX	Cocke, Greene, Hamblen, Jefferson	42 min
May 26, 5:51 PM EDT	Tornado Warning	MRX	Johnson, Sullivan	39 min
May 26, 6:18 PM EDT	Severe Thunderstorm Warning	MRX	Scott	27 min
May 26, 7:15 PM EDT	Areal Flood Advisory	MRX	Sullivan	3 hr
May 26, 7:52 PM EDT	Areal Flood Advisory	MRX	Campbell, Morgan, Scott	113 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2011 Every severe thunderstorm warning in 2011

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.