Alert archive / Tennessee / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 192, NWS Morristown, TN

May 26, 2011Loudon County, McMinn County, Monroe County, Tennessee

NWS Morristown, TN issued this severe thunderstorm warning at May 26, 2011, 1:33 PM EDT for Loudon County, McMinn County, Monroe County, Tennessee. It was in force for 42 min. 1 report 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: May 26, 2011, 1:33 PM EDT (17:33 UTC)
Expired: May 26, 2011, 2:15 PM EDT
In force: 42 min
Issued by: NWS Morristown, TN
Area: Storm-based polygon

Counties Loudon County, TN, McMinn County, TN, Monroe County, TN

The radar

The Knoxville radar (KMRX), 110 km from the middle of the area, began a volume at 17:35 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.

What was reported inside it

Time	Report	Where	Remark
May 26, 1:45 PM EDT	HAIL 1	Madisonville, TN

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 12 minutes after it went out.

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, 5.6 hours before the alert went out and 215 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.

538 
WUUS54 KMRX 261733
SVRMRX
TNC105-107-123-261815-
/O.NEW.KMRX.SV.W.0192.110526T1733Z-110526T1815Z/

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

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LOUDON COUNTY IN EAST TENNESSEE...
  MCMINN COUNTY IN EAST TENNESSEE...
  MONROE COUNTY IN EAST TENNESSEE...

* UNTIL 215 PM EDT

* AT 126 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  ETOWAH...OR 6 MILES SOUTHEAST OF ATHENS...AND MOVING NORTHEAST AT
  25 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  MADISONVILLE...NIOTA...MOUNT VERNON...TARIFFVILLE...VONORE AND
  CITICO BEACH.

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.

&&

LAT...LON 3544 8465 3576 8430 3562 8416 3560 8418
      3558 8412 3550 8405 3528 8453
TIME...MOT...LOC 1733Z 237DEG 21KT 3541 8448

$$

GH

1 follow-up statement

744 
WWUS54 KMRX 261759
SVSMRX

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

TNC105-107-123-261815-
/O.CON.KMRX.SV.W.0192.000000T0000Z-110526T1815Z/
LOUDON TN-MCMINN TN-MONROE TN-
159 PM EDT THU MAY 26 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR MONROE...MCMINN AND LOUDON COUNTIES...

AT 154 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR MADISONVILLE...MOVING NORTHEAST AT 30 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  TARIFFVILLE...VONORE AND CITICO BEACH.

LAT...LON 3528 8453 3537 8459 3552 8439 3564 8442
      3576 8430 3562 8416 3560 8418 3558 8414
      3550 8405
TIME...MOT...LOC 1758Z 234DEG 27KT 3555 8428

$$

GM

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, 3 hours 22 minutes earlier.

Area forecast discussion, May 26, 10:11 AM EDT, 3 hours 22 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, 11 hours 11 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, 8:27 AM EDT, 5 hours 6 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, 1 hour 47 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, 1 hour 33 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

&&

Local storm report, May 26, 1:05 PM EDT, 28 minutes before

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

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

1115 AM     TSTM WND DMG     CLEVELAND               35.18N 84.87W
05/26/2011                   BRADLEY            TN   LAW ENFORCEMENT

            ONE TREE DOWN.

1115 AM     TSTM WND DMG     5 S CLEVELAND           35.11N 84.87W
05/26/2011                   BRADLEY            TN   LAW ENFORCEMENT

            LARGE TREE LIMB DOWN IN SOUTH CLEVELAND.

&&

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, 12:18 PM EDT	Severe Thunderstorm Warning	MRX	Anderson, Blount, Campbell, Grainger, Knox, Loudon and 2 more	42 min
May 26, 1:02 PM EDT	Severe Thunderstorm Warning	MRX	Blount, Claiborne, Cocke, Grainger, Greene, Hamblen and 6 more	43 min
May 26, 1:47 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.