Alert archive / Tennessee / Severe Thunderstorm Warnings in 2015
Severe Thunderstorm Warning 109, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 30, 2015, 5:49 PM EDT for 4 counties in Tennessee. It was in force for 41 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
- Jun 30, 2015, 5:49 PM EDT (21:49 UTC)
- Expired
- Jun 30, 2015, 6:30 PM EDT
- In force
- 41 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Loudon County, TN, McMinn County, TN, Monroe County, TN, Roane County, TN
The radar
The Knoxville radar (KMRX), 111 km from the middle of the area, began a volume at 21:49 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 204 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.
- Mixed-layer CAPE
- 1010 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1021 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
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 Jun 30, 2:46 PM EDT, 3 hours 3 minutes earlier.
Area forecast discussion, Jun 30, 2:46 PM EDT, 3 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 246 PM EDT TUE JUN 30 2015 .SHORT TERM (TONIGHT AND WEDNESDAY)...THE POTENTIAL FOR STRONG TO SEVERE THUNDERSTORMS WILL PERSIST INTO THE EVENING HOURS. THE AIR MASS IS MODERATELY UNSTABLE...CAPES 2000 TO 3000J/KG AND LOW LEVEL MOISTURE IS INCREASING WITH PWS RANGING FROM 1.25 TO 1.5 INCHES. THE ATMOSPHERE WILL BEGIN TO STABILIZE AS WE APPROACH SUNSET AND THUNDERSTORM INTENSITY AND COVERAGE SHOULD DIMINISH. A FEW THUNDERSTORMS WILL LINGER INTO THE OVERNIGHT HOURS BUT THE CHANCE OF STORMS BECOMING STRONG TO SEVERE WILL BE MINIMAL. ANOTHER ROUND OF CONVECTION IS EXPECTED TO DEVELOP WEDNESDAY AFTERNOON. .LONG TERM (WEDNESDAY NIGHT THROUGH TUESDAY NIGHT)...ACTIVE AND UNSETTLED PATTERN STILL ADVERTISED...WITH THE BEST BET FOR WIDESPREAD SHOWERS AND SCATTERED STRONG TO SEVERE STORMS FOR THURSDAY AND THURSDAY NIGHT. SOME LOCALLY HEAVY RAINFALL AS WELL GIVEN THE UPPER LEVEL SUPPORT...SURFACE LOW AND HIGH PRECIPITABLE WATER VALUES (1.60 TO 2.00 INCHES). LIGHTER RAINFALL EXPECTED FOR FRIDAY BUT STILL SOLID LIKELY POPS NEEDED...DUE TO DAYTIME HEATING AND POTENTIAL UPSTREAM SHORTWAVE. OTHERWISE...ADDITIONAL SHORTWAVES MOVING THROUGH THE EASTERN UPPER LEVEL TROUGH...DAYTIME HEATING AND FRONTAL BOUNDARIES THROUGH THE WEEKEND. GOOD CONTINUITY WITH PREVIOUS MODEL RUNS AND GRIDS. LOWERED RAIN CHANCES BELOW LIKELY FOR MONDAY AND TUESDAY...DUE TO SOME DEGREE OF UPPER RIDGING RETURNING. PLEASANT HIGH TEMPS FOR EARLY JULY MAINLY IN THE 70S AND 80S FOR LOWER ELEVATIONS THROUGH THE LONG TERM. STAYED CLOSE TO GFS MOS EARLY THEN IN LINE WITH THE SUPERBLEND TEMPS IN GENERAL. GEARING UP TO HANDLE STRONG TO SEVERE STORMS OVER THE REMAINDER OF THE AFTERNOON AND EVENING. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 69 86 70 82 / 40 60 70 80 KNOXVILLE MCGHEE TYSON AIRPORT, TN 66 83 67 80 / 50 60 70 80 OAK RIDGE, TN 66 83 67 79 / 50 60 70 80 TRI CITIES AIRPORT, TN 63 80 64 78 / 60 60 60 80 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && MJB/TG
Hazardous weather outlook, Jun 30, 3:10 PM EDT, 2 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 310 PM EDT TUE JUN 30 2015 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-005- 006-008-011000- 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- 310 PM EDT TUE JUN 30 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...REST OF TODAY AND TONIGHT... NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE SOUTHERN APPALACHIAN REGION LATE THIS AFTERNOON AND EVENING. THERE IS A POTENTIAL FOR A FEW SEVERE STORMS...WITH LARGE HAIL AND DAMAGING WIND GUSTS. HEAVY RAIN AND FREQUENT LIGHTNING CAN BE EXPECTED WITH MOST STORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... AN UPPER TROUGH OF LOW PRESSURE WILL REMAIN ACROSS THE EASTERN UNITED STATES FOR MUCH OF THE WEEK. SEVERAL ROUNDS OF DISTURBANCES MOVING AROUND THE TROUGH WILL BRING SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS EACH DAY...ESPECIALLY DURING THE AFTERNOON AND EVENING HOURS. A CHANCE OF STRONG TO SEVERE THUNDERSTORMS EXISTS EACH DAY...WITH THE MAIN CONCERN BEING STRONG DOWNBURSTS WINDS...TORRENTIAL RAINS...AND FREQUENT LIGHTNING. LOCALIZED FLASH FLOODING IS POSSIBLE...WITH THE GREATEST RISK OF FLOODING EXPECTED TO BE WEDNESDAY AFTERNOON THROUGH THURSDAY EVENING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED AT TIMES FROM THIS AFTERNOON THROUGH THURSDAY.
In the hours before
Local storm report, Jun 30, 4:37 PM EDT, 1 hour 12 minutes before
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</html>Special weather statement, Jun 30, 5:31 PM EDT, 18 minutes before
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</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:00 PM EDT | Special Weather Statement | MRX | Claiborne | 45 min |
| Jun 29, 8:09 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Claiborne | 28 min |
| Jun 29, 8:58 PM EDT | Special Weather Statement | MRX | Campbell, Morgan, Scott, Union | 62 min |
| Jun 29, 9:25 PM EDT | Special Weather Statement | MRX | Grainger, Hamblen | 50 min |
| Jun 29, 10:09 PM EDT | Special Weather Statement | MRX | Anderson, Morgan | 36 min |
| Jun 29, 11:27 PM EDT | Areal Flood Advisory | MRX | Anderson, Knox, Morgan | 2 hr |
| Jun 30, 1:36 AM EDT | Areal Flood Advisory | MRX | Anderson, Knox, Morgan, Roane | 4 hr |
| Jun 30, 6:06 AM EDT | Areal Flood Advisory | MRX | Bledsoe, McMinn, Meigs, Rhea | 114 min |
| Jun 30, 7:19 AM EDT | Special Weather Statement | MRX | Monroe, Polk | 41 min |
| Jun 30, 9:12 AM EDT | Special Weather Statement | MRX | Hamilton | 48 min |
| Jun 30, 9:48 AM EDT | Special Weather Statement | MRX | Bradley | 27 min |
| Jun 30, 12:02 PM EDT | Special Weather Statement | MRX | Roane | 43 min |
| Jun 30, 12:25 PM EDT | Special Weather Statement | MRX | Bledsoe, Marion, Rhea, Sequatchie | 50 min |
| Jun 30, 1:36 PM EDT | Severe Thunderstorm Warning | MRX | McMinn, Meigs, Rhea | 54 min |
| Jun 30, 2:06 PM EDT | Special Weather Statement | MRX | Roane | 39 min |
| Jun 30, 2:16 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Morgan, Roane | 44 min |
| Jun 30, 2:38 PM EDT | Areal Flood Advisory | MRX | McMinn, Meigs, Rhea | 3 hr |
| Jun 30, 2:43 PM EDT | Areal Flood Advisory | MRX | Roane | 2 hr |
| Jun 30, 2:59 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Knox, Loudon, Roane | 46 min |
| Jun 30, 3:08 PM EDT | Special Weather Statement | MRX | Jefferson | 52 min |
| Jun 30, 3:20 PM EDT | Special Weather Statement | MRX | Morgan, Scott | 40 min |
| Jun 30, 3:25 PM EDT | Flash Flood Warning | MRX | Roane | 3 hr |
| Jun 30, 3:30 PM EDT | Areal Flood Advisory | MRX | Blount, Knox, Loudon, Roane, Sevier | 3 hr |
| Jun 30, 3:30 PM EDT | Severe Thunderstorm Warning | MRX | Morgan, Scott | 45 min |
| Jun 30, 3:59 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Morgan, Roane | 33 min |
| Jun 30, 4:28 PM EDT | Special Weather Statement | MRX | Claiborne | 47 min |
| Jun 30, 5:01 PM EDT | Areal Flood Advisory | MRX | Morgan, Roane | 119 min |
| Jun 30, 5:15 PM EDT | Special Weather Statement | MRX | Grainger | 45 min |
| Jun 30, 5:29 PM EDT | Special Weather Statement | MRX | Loudon | 46 min |
| Jun 30, 5:31 PM EDT | Special Weather Statement | MRX | Bledsoe | 44 min |
| Jun 30, 6:15 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Loudon, McMinn, Meigs, Monroe, Rhea and 1 more | 2 hr |
| Jun 30, 6:27 PM EDT | Areal Flood Warning | MRX | Roane | 2 hr |
| Jun 30, 6:28 PM EDT | Special Weather Statement | MRX | Monroe | 47 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2015Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.