Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 140, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jun 11, 2009, 2:11 PM EDT for Hamblen County, Jefferson County, Sevier County, Tennessee. It was in force for 64 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 11, 2009, 2:11 PM EDT (18:11 UTC)
- Expired
- Jun 11, 2009, 3:15 PM EDT
- In force
- 64 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Hamblen County, TN, Jefferson County, TN, Sevier County, TN
The radar
The Knoxville radar (KMRX), 17 km from the middle of the area, began a volume at 18:11 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 11, 12:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 6.2 hours before the alert went out and 287 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
- 2748 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 587 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.5
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 11, 2:00 PM EDT, 11 minutes earlier.
Area forecast discussion, Jun 11, 2:00 PM EDT, 11 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE MORRISTOWN TN 200 PM EDT THU JUN 11 2009 .AVIATION...WILL REMAIN IN AN ACTIVITY WEATHER PATTERN THROUGH THE TAF PERIOD WITH A WEAK FRONTAL BOUNDARY SLOWLY SAGGING SOUTHWARD... APPROACHING THE SOUTHERN APPALACHIAN REGION. THE AIR MASS WILL BECOME MODERATELY UNSTABLE THIS AFTERNOON WITH THE HELP OF DAYTIME HEATING. AS A RESULT...WILL CONTINUE TO SEE SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. SOME OF THE STORMS MAY BECOME STRONG...POSSIBLY EVEN SEVERE. COVERAGE AND INTENSITY SHOULD DIMINISH SOMEWHAT AFTER SUNSET...BUT COULD STILL SEE SOME CONVECTION THROUGH THE NIGHT...WITH SOME INTENSIFICATION FRIDAY MORNING. THROUGH THE PERIOD...EXPECT LOCAL MVFR OR IFR CONDITIONS IN AND NEAR CONVECTION...WHERE STORMS HAVE PRODUCED LOWERED CEILINGS...REDUCED VIS AND GUSTY WINDS. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && MJB
Hazardous weather outlook, Jun 11, 5:07 AM EDT, 9 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 507 AM EDT THU JUN 11 2009 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-120915- 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- 507 AM EDT THU JUN 11 2009 /407 AM CDT THU JUN 11 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP...MAINLY THIS AFTERNOON AND LINGER THROUGHOUT THE EVENING...AS A COLD FRONT SAGS SLOWLY SOUTH. A FEW STRONG TO SEVERE STORMS WILL BE POSSIBLE...ESPECIALLY THIS AFTERNOON AND EVENING. THE MAIN THREATS WILL BE DAMAGING WINDS OF 50 MPH OR MORE AND HAIL OF PENNY SIZE OR LARGER. BRIEF LOCALLY HEAVY RAINS COULD OCCUR WITH THE STRONGEST STORMS...WITH FREQUENT DEADLY LIGHTNING STRIKES IN AND NEAR ALL STORMS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A WEAK COLD FRONT WILL LINGER ACROSS THE REGION FRIDAY INTO SATURDAY...HELPING SCATTERED THUNDERSTORMS TO CONTINUE. AN UPPER LEVEL DISTURBANCE ON SUNDAY WILL ALSO PRODUCE MORE SHOWERS AND SCATTERED THUNDERSTORMS. ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE EACH AFTERNOON AND EVENING...FROM FRIDAY THROUGH SUNDAY. THE MAIN THREATS WILL BE DAMAGING DOWNBURSTS WINDS OF 50 MPH OR HIGHER AND LARGE HAIL. LOCALLY HEAVY RAINS IN EXCESS OF ONE INCH WILL ALSO OCCUR WITH THE STRONGER STORMS...AND FREQUENT DEADLY LIGHTNING STRIKES IN AND NEAR ANY THUNDERSTORMS. A RIDGE OF HIGH PRESSURE WILL BUILD EASTWARD FROM THE SOUTHERN PLAINS MONDAY THROUGH WEDNESDAY. THIS SHOULD DECREASE THE CHANCES OF THUNDERSTORMS FOR EARLY NEXT WEEK...WITH MAINLY ISOLATED AFTERNOON AND EVENING STORMS DEVELOPING DURING THE HEAT OF THE DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY...AND POSSIBLY AGAIN FRIDAY AND SATURDAY. TT/TG
In the hours before
Local storm report, Jun 11, 1:16 PM EDT, 55 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 11, 1:18 PM EDT, 53 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 11, 1:24 PM EDT, 47 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 11, 1:28 PM EDT, 43 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 11, 1:29 PM EDT, 42 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Local storm report, Jun 11, 2:05 PM EDT, 6 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 8:07 PM EDT | Severe Thunderstorm Warning | MRX | Loudon, Morgan, Roane | 38 min |
| Jun 10, 8:19 PM EDT | Tornado Warning | MRX | Loudon, Morgan, Roane | 26 min |
| Jun 10, 8:42 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Loudon, Monroe | 48 min |
| Jun 10, 8:48 PM EDT | Severe Thunderstorm Warning | MRX | Loudon, Roane | 27 min |
| Jun 10, 9:20 PM EDT | Severe Thunderstorm Warning | MRX | Monroe | 25 min |
| Jun 11, 11:56 AM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Sequatchie | 64 min |
| Jun 11, 12:27 PM EDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 48 min |
| Jun 11, 12:40 PM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea | 50 min |
| Jun 11, 12:44 PM EDT | Severe Thunderstorm Warning | MRX | Morgan, Roane | 61 min |
| Jun 11, 12:50 PM EDT | Severe Thunderstorm Warning | MRX | Scott | 55 min |
| Jun 11, 12:54 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, McMinn, Monroe, Polk | 51 min |
| Jun 11, 1:12 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell | 63 min |
| Jun 11, 1:18 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Loudon, McMinn, Meigs, Monroe | 57 min |
| Jun 11, 1:28 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Knox | 62 min |
| Jun 11, 1:44 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Monroe, Polk | 46 min |
| Jun 11, 1:52 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Union | 53 min |
| Jun 11, 2:14 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Sevier | 61 min |
| Jun 11, 2:45 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hancock | 30 min |
| Jun 11, 2:57 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Greene, Hawkins | 63 min |
| Jun 11, 3:04 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hancock, Hawkins and 2 more | 26 min |
| Jun 11, 3:31 PM EDT | Severe Thunderstorm Warning | MRX | Unicoi | 49 min |
| Jun 11, 3:36 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan, Washington | 54 min |
| Jun 11, 4:11 PM EDT | Severe Thunderstorm Warning | MRX | Carter | 34 min |
| Jun 11, 4:29 PM EDT | Severe Thunderstorm Warning | MRX | Johnson, Sullivan | 46 min |
| Jun 11, 3:50 PM EDT | Severe Thunderstorm Warning | MRX | Scott | 55 min |
| Jun 11, 4:21 PM EDT | Severe Thunderstorm Warning | MRX | Wise, City of Norton | 39 min |
| Jun 11, 2:38 PM EDT | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 41 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2009Every severe thunderstorm warning in 2009
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.