Alert archive / Tennessee / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 228, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 22, 2008, 3:20 PM EDT for Hamilton County, Marion County, Tennessee. It was in force for 55 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
- Jul 22, 2008, 3:20 PM EDT (19:20 UTC)
- Expired
- Jul 22, 2008, 4:15 PM EDT
- In force
- 55 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Hamilton County, TN, Marion County, TN
The radar
The Northeast Alabama radar (KHTX), 68 km from the middle of the area, began a volume at 19:19 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 |
|---|---|---|---|
| Jul 22, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 7.3 hours before the alert went out and 154 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
- 2116 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1289 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 41 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 Jul 22, 1:48 PM EDT, 1 hour 32 minutes earlier.
Area forecast discussion, Jul 22, 1:48 PM EDT, 1 hour 32 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 148 PM EDT TUE JUL 22 2008 .AVIATION...VFR CONDITIONS FOR A FEW HOURS THIS AFTERNOON BUT SHOWERS AND THUNDERSTORMS DEVELOPING AFTER 20Z SHOULD BRING THUNDERSTORMS THROUGH TAF SITES WITH GUSTY WINDS. THEN WITH UPPER TROUGH DROPPING SOUTH INTO TN HAVE PUT PREVAILING SHOWERS AFTER 6Z WITH MVFR FOG AT CHA AND TRI. COULD HAVE SOME THUNDERSTORMS DURING THE NIGHT AND WEDNESDAY MORNING BUT NOT SURE TIMING SO JUST HAVE CB WITH CLOUDS BUT NEXT SET MAY NEED TO ADD VICINITY THUNDERSTORMS. && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && TD
Hazardous weather outlook, Jul 22, 9:30 AM EDT, 5 hours 50 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 930 AM EDT TUE JUL 22 2008 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-231000- 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- 930 AM EDT (830 AM CDT) TUE JUL 22 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST TENNESSEE...SOUTHWEST VIRGINIA AND EXTREME SOUTHWEST NORTH CAROLINA. .DAY ONE...TODAY AND TONIGHT A COMPLEX OF THUNDERSTORMS OVER THE OHIO RIVER VALLEY WILL MOVE SOUTHEAST INTO THE SOUTHERN APPALACHIAN REGION THIS AFTERNOON AND EVENING. SOME OF THESE STORMS WILL LIKELY BE SEVERE...PRODUCING DAMAGING WINDS...LARGE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY A WEAK COLD FRONT WILL MOVE INTO THE REGION ON WEDNESDAY...WITH SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING AGAIN. SOME OF THESE STORMS COULD POSSIBLY BE SEVERE...PRODUCING DAMAGING WINDS...LARGE HAIL...FREQUENT CLOUD TO GROUND LIGHTNING AND LOCALLY HEAVY RAINFALL. ANOTHER COLD FRONT WILL SLOWLY APPROACH THE REGION BY THE END OF THE WEEK...WITH ISOLATED SEVERE THUNDERSTORMS POSSIBLE EACH DAY FROM FRIDAY THROUGH SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING...AND AGAIN ON WEDNESDAY.
In the hours before
Special weather statement, Jul 22, 1:53 PM EDT, 1 hour 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 153 PM EDT TUE JUL 22 2008 TNZ081-082-221845- BLEDSOE-SEQUATCHIE- 1253 PM CDT TUE JUL 22 2008 ...A STRONG THUNDERSTORM WILL BE AFFECTING BLEDSOE AND SEQUATCHIE COUNTIES... AT 1246 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR DUNLAP...MOVING EAST AT 25 MPH. WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM. IN ADDITION TO SMALL HAIL AND GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES PRIMARY KILLERS. REMEMBER... IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM CDT TUESDAY EVENING FOR CENTRAL TENNESSEE. LCM
Local storm report, Jul 22, 3:04 PM EDT, 16 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 |
|---|---|---|---|---|
| Jul 22, 1:57 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Sequatchie | 48 min |
| Jul 22, 2:35 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea | 55 min |
| Jul 22, 3:23 PM EDT | Areal Flood Advisory | MRX | Bledsoe, Hamilton, Rhea, Sequatchie | 3 hr |
| Jul 22, 3:35 PM EDT | Severe Thunderstorm Warning | MRX | Meigs, Rhea, Roane | 55 min |
| Jul 22, 3:46 PM EDT | Severe Thunderstorm Warning | MRX | Campbell, Scott | 59 min |
| Jul 22, 3:52 PM EDT | Severe Thunderstorm Warning | MRX | Morgan | 53 min |
| Jul 22, 3:58 PM EDT | Severe Thunderstorm Warning | MRX | Bledsoe, Hamilton, Meigs, Rhea, Sequatchie | 62 min |
| Jul 22, 4:10 PM EDT | Severe Thunderstorm Warning | MRX | Roane | 35 min |
| Jul 22, 4:19 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton | 56 min |
| Jul 22, 4:39 PM EDT | Severe Thunderstorm Warning | MRX | Polk | 66 min |
| Jul 22, 4:43 PM EDT | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Claiborne, Morgan, Scott, Union | 62 min |
| Jul 22, 4:53 PM EDT | Areal Flood Advisory | MRX | Polk | 112 min |
| Jul 22, 5:07 PM EDT | Severe Thunderstorm Warning | MRX | Morgan, Scott | 53 min |
| Jul 22, 5:11 PM EDT | Severe Thunderstorm Warning | MRX | Morgan, Scott | 49 min |
| Jul 22, 5:23 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Sevier | 37 min |
| Jul 22, 5:32 PM EDT | Severe Thunderstorm Warning | MRX | Monroe, Polk | 58 min |
| Jul 22, 5:59 PM EDT | Severe Thunderstorm Warning | MRX | Sevier | 31 min |
| Jul 22, 6:08 PM EDT | Areal Flood Advisory | MRX | Sevier | 112 min |
| Jul 22, 6:46 PM EDT | Areal Flood Advisory | MRX | Polk | 59 min |
| Jul 22, 6:48 PM EDT | Severe Thunderstorm Warning | MRX | Washington | 42 min |
| Jul 22, 7:16 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Greene | 59 min |
| Jul 22, 7:24 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 66 min |
| Jul 22, 7:30 PM EDT | Severe Thunderstorm Warning | MRX | Greene, Hawkins | 60 min |
| Jul 22, 7:53 PM EDT | Severe Thunderstorm Warning | MRX | Russell, Scott, Washington | 52 min |
| Jul 22, 6:14 PM EDT | Severe Thunderstorm Warning | MRX | Cherokee, Clay | 46 min |
| Jul 22, 6:22 PM EDT | Areal Flood Advisory | MRX | Cherokee, Clay | 3 hr |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2008Every severe thunderstorm warning in 2008
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.