Alert archive / Tennessee / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 116, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 1, 2007, 3:51 PM CDT for Bledsoe County, Hamilton County, Rhea County, Tennessee. It was in force for 54 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 1, 2007, 3:51 PM CDT (20:51 UTC)
- Expired
- Jul 1, 2007, 4:45 PM CDT
- In force
- 54 min
- Issued by
- NWS Morristown, TN
- Area
- Counties, with a storm outline in the text
Counties Bledsoe County, TN, Hamilton County, TN, Rhea County, TN
The radar
The Northeast Alabama radar (KHTX), 107 km from the middle of the area, began a volume at 20:51 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 1, 12:10 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 8.9 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
- 474 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1036 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 1, 1:57 PM CDT, 1 hour 54 minutes earlier.
Area forecast discussion, Jul 1, 1:57 PM CDT, 1 hour 54 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MORRISTOWN TN 257 PM EDT SUN JUL 1 2007 .SHORT TERM...(TONIGHT AND MONDAY)... THE FRONT ACROSS THE CWA IS LOCATED JUST NORTH OF KNOXVILLE AND INTO THE NORTHERN PLATEAU COUNTIES. PRECIP THIS EVENING WILL BE CONFINED MAINLY ALONG AND TO THE SOUTH OF THE FRONT. GENEROUS INSTABILITY WILL LEAD TO A THREAT OF SOME SEVERE STORMS...MAINLY PRODUCING DAMAGING WINDS. MODELS ALSO SHOW A VORT AXIS MOVING ACROSS THE AREA THIS EVENING...WHICH SHOULD KEEP SOME SHOWERS IN THE SOUTHERN PORTIONS OF THE AREA PAST MIDNIGHT. IN THE NORTH...DRIER AIR HAS MADE ITS WAY INTO THE AREA WITH DEWPOINTS DROPPING INTO THE 50S. THE FRONT WILL GRADUALLY PUSH SOUTH OVERNIGHT...AND SHOULD BE NEAR THE GA/AL BORDER BY MORNING. AS THE HIGH OVER THE GREAT LAKES BUILDS DOWN OVER THE CAROLINAS AND THE TENNESSEE VALLEY...AN INVERTED LOW LEVEL TROUGH DEVELOPS OVER THE APPALACHIANS TOMORROW. THE LIFT IN THE NAM APPEARS WAY OVERDONE...AS IT GIVES CATEGORICAL POPS IN THE SOUTH. WILL STAY CLOSER TO THE CHANCE POPS IN THE GFS...AND CONFINE THEM MAINLY TO THE MOUNTAINS AND SOUTHERN VALLEY. NAM TEMPS ARE ALSO TOO COOL...AND THE WARMER GFS MOS WILL BE PREFERRED. .LONG TERM...(MONDAY NIGHT THROUGH SUNDAY)... INVERTED TROUGH OVER THE APPALACHIANS WILL KEEP A FEW SHOWERS AND THUNDERSTORMS IN THE SOUTHERN MOUNTAINS MONDAY EVENING OTHERWISE SKIES WILL BECOME MOSTLY CLEAR AND TEMPERATURES WILL BE COOLER WITH LOWER DEW POINTS THANKS TO HIGHER PRESSURE OVER THE OHIO VALLEY AND NORTHEAST. TUESDAY NORTHWEST FLOW NORTH OF FRONTAL BOUNDARY WILL KEEP MOST OF FORECAST AREA DRY. MODELS WANT TO BRING THE TAIL END OF SHORTWAVE THATS CURRENTLY ON THE CANADIAN BORDER AND NORTHERN MN AROUND LARGE SOUTHWEST US UPPER RIDGE INTO THE CENTRAL APPALACHIANS LATE TUESDAY AND TUESDAY NIGHT WHICH COULD AFFECT SOUTHWEST VIRGINIA BUT FOR NOW KEEPING IT DRY AND JUST HAVING SLIGHT CHANCE POPS IN THE EASTERN MOUNTAINS. WEDNESDAY AS MOISTURE INCREASES WITH MORE LOW LEVEL MOISTURE HAVE ADDED POPS TO ALL AREAS BUT STILL SEE MOSTLY LATE AFTERNOON CONVECTION FROM HEATING. THURSDAY AND FRIDAY A COLD FRONT MOVING AROUND UPPER RIDGE APPROACHES AND MOVES INTO THE REGION. KEEPING THE WEEKEND DRY FOR NOW WITH FRONT JUST TO THE SOUTH. HOWEVER THIS TIME OF YEAR FRONTS TEND TO WEAKEN AND FALL APART SO DIURNAL POPS MAY HAVE TO BE ADDED LATER. GENERALLY FOLLOWED THE HIGHER MINS WITH THE NAM/WRF FOR LOWS SOUTH WITH A BLEND NORTH MONDAY NIGHT AND TUESDAY NIGHT AND THE WARMER MAV OR SLIGHTLY HIGHER FOR HIGHS TUESDAY AND BEYOND. && .PRELIMINARY POINT TEMPS/POPS... CHATTANOOGA AIRPORT, TN 70 87 68 90 68 / 60 20 10 10 10 KNOXVILLE AIRPORT, TN 67 84 65 88 65 / 50 20 10 10 10 OAK RIDGE, TN 64 87 64 89 65 / 50 10 10 10 10 TRI CITIES AIRPORT, TN 59 83 59 85 60 / 10 10 0 10 10 && .MRX WATCHES/WARNINGS/ADVISORIES... NC...NONE. TN...NONE. VA...NONE. && DGS/TD
Hazardous weather outlook, Jul 1, 4:24 AM CDT, 11 hours 27 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 524 AM EDT SUN JUL 1 2007 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-021000- 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- 524 AM EDT SUN JUL 1 2007 /424 AM CDT SUN JUL 1 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Local storm report, Jul 1, 12:00 PM CDT, 3 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
100 PM EDT SUN JUL 01 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0305 PM TSTM WND DMG CHATTANOOGA 35.07N 85.26W
06/30/2007 HAMILTON TN FIRE DEPT/RESCUE
SECTION OF METAL ROOF OFF FIRE STATION 19 IN HIXSON AREA.
FEW TREES DOWN ON HIXSON PIKE. CAPTIN D SIGN DOWN. DIME
SIZE HAIL ALSO.
&&
MEPSpecial weather statement, Jul 1, 2:57 PM CDT, 54 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 357 PM EDT SUN JUL 1 2007 TNZ081-098-099-012100- HAMILTON-MARION-SEQUATCHIE- 257 PM CDT SUN JUL 1 2007 ...A STRONG THUNDERSTORM WAS AFFECTING HAMILTON...MARION AND SEQUATCHIE COUNTIES... AT 254 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR JASPER...MOVING SOUTHEAST AT 10 MPH. DIME SIZE HAIL...AND WINDS UP TO 40 TO 50 MPH ARE POSSIBLE WITH THIS STORM...AND ALSO WITH OTHER ISOLATED STRONG THUNDERSTORMS OVER PARTS OF SEQUATCHIE AND HAMILTON COUNTIES. ANY FURTHER STRENGTHENING OF THESE STORMS MAY REQUIRE ISSUANCE OF A WARNING. LOCALLY HEAVY RAINS...IN EXCESS OF ONE INCH PER HOUR...MAY OCCUR WITH THESE THUNDERSTORMS. MOTORISTS SHOULD BE ALERT FOR PONDING OF WATER ON ROADWAYS...AND POSSIBLE MINOR FLOODING OF LOW LYING AREAS. DO NOT DRIVE THROUGH WATERS OF UNKNOWN DEPTH. TURN AROUND DONT DROWN STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. TG
Local storm report, Jul 1, 3:37 PM CDT, 14 minutes before
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</html>Special weather statement, Jul 1, 3:40 PM CDT, 11 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 1, 3:16 PM CDT | Severe Thunderstorm Warning | MRX | Hamilton, Marion | 44 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2007Every severe thunderstorm warning in 2007
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.