Alert archive / Tennessee / Freeze Warnings in 2007
Freeze Warning 9, NWS Morristown, TN
NWS Morristown, TN issued this freeze warning at Nov 6, 2007, 2:30 PM EST for 21 counties in Tennessee. It took effect at Nov 7, 2007, 2:00 AM EST. It was in force for 7 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Nov 6, 2007, 2:30 PM EST (19:30 UTC)
- In effect from
- Nov 7, 2007, 2:00 AM EST
- Expired
- Nov 7, 2007, 9:00 AM EST
- In force
- 7 hr
- Issued by
- NWS Morristown, TN
All 21 counties
Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Cocke County, TN, Grainger County, TN, Hamblen County, TN, Hamilton County, TN, Jefferson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Sequatchie County, TN, Sevier County, TN, Union County, TN
The radar
The Knoxville radar (KMRX), 99 km from the middle of the area, began a volume at 19:27 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 7.5 hours before the alert went out and 210 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1823 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- -102 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this freeze 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 freeze warning went out at Nov 5, 3:45 PM EST, 22 hours 45 minutes earlier.
Area forecast discussion, Nov 5, 3:45 PM EST, 22 hours 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MORRISTOWN TN
345 PM EST MON NOV 5 2007
.SHORT TERM (TONIGHT THROUGH TUESDAY)...BREEZY AFTERNOON ACROSS THE
AREA TODAY THREATENING TO SPREAD ANY FIRES THAT START UP. GULF
MOISTURE NOW FLOWING INTO AREA WITH DEW POINT RISING FROM 30
DEGREES TO 47 DEGREES IN LAST FOUR HOURS AT KTYS. ALSO SAW AIRCRAFT
SOUNDINGS FROM KTRI SHOWING DEW POINT AT 1230 UTC WAS -14 DEG
C...VERSUS +1 DEG C AT 1845 UTC. NOT THAT WILD FIRE THREAT HAS GONE
AWAY...BUT FIRE BEHAVIOR WONT BE QUITE AS BAD NOW THAT MOISTURE IS
MOVING IN.
SHOULD BE WINDY ENOUGH TO WARRANT WIND ADVISORY IN E TN/W NC
MOUNTAINS...AND THINK THIS WILL BE FURTHER ALERT TO FIRE AND
FORESTRY AGENCIES FOR POSSIBLE FAST SPREADING FIRES AT HIGHER
ELEVATIONS.
WITH DEW POINTS RISING...INSTABILITY WILL BE GETTING BETTER FOR
STORMS...BUT THINK THAT TIMING WILL KEEP MOST OF ACTIVITY AS JUST
SHOWERS. FOR QPF...THINK 0.2 TO 0.3 INCH BASIN-AVERAGE AMOUNTS WILL
BE ABOUT IT SINCE MOVEMENT WILL BE PRETTY FAST.
WENT ON WARM SIDE OF GUIDANCE FOR LOWS AND HIGHS THESE TWO PERIODS.
.LONG TERM (TUESDAY NIGHT THROUGH MONDAY)...AFTER COLD FRONT EXITS
AREA TUESDAY, EXPECT SURFACE PRESSURE GRADIENT TO STAY A LITTLE
TIGHT UNTIL MIDNIGHT OR SO, PROVIDING SOME BREEZY CONDITIONS INTO
THE NIGHT. BUT WINDS WILL DIE DOWN THROUGH THE NIGHT. STILL, WITH
COLDER AIR AND A LITTLE WIND IT WILL BE THE RAWEST NIGHT OF THE
SEASON SO FAR. SURFACE HIGH BUILDS IN WEDNESDAY AND THURSDAY WITH
DRIER AND COOLER AIR, BUT THEN ANOTHER WAVE MOVES ACROSS THE NORTH
PORTIONS AND PROVIDES JUST ENOUGH LIFT TO BRING A SLIGHT CHANCE OF
SHOWERS. PREVIOUS PACKAGE HAD DRY WITH A LITTLE DOUBT, AND I HAVE
OPTED TO BRING LOW POPS INTO THE PICTURE LATE THURSDAY AND EARLY
FRIDAY. AFTER THIS ANOTHER DRY PERIOD. TEMPS MORE LIKE SEASONAL.
RAIN AMOUNTS NOT EXPECTED TO BE ANYTHING TO WRITE HOME ABOUT AND
WILL SAY THAT THE DROUGHT WILL CONTINUE TO GRADUALLY WORSEN FOR
ANOTHER WEEK.
&&
.PRELIMINARY POINT TEMPS/POPS...
CHATTANOOGA AIRPORT, TN 46 56 30 55 33 / 50 10 0 10 10
KNOXVILLE MCGHEE TYSON AIRPORT, TN 43 50 28 52 32 / 60 10 0 10 10
OAK RIDGE, TN 43 55 29 52 32 / 70 10 0 0 10
TRI CITIES AIRPORT, TN 41 51 27 50 29 / 80 10 10 10 10
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...WIND ADVISORY UNTIL 4 AM EST TUESDAY FOR THE FOLLOWING ZONES:
CHEROKEE...CLAY.
TN...WIND ADVISORY UNTIL 4 AM EST TUESDAY FOR THE FOLLOWING ZONES:
BLOUNT SMOKY MOUNTAINS...COCKE SMOKY MOUNTAINS...EAST
POLK...JOHNSON...SEVIER SMOKY MOUNTAINS...SOUTHEAST
CARTER...SOUTHEAST GREENE...SOUTHEAST MONROE...UNICOI.
VA...NONE.
&&
GM/BBThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 5, 9:11 PM EST | Freeze Watch | MRX | Anderson, Bledsoe, Blount, Bradley, Cocke, Grainger and 15 more | 17 hr |
Nearby
Freeze Warnings in Tennessee, 2007Every freeze 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.