Alert archive / Tennessee / Flash Flood Warnings in 2010
Flash Flood Warning 23, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Nov 30, 2010, 8:39 AM EST for Morgan County, Tennessee. It was in force for 4 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 30, 2010, 8:39 AM EST (13:39 UTC)
- Expired
- Nov 30, 2010, 12:30 PM EST
- In force
- 4 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Morgan County, TN
The radar
The Knoxville radar (KMRX), 112 km from the middle of the area, began a volume at 13:39 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, 1.7 hours before the alert went out and 175 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
- 14 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- -136 m²/s²
- 0-3 km storm-relative helicity
- -299 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
What forecasters said that day
The local office's own words before this flash flood 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 flash flood warning went out at Nov 30, 3:38 AM EST, 5 hours 1 minute earlier.
Area forecast discussion, Nov 30, 3:38 AM EST, 5 hours 1 minute before
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</html>Hazardous weather outlook, Nov 30, 4:16 AM EST, 4 hours 23 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 416 AM EST TUE NOV 30 2010 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-010930- 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- 416 AM EST TUE NOV 30 2010 /316 AM CST TUE NOV 30 2010/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT A POWERFUL STORM SYSTEM WILL BRING STRONG SOUTHEASTERLY WINDS ACROSS THE HIGHER ELEVATIONS TONIGHT...WITH THESE HIGH WINDS ALSO AFFECTING THE FOOTHILLS DUE TO MOUNTAIN WAVES. STRONG WINDS WILL ALSO BE POSSIBLE ELSEWHERE AS SOME OF THE STRONGER SHOWERS PULL THESE STRONG WINDS DOWN INTO THE VALLEY AREAS. FOR FURTHER DETAILS...PLEASE SEE THE HIGH WIND WARNING AND WIND ADVISORY PRODUCT (MEMNPWMRX). ANOTHER CONCERN INVOLVES THE POSSIBILITY OF THUNDERSTORMS DEVELOPING ACROSS SOUTHEAST TENNESSEE...SINCE THESE STORMS WILL LIKELY ROTATE AND COULD PRODUCE ISOLATED TORNADOES... MAINLY OVER SOUTHEAST TENNESSEE. IN ADDITION TO THE STRONG WINDS...SOME AREAS COULD EXPERIENCE MINOR FLOODING DUE TO LOCALLY HEAVY RAINFALL. TEMPERATURES WILL DROP DRAMATICALLY TONIGHT...WITH ANY LINGERING RAIN SHOWERS CHANGING TO SNOW SHOWERS ALONG WITH LIGHT ACCUMULATIONS ACROSS THE HIGHER ELEVATIONS BY EARLY WEDNESDAY MORNING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY FOR DAMAGING WIND REPORTS...ESPECIALLY IN AND AROUND THE MOUNTAINS.
In the hours before
Special weather statement, Nov 30, 5:20 AM EST, 3 hours 19 minutes before
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</html>Special weather statement, Nov 30, 6:55 AM EST, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 655 AM EST TUE NOV 30 2010 TNZ098-301300- MARION TN- 555 AM CST TUE NOV 30 2010 ...SIGNIFICANT WEATHER ADVISORY FOR MARION COUNTY UNTIL 700 AM CST... AT 548 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM TRACY CITY TO 19 MILES WEST OF BRIDGEPORT...AND MOVING EAST AT 40 MPH. WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE STORMS...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...JASPER...SOUTH PITTSBURG...WHITWELL...ORME...GRIFFITH CREEK...MARTIN SPRINGS... POWELLS CROSSROADS AND HALETOWN (GUILD). 17
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 5:44 AM EST | Areal Flood Advisory | MRX | Anderson, Bledsoe, Bradley, Campbell, Hamilton, Loudon and 8 more | 4 hr |
| Nov 30, 9:37 AM EST | Areal Flood Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 16 more | 4 hr |
| Nov 30, 11:18 AM EST | River Flood Warning | MRX | Sevier | 17 hr |
| Nov 30, 2:50 PM EST | Wind Advisory | MRX | Blount, Carter, Cocke, Greene, Johnson, McMinn and 5 more | 3 hr |
| Nov 30, 1:17 PM EST | Areal Flood Advisory | MRX | Cherokee, Clay | 118 min |
Nearby
Flash Flood Warnings in Tennessee, 2010Every flash flood warning in 2010
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.