Alert archive / Tennessee / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 276, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 30, 2009, 9:35 PM CDT for Bledsoe County, Rhea 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 30, 2009, 9:35 PM CDT (02:35 UTC)
- Expired
- Jul 30, 2009, 10:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Bledsoe County, TN, Rhea County, TN
The radar
The Northeast Alabama radar (KHTX), 119 km from the middle of the area, began a volume at 02:35 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 00:00Z, 2.6 hours before the alert went out and 150 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
- 1948 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 739 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.6
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 30, 7:56 PM CDT, 1 hour 39 minutes earlier.
Area forecast discussion, Jul 30, 7:56 PM CDT, 1 hour 39 minutes before
AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE MORRISTOWN TN
856 PM EDT THU JUL 30 2009
.DISCUSSION...
AN EARLY UPDATE APPEARS TO BE IN ORDER AS PRECIP IS MOVING INTO THE
AREA A BIT FASTER THAN EXPECTED. GIVEN THE SOLID COVERAGE OF PRECIP
SEEN UPSTREAM...THE HIGH MOISTURE CONTENT OF THE ATMOSPHERE...AND
THE GOOD UPPER DYNAMICS THAT WILL BE COMING ACROSS LATER
TONIGHT...WILL RAISE POPS TO CAREGORICAL OVERNIGHT AND INTO FRIDAY
MORNING. WILL ALSO ADD SOME HEAVY RAIN WORDING TO BETTER MATCH THE
FLOOD WATCH.
&&
.MRX WATCHES/WARNINGS/ADVISORIES...
NC...NONE.
TN...FLOOD WATCH THROUGH FRIDAY EVENING FOR THE FOLLOWING ZONES:
ANDERSON...BLEDSOE...BLOUNT SMOKY MOUNTAINS...BRADLEY...
CAMPBELL...CLAIBORNE...COCKE SMOKY MOUNTAINS...EAST POLK...
GRAINGER...HAMBLEN...HAMILTON...HANCOCK...HAWKINS...
JEFFERSON...JOHNSON...KNOX...LOUDON...MARION...MCMINN...
MEIGS...MORGAN...NW BLOUNT...NORTH SEVIER...NORTHWEST
CARTER...NORTHWEST COCKE...NORTHWEST GREENE...NORTHWEST
MONROE...RHEA...ROANE...SCOTT TN...SEQUATCHIE...SEVIER
SMOKY MOUNTAINS...SOUTHEAST CARTER...SOUTHEAST GREENE...
SOUTHEAST MONROE...SULLIVAN...UNICOI...UNION...WASHINGTON
TN...WEST POLK.
VA...FLOOD WATCH THROUGH FRIDAY EVENING FOR THE FOLLOWING ZONES:
LEE...RUSSELL...SCOTT...WASHINGTON...WISE.
&&
DGSHazardous weather outlook, Jul 30, 3:55 AM CDT, 17 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MORRISTOWN TN 455 AM EDT THU JUL 30 2009 NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002- 005-006-008-310900- 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- 455 AM EDT THU JUL 30 2009 /355 AM CDT THU JUL 30 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST NORTH CAROLINA...EAST TENNESSEE AND SOUTHWEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT UPPER LEVEL DISTURBANCES COMBINED WITH ABUNDANT MOISTURE AHEAD OF A NEARLY STATIONARY FRONT ACROSS THE OHIO VALLEY WILL PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS OVER THE TENNESSEE VALLEY TODAY AND TONIGHT. LOCALLY HEAVY RAINFALL IS POSSIBLE TONIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY MOISTURE AND INSTABILITY WILL REMAIN ACROSS THE SOUTHERN APPALACHIANS AND TENNESSEE VALLEY FRIDAY AND FRIDAY NIGHT. A COLD FRONT WILL MOVE INTO THE REGION FRIDAY. NUMEROUS SHOWERS AND THUNDERSTORMS ARE ANTICIPATED AHEAD OF THE FRONT FRIDAY AND FRIDAY EVENING...WITH LOCALLY HEAVY RAINFALL POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED FRIDAY DUE TO HEAVY RAINFALL. TD
In the hours before
Special weather statement, Jul 30, 8:06 PM CDT, 1 hour 29 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 906 PM EDT THU JUL 30 2009 TNZ081-098>100-310200- BRADLEY-HAMILTON-MARION-SEQUATCHIE- 906 PM EDT THU JUL 30 2009 ...STRONG THUNDERSTORMS WILL BE AFFECTING BRADLEY...HAMILTON...MARION AND SEQUATCHIE COUNTIES... AT 803 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES SOUTH OF RINGGOLD TO 9 MILES SOUTHWEST OF CHATTANOOGA VALLEY TO BRIDGEPORT... MOVING NORTH AT 30 MPH. SMALL HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THESE STORMS. IN ADDITION TO SMALL HAIL AND GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS IMMEDIATELY LIGHTNING IS ONE OF NATURES PRIMARY KILLERS ASSOCIATED WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. 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 MJB
Local storm report, Jul 30, 8:53 PM CDT, 42 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 30, 8:15 PM CDT | Severe Thunderstorm Warning | MRX | Marion, Sequatchie | 60 min |
| Jul 31, 5:22 AM CDT | Areal Flood Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Hamilton, Knox and 9 more | 3 hr |
| Jul 31, 6:21 AM CDT | Areal Flood Advisory | MRX | Anderson, Blount, Cocke, Grainger, Greene, Hamblen and 6 more | 3 hr |
| Jul 31, 7:28 AM CDT | Areal Flood Advisory | MRX | Carter, Hancock, Hawkins, Johnson, Sullivan, Unicoi and 1 more | 3 hr |
| Jul 31, 9:33 AM CDT | Areal Flood Warning | MRX | Blount, Monroe, Sevier | 3 hr |
| Jul 31, 9:42 AM CDT | Areal Flood Advisory | MRX | Cocke, Greene, Jefferson | 3 hr |
| Jul 31, 10:21 AM CDT | Areal Flood Advisory | MRX | Carter, Johnson, Sullivan, Unicoi, Washington | 3 hr |
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.