Alert archive / Tennessee / Special Weather Statements in 2021
Special Weather Statement, NWS Morristown, TN
NWS Morristown, TN issued this special weather statement at Jul 9, 2021, 10:54 AM EDT for Hamilton County, Marion County, Sequatchie County, Tennessee. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2021, 10:54 AM EDT (14:54 UTC)
- Expired
- Jul 9, 2021, 11:45 AM EDT
- In force
- 51 min
- Issued by
- NWS Morristown, TN
Counties Hamilton County, TN, Marion County, TN, Sequatchie County, TN
The radar
The Northeast Alabama radar (KHTX), 74 km from the middle of the area, began a volume at 14:54 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, 2.9 hours before the alert went out and 158 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
- 1159 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 690 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 9, 10:13 AM EDT, 41 minutes earlier.
Area forecast discussion, Jul 9, 10:13 AM EDT, 41 minutes before
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</html>Hazardous weather outlook, Jul 9, 3:27 AM EDT, 7 hours 27 minutes before
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</html>In the hours before
Special weather statement, Jul 9, 9:30 AM EDT, 1 hour 24 minutes before
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</html>Special weather statement, Jul 9, 10:00 AM EDT, 54 minutes before
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</html>Special weather statement, Jul 9, 10:54 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service Morristown TN
1054 AM EDT Fri Jul 9 2021
TNZ081-098-099-091545-
Sequatchie TN-Marion TN-Hamilton TN-
1054 AM EDT Fri Jul 9 2021
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SEQUATCHIE...MARION AND
HAMILTON COUNTIES UNTIL 1145 AM EDT/1045 AM CDT/...
At 1054 AM EDT/954 AM CDT/, Doppler radar was tracking a strong
thunderstorm near Whitwell, or 7 miles southwest of Dunlap, moving
east southeast at 35 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Chattanooga, Dunlap, Jasper, Soddy-Daisy, Signal Mountain, South
Pittsburg, Walden, Lakesite, Whitwell and Kimball.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3498 8560 3502 8575 3531 8560 3532 8556
3538 8550 3535 8497 3522 8498 3514 8503
3507 8500 3499 8500
TIME...MOT...LOC 1454Z 276DEG 33KT 3529 8548The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 9:30 AM EDT | Special Weather Statement | MRX | Blount, McMinn, Monroe | 45 min |
| Jul 9, 9:51 AM EDT | Areal Flood Advisory | MRX | Bledsoe | 114 min |
| Jul 9, 9:54 AM EDT | Areal Flood Advisory | MRX | Loudon, Monroe | 2 hr |
| Jul 9, 10:00 AM EDT | Special Weather Statement | MRX | Bradley | 45 min |
| Jul 9, 11:25 AM EDT | Special Weather Statement | MRX | Bradley | 35 min |
| Jul 9, 11:31 AM EDT | Areal Flood Advisory | MRX | Hamilton, Marion | 119 min |
| Jul 9, 11:56 AM EDT | Special Weather Statement | MRX | Bradley, Polk | 34 min |
| Jul 9, 12:24 PM EDT | Areal Flood Advisory | MRX | Bradley, Polk | 3 hr |
| Jul 9, 12:35 PM EDT | Special Weather Statement | MRX | Polk | 40 min |
| Jul 9, 2:41 PM EDT | Special Weather Statement | MRX | Washington | 49 min |
| Jul 9, 3:25 PM EDT | Areal Flood Advisory | MRX | Bledsoe | 2 hr |
| Jul 9, 3:46 PM EDT | Special Weather Statement | MRX | Knox | 29 min |
| Jul 9, 4:12 PM EDT | Flash Flood Warning | MRX | Knox | 111 min |
Nearby
Special Weather Statements in Tennessee, 2021Every special weather statement in 2021
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.