Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 252, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Jul 31, 2012, 7:41 PM EDT for 4 counties in Tennessee. It was in force for 49 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 31, 2012, 7:41 PM EDT (23:41 UTC)
- Expired
- Jul 31, 2012, 8:30 PM EDT
- In force
- 49 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Bradley County, TN, Hamilton County, TN, Meigs County, TN, Rhea County, TN
The radar
The Northeast Alabama radar (KHTX), 114 km from the middle of the area, began a volume at 23:45 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 31, 7:45 PM EDT | TSTM WND DMG | 2 Se Dayton, TN | DISPATCH REPORTED TWO TREES DOWN...ONE OFF OF RAY ROAD AND THE OTHER OFF BLYTHE FERRY ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 hours before the alert went out and 170 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
- 1558 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 686 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.2
The text
As transmitted, in the capitals the NWS used until 2016.
681
WUUS54 KMRX 312341
SVRMRX
TNC011-065-121-143-010030-
/O.NEW.KMRX.SV.W.0252.120731T2341Z-120801T0030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
741 PM EDT TUE JUL 31 2012
THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN BRADLEY COUNTY IN EAST TENNESSEE...
NORTHERN HAMILTON COUNTY IN EAST TENNESSEE...
SOUTHERN MEIGS COUNTY IN EAST TENNESSEE...
SOUTHERN RHEA COUNTY IN EAST TENNESSEE...
* UNTIL 830 PM EDT
* AT 739 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 6 MILES
SOUTH OF DAYTON...AND MOVING SOUTH AT 20 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
CLEVELAND...SODDY-DAISY...CHARLESTON...SALE CREEK...BIG SPRING...
BIRCHWOOD...SHADY GROVE...HOPEWELL AND TASSO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.
&&
LAT...LON 3520 8533 3545 8517 3547 8512 3550 8514
3554 8510 3557 8511 3564 8503 3562 8488
3546 8479 3535 8486 3529 8475 3529 8473
3528 8472 3527 8475 3525 8471 3516 8470
TIME...MOT...LOC 2341Z 354DEG 18KT 3540 8498
$$
TG1 follow-up statement
981
WWUS54 KMRX 010001 RRA
SVSMRX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
801 PM EDT TUE JUL 31 2012
TNC143-010010-
/O.CAN.KMRX.SV.W.0252.000000T0000Z-120801T0030Z/
RHEA TN-
801 PM EDT TUE JUL 31 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN RHEA COUNTY IS
CANCELLED...
LAT...LON 3520 8533 3543 8516 3532 8486 3529 8475
3529 8473 3528 8472 3527 8475 3525 8471
3516 8470
TIME...MOT...LOC 0000Z 354DEG 18KT 3531 8501
$$
TNC011-065-121-010030-
/O.CON.KMRX.SV.W.0252.000000T0000Z-120801T0030Z/
BRADLEY TN-HAMILTON TN-MEIGS TN-
801 PM EDT TUE JUL 31 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM EDT
FOR EXTREME SOUTHERN MEIGS...NORTHERN HAMILTON AND NORTHERN BRADLEY
COUNTIES...
AT 757 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR BIRCHWOOD...OR 11 MILES SOUTH OF DAYTON...MOVING SOUTH
AT 20 MPH.
LOCATIONS IN THE WARNING INCLUDE...
CLEVELAND...SODDY-DAISY...CHARLESTON...SHADY GROVE...HOPEWELL AND
TASSO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. 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.
&&
LAT...LON 3520 8533 3543 8516 3532 8486 3529 8475
3529 8473 3528 8472 3527 8475 3525 8471
3516 8470
TIME...MOT...LOC 0000Z 354DEG 18KT 3531 8501
$$
TGThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:52 AM EDT | Severe Thunderstorm Warning | MRX | Marion, Sequatchie | 53 min |
| Jul 31, 6:42 AM EDT | Severe Thunderstorm Warning | MRX | Marion | 48 min |
| Jul 31, 6:24 PM EDT | Severe Thunderstorm Warning | MRX | Hancock | 36 min |
| Jul 31, 6:47 PM EDT | Severe Thunderstorm Warning | MRX | Sullivan | 28 min |
| Jul 31, 6:51 PM EDT | Severe Thunderstorm Warning | MRX | Hancock, Hawkins | 24 min |
| Jul 31, 7:12 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Hancock, Hawkins | 33 min |
| Jul 31, 7:17 PM EDT | Severe Thunderstorm Warning | MRX | Greene, Hawkins, Sullivan, Washington | 28 min |
| Jul 31, 7:22 PM EDT | Areal Flood Advisory | MRX | Hancock, Hawkins, Sullivan | 3 hr |
| Jul 31, 7:36 PM EDT | Severe Thunderstorm Warning | MRX | Cocke, Grainger, Greene, Hamblen, Hawkins | 24 min |
| Jul 31, 7:58 PM EDT | Severe Thunderstorm Warning | MRX | Claiborne, Cocke, Grainger, Greene, Jefferson, Knox and 1 more | 32 min |
Nearby
Severe Thunderstorm Warnings in Tennessee, 2012Every severe thunderstorm warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.