Alert archive / Tennessee / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 13, NWS Morristown, TN
NWS Morristown, TN issued this severe thunderstorm warning at Feb 22, 2012, 9:11 PM EST for 4 counties in Tennessee. It was in force for 34 min. 2 reports 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
- Feb 22, 2012, 9:11 PM EST (02:11 UTC)
- Expired
- Feb 22, 2012, 9:45 PM EST
- In force
- 34 min
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
Counties Bradley County, TN, Hamilton County, TN, McMinn County, TN, Polk County, TN
The radar
The Northeast Alabama radar (KHTX), 124 km from the middle of the area, began a volume at 02:11 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 |
|---|---|---|---|
| Feb 22, 9:20 PM EST | HAIL 1 | Cleveland, TN | QUARTER SIZED HAIL...REPORTED BY SPOTTER. |
| Feb 22, 9:25 PM EST | HAIL 0.25 | 6 Ne Cleveland, TN | DIME TO PEA SIZED HAIL NEAR TASSO...REPORTED BY PUBLIC. |
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 00:00Z, 2.2 hours before the alert went out and 196 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
- 365 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 561 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
453 WUUS54 KMRX 230211 SVRMRX TNC011-065-107-139-230245- /O.NEW.KMRX.SV.W.0013.120223T0211Z-120223T0245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MORRISTOWN TN 911 PM EST WED FEB 22 2012 THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... BRADLEY COUNTY IN EAST TENNESSEE... HAMILTON COUNTY IN EAST TENNESSEE... MCMINN COUNTY IN EAST TENNESSEE... POLK COUNTY IN EAST TENNESSEE... * UNTIL 945 PM EST * AT 903 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HARRISON...OR 8 MILES EAST OF CHATTANOOGA...AND MOVING EAST AT 50 MPH. * LOCATIONS IN THE WARNING INCLUDE... CLEVELAND...BENTON...CHARLESTON...ETOWAH...MCDONALD...FLINT SPRINGS...HOPEWELL...WATERVILLE...TASSO...CALHOUN...PARKSVILLE... DENTVILLE...RELIANCE AND ARCHVILLE. 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 3536 8452 3502 8444 3499 8512 3524 8518 TIME...MOT...LOC 0211Z 259DEG 42KT 3510 8501 $$
1 follow-up statement
478 WWUS54 KMRX 230229 SVSMRX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 929 PM EST WED FEB 22 2012 TNC011-065-107-139-230245- /O.CON.KMRX.SV.W.0013.000000T0000Z-120223T0245Z/ BRADLEY TN-HAMILTON TN-MCMINN TN-POLK TN- 929 PM EST WED FEB 22 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EST FOR POLK...MCMINN...HAMILTON AND BRADLEY COUNTIES... AT 920 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR WATERVILLE...OR NEAR CLEVELAND...MOVING EAST AT 50 MPH. LOCATIONS IN THE WARNING INCLUDE... BENTON...CHARLESTON...ETOWAH...CALHOUN...PARKSVILLE...DENTVILLE... RELIANCE AND ARCHVILLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES PRIMARY KILLERS ASSOCIATED WITH THUNDERSTORMS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 3536 8452 3502 8444 3499 8512 3524 8518 TIME...MOT...LOC 0229Z 259DEG 42KT 3514 8476 $$
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 7:08 PM EST | Severe Thunderstorm Warning | MRX | Campbell, Claiborne, Union | 37 min |
| Feb 22, 7:28 PM EST | Severe Thunderstorm Warning | MRX | Anderson, Campbell, Morgan, Scott | 32 min |
| Feb 22, 7:34 PM EST | Severe Thunderstorm Warning | MRX | Anderson, Blount, Bradley, Hamilton, Knox, Loudon and 6 more | 26 min |
| Feb 22, 7:44 PM EST | Severe Thunderstorm Warning | MRX | Claiborne, Grainger, Greene, Hancock, Hawkins | 46 min |
| Feb 22, 7:52 PM EST | Severe Thunderstorm Warning | MRX | Anderson, Cocke, Grainger, Hamblen, Jefferson, Knox and 1 more | 38 min |
| Feb 22, 8:07 PM EST | Severe Thunderstorm Warning | MRX | Cocke, Greene, Hawkins, Unicoi, Washington | 38 min |
| Feb 22, 8:09 PM EST | Severe Thunderstorm Warning | MRX | Bledsoe, Meigs, Rhea, Roane | 36 min |
| Feb 22, 8:20 PM EST | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, McMinn, Meigs, Monroe, Polk and 1 more | 40 min |
| Feb 23, 3:37 PM EST | Wind Advisory | MRX | Anderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more | 27 hr |
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.