Alert archive / Tennessee / Flash Flood Warnings in 2012
Flash Flood Warning 14, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Aug 1, 2012, 9:00 PM EDT for Bradley County, Tennessee. It was in force for 3 hr. 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
- Aug 1, 2012, 9:00 PM EDT (01:00 UTC)
- Expired
- Aug 2, 2012, 12:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Bradley County, TN
The radar
The Northeast Alabama radar (KHTX), 120 km from the middle of the area, began a volume at 01:02 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 |
|---|---|---|---|
| Aug 1, 10:00 PM EDT | FLASH FLOOD | 1 Sse Cleveland, TN | WATER UP TO 3 FEET ON THE ROAD AT BLUE SPRINGS ROAD AND 20TH STREET SE. |
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, 1.0 hours before the alert went out and 190 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
- 2342 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1658 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
009
WGUS54 KMRX 020100
FFWMRX
TNC011-020400-
/O.NEW.KMRX.FF.W.0014.120802T0100Z-120802T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
900 PM EDT WED AUG 1 2012
THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BRADLEY COUNTY IN EAST TENNESSEE...
THIS INCLUDES THE CITY OF CLEVELAND...
* UNTIL MIDNIGHT
* AT 852 PM...DOPPLER RADAR REVEALED A CLUSTER OF THUNDERSTORMS WITH
VERY HEAVY RAINFALL OVER NORTHERN BRADLEY COUNTY...WITH ADDITIONAL
REDEVELOPMENT OCCURRING BEHIND THEM. RADAR HAS ESTIMATED THAT
RAINFALL AMOUNTS OF THREE TO FOUR INCHES HAVE ALREADY FALLEN OVER
MOST OF NORTHERN BRADLEY COUNTY...WITH AN ADDITIONAL INCH OR TWO OF
RAIN POSSIBLE IN THE NEXT COUPLE OF HOURS. RAINFALL OF THIS
MAGNITUDE WILL LIKELY CAUSE FLOODING OF MANY ROADS...ESPECIALLY
THOSE IN LOW LYING AREAS AND FLOOD PRONE AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
&&
LAT...LON 3534 8487 3524 8472 3520 8471 3506 8475
3517 8500
$$
DMG1 follow-up statement
471
WGUS74 KMRX 020248
FFSMRX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MORRISTOWN TN
1048 PM EDT WED AUG 1 2012
TNC011-020400-
/O.CON.KMRX.FF.W.0014.000000T0000Z-120802T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BRADLEY TN-
1048 PM EDT WED AUG 1 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT FOR
BRADLEY COUNTY...
AT 1035 PM...DOPPLER RADAR INDICATED THAT SHOWERS AND THUNDERSTORMS
HAD DIMINISHED OVER BRADLEY COUNTY. HOWEVER...RUNOFF FROM THE
EARLIER HEAVY RAINFALL WILL LIKELY CONTINUE TO CAUSE SOME FLOODING
PROBLEMS IN LOW LYING AND FLOOD PRONE AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.
&&
LAT...LON 3534 8487 3524 8472 3520 8472 3506 8475
3517 8500
$$
DMGThe office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 8:18 PM EDT | Areal Flood Advisory | MRX | Bradley, McMinn, Polk | 117 min |
| Aug 1, 8:28 PM EDT | Severe Thunderstorm Warning | MRX | Bradley, Hamilton, Polk | 32 min |
| Aug 1, 8:47 PM EDT | Tornado Warning | MRX | Bradley, Hamilton | 28 min |
| Aug 1, 10:10 PM EDT | Severe Thunderstorm Warning | MRX | Marion, Sequatchie | 35 min |
Nearby
Flash Flood Warnings in Tennessee, 2012Every flash flood 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.