Alert archive / Tennessee / Flash Flood Warnings in 2012
Flash Flood Warning 3, NWS Morristown, TN
NWS Morristown, TN issued this flash flood warning at Apr 2, 2012, 6:13 PM EDT for Knox 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
- Apr 2, 2012, 6:13 PM EDT (22:13 UTC)
- Expired
- Apr 2, 2012, 9:15 PM EDT
- In force
- 3 hr
- Issued by
- NWS Morristown, TN
- Area
- Storm-based polygon
- Flood severity
- None
County Knox County, TN
The radar
The Knoxville radar (KMRX), 51 km from the middle of the area, began a volume at 22:14 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 |
|---|---|---|---|
| Apr 2, 6:30 PM EDT | FLASH FLOOD | Knoxville, TN | FLOODING REPORTED WHICH RESULTED IN SOME ROAD CLOSURES AND SUBMERGED CARS NEAR DOWNTOWN. |
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, 10.2 hours before the alert went out and 241 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
- 897 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 785 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
071 WGUS54 KMRX 022213 FFWMRX TNC093-030115- /O.NEW.KMRX.FF.W.0003.120402T2213Z-120403T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MORRISTOWN TN 613 PM EDT MON APR 2 2012 THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A * FLASH FLOOD WARNING FOR... KNOX COUNTY IN EAST TENNESSEE... * UNTIL 915 PM EDT * AT 606 PM EDT...DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS NEAR KNOXVILLE...WHICH HAVE PRODUCED AROUND THREE INCHES OF RAIN IN THE PAST HOUR NEAR EAST KNOXVILLE. ADDITIONAL RAINFALL AMOUNTS AROUND AN INCH OR TWO WILL BE POSSIBLE IN THE NEXT COUPLE OF HOURS. RAINFALL OF THIS MAGNITUDE WILL LIKELY CAUSE FLOODING OF ROADWAYS AND LOW LYING AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. && LAT...LON 3605 8404 3608 8387 3593 8375 3587 8393 $$ DMG
2 follow-up statements
677 WGUS74 KMRX 022323 FFSMRX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 723 PM EDT MON APR 2 2012 TNC093-030115- /O.CON.KMRX.FF.W.0003.000000T0000Z-120403T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KNOX TN- 723 PM EDT MON APR 2 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM FOR KNOX COUNTY... AT 718 PM EDT...SPOTTERS REPORTED FLOODING IN EAST KNOXVILLE FROM EARLIER RAINFALL. WHILE RAIN HAS ENDED IN EAST KNOXVILLE...RUNOFF FROM THE EARLIER RAINFALL WILL CONTINUE FOR THE NEXT FEW HOURS. DOPPLER RADAR CONTINUES TO INDICATE SLOW MOVING THUNDERSTORMS NEAR POWELL AND WEST KNOXVILLE...WHICH HAVE PRODUCED AROUND TWO INCHES OF RAIN IN THE PAST HOUR. ADDITIONAL RAINFALL AMOUNTS AROUND AN INCH OR TWO WILL BE POSSIBLE IN THE NEXT COUPLE OF HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... RUNOFF FROM HEAVY RAIN WILL CAUSE FLOODING OF CREEKS AND STREAMS, URBAN AREAS, HIGHWAYS, STREETS, AND UNDERPASSES. LOW LYING PLACES THAT NORMALLY FLOOD COULD BECOME DEATH TRAPS. IF YOU COME TO A FLOODED OR CLOSED ROAD...TURN AROUND! DON'T DROWN! THIS IS A LIFE THREATENING SITUATION. TO REPORT FLOODING...PLEASE CONTACT THE NATIONAL WEATHER SERVICE OFFICE IN MORRISTOWN. && LAT...LON 3605 8404 3608 8387 3593 8375 3587 8393 $$ DMG
459 WGUS74 KMRX 030011 FFSMRX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MORRISTOWN TN 811 PM EDT MON APR 2 2012 TNC093-030115- /O.CON.KMRX.FF.W.0003.000000T0000Z-120403T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KNOX TN- 811 PM EDT MON APR 2 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM FOR KNOX COUNTY... AT 805 PM...DOPPLER RADAR INDICATED THAT RAINFALL HAS ENDED ACROSS THE WARNED AREA...BUT RUNOFF FROM EARLIER RAINFALL WILL LIKELY CONTINUE TO PRODUCE SOME FLOODING FOR THE NEXT HOUR. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 3605 8404 3608 8387 3593 8375 3587 8393 $$ DMG
The office that day
Everything else NWS Morristown, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 2, 5:04 PM EDT | Severe Thunderstorm Warning | MRX | Blount, Knox, Sevier | 41 min |
| Apr 2, 5:42 PM EDT | Areal Flood Advisory | MRX | Blount, Knox, Sevier | 2 hr |
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.