Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 6, NWS Amarillo, TX
NWS Amarillo, TX issued this flash flood warning at Aug 20, 2012, 7:55 PM CDT for Potter County, Texas. It was in force for 113 min. 4 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
- Aug 20, 2012, 7:55 PM CDT (00:55 UTC)
- Expired
- Aug 20, 2012, 9:48 PM CDT
- In force
- 113 min
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Potter County, TX
The radar
The Amarillo radar (KAMA), 32 km from the middle of the area, began a volume at 00:56 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 20, 7:58 PM CDT | FLASH FLOOD | Amarillo, TX | RESIDENTAL STREETS FLOODED AND IMPASSIBLE NEAR DOWNTOWN |
| Aug 20, 8:00 PM CDT | FLASH FLOOD | 1 E Amarillo, TX | UNDERPASSES NEAR INTERSTATE 40 AND SOUTH GRANT ARE FLOODED. TIME ESTIMATED. |
| Aug 20, 8:00 PM CDT | FLASH FLOOD | 6 Wnw Amarillo, TX | ROADS FLOODED NEAR MEDI PARK. TIME ESTIMATED. |
| Aug 20, 8:09 PM CDT | FLASH FLOOD | Amarillo, TX | EMERGENCY MANAGER REPORTED NUMEROUS FLOODED INTERSECTIONS AND VEHICLES STRANDED WITH WATER RESCUES BEING CONDUCTED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 0.9 hours before the alert went out and 33 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
- 284 J/kg
- Mixed-layer CIN
- -120 J/kg
- Mixed-layer LCL
- 2322 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 317 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.5
The text
As transmitted, in the capitals the NWS used until 2016.
606 WGUS54 KAMA 210055 FFWAMA TXC375-210400- /O.NEW.KAMA.FF.W.0006.120821T0055Z-120821T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AMARILLO TX 755 PM CDT MON AUG 20 2012 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * FLASH FLOOD WARNING FOR... POTTER COUNTY IN THE PANHANDLE OF TEXAS... THIS INCLUDES THE CITY OF AMARILLO... * UNTIL 1100 PM CDT * AT 754 PM CDT... LOCAL EMERGENCY MANAGEMENT OFFICIALS REPORTED FLASH FLOODING ALONG INTERSTATE 40 IN AND AROUND AMARILLO * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO AMARILLO. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL RESULT IN HIGH WATER LEVELS AT UNDERPASSES ALONG INTERSTATE 40. MOTORISTS ARE STRONGLY URGED TO REDUCE SPEEDS ON INTERSTATE 40 AND BE PREPARED TO BE DIVERTED OFF THE INTERSTATE SHOULD HIGH WATER BE OBSERVED. 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. TO REPORT FLOODING...PLEASE CALL THE NATIONAL WEATHER SERVICE AT 8 0 6 3 3 5 1 1 2 1. && LAT...LON 3562 10217 3562 10162 3519 10163 3519 10217 $$ MOULTON
1 follow-up statement
003 WGUS74 KAMA 210248 FFSAMA FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 948 PM CDT MON AUG 20 2012 TXC375-210258- /O.CAN.KAMA.FF.W.0006.000000T0000Z-120821T0400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POTTER TX- 948 PM CDT MON AUG 20 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR POTTER COUNTY... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED RAINFALL WAS ENDING ACROSS THE WARNED AREA...AND THE FLASH FLOOD THREAT WAS DIMINISHING. SOME MINOR FLOODING MAY CONTINUE...BUT THE THREAT OF SERIOUS FLOODING IS ENDING. THUS...THE FLASH FLOOD WARNING HAS BEEN CANCELLED. LAT...LON 3562 10217 3562 10162 3519 10163 3519 10217 $$ MOULTON
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 7:17 PM CDT | Areal Flood Advisory | AMA | Randall | 6 hr |
| Aug 20, 7:25 PM CDT | Severe Thunderstorm Warning | AMA | Deaf Smith, Randall | 50 min |
| Aug 20, 7:32 PM CDT | Severe Thunderstorm Warning | AMA | Carson, Hutchinson, Moore, Potter | 58 min |
| Aug 20, 7:48 PM CDT | Flash Flood Warning | AMA | Randall | 118 min |
| Aug 20, 7:49 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Randall | 56 min |
| Aug 20, 8:02 PM CDT | Areal Flood Advisory | AMA | Armstrong, Carson, Hutchinson | 4 hr |
| Aug 20, 8:31 PM CDT | Severe Thunderstorm Warning | AMA | Armstrong, Carson, Donley, Gray | 43 min |
| Aug 20, 8:51 PM CDT | Areal Flood Advisory | AMA | Donley | 4 hr |
Nearby
Flash Flood Warnings in Texas, 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.