Alert archive / Texas / Flash Flood Warnings in 2015
Flash Flood Warning 21, NWS Amarillo, TX
NWS Amarillo, TX issued this flash flood warning at Jul 20, 2015, 10:40 PM CDT for Potter County, Randall County, Texas. It was in force for 3 hr. 7 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
- Jul 20, 2015, 10:40 PM CDT (03:40 UTC)
- Expired
- Jul 21, 2015, 2:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Amarillo, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Potter County, TX, Randall County, TX
The radar
The Amarillo radar (KAMA), 18 km from the middle of the area, began a volume at 03:43 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 20, 10:42 PM CDT | FLASH FLOOD | 1 Wnw Amarillo, TX | HIGH WATER RESCUE AT 11TH AND PIERCE STREETS IN DOWNTOWN AMARILLO. |
| Jul 20, 10:43 PM CDT | FLASH FLOOD | 3 W Amarillo, TX | MAJOR FLOODING AT WASHINGTON STREET AND INTERSTATE 40. |
| Jul 20, 10:47 PM CDT | FLASH FLOOD | 1 Nw Amarillo, TX | HIGH WATER RESCUE AT 3RD AVENUE AND BUCHANAN STREET IN DOWNTOWN AMARILLO. |
| Jul 20, 10:53 PM CDT | FLASH FLOOD | 5 W Amarillo, TX | HIGH WATER RESCUE DUE TO FLASH FLOOD AT AVONDALE AND INTERSTATE 40. |
| Jul 20, 11:15 PM CDT | FLASH FLOOD | 2 W Amarillo, TX | MULTIPLE REPORTS OF HIGH WATER RESCUES AND CLOSED ROADS AND HIGHWAYS AROUND DOWNTOWN AMARILLO AND INTERSTATE 40 DUE TO FLASH FLOODING. |
| Jul 20, 11:15 PM CDT | FLASH FLOOD | 8 Sw Amarillo, TX | MULTIPLE REPORTS OF HIGH WATER RESCUES AND CLOSED ROADS BETWEEN LOOP 335 AND OSAGE STREET AND SOUTH OF INTERSTATE 40 DUE TO FLASH FLOODING. |
| Jul 20, 11:15 PM CDT | FLASH FLOOD | Amarillo, TX | 34TH AT GEORGIA STREET IS A RIVER AND 34TH BETWEEN ROSS OSAGE STREETS AND GEORGIA STREET IS DOWN TO ONE LANE. |
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, 3.7 hours before the alert went out and 18 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
- 1981 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1533 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
310 WGUS54 KAMA 210340 FFWAMA TXC375-381-210700- /O.NEW.KAMA.FF.W.0021.150721T0340Z-150721T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AMARILLO TX 1040 PM CDT MON JUL 20 2015 THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTH CENTRAL RANDALL COUNTY IN THE PANHANDLE OF TEXAS... SOUTH CENTRAL POTTER COUNTY IN THE PANHANDLE OF TEXAS... * UNTIL 200 AM CDT * AT 1036 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER AMARILLO. DOPPLER RADAR INDICATES UP TO 2 INCHES INCHES OF RAIN HAVE FALLEN OVER PARTS OF THE WARNED AREA IN THE PAST HOUR WITH ADDITIONAL HEAVY RAIN EXPECTED. FLASH FLOODING IS LIKELY TO OCCUR IN AMARILLO. AREA PLAYA LAKES ACROSS THE CITY MAY EXPERIENCE RISING WATER LEVELS. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... AMARILLO... PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL RESULT IN FLOODING OF MANY STREETS ACROSS THE CITY OF AMARILLO...ESPECIALLY IN POOR DRAINAGE AREAS. MOTORISTS ARE URGED TO AVOID FLOODED ROADWAYS AS THE HIGH WATER LEVELS...UP TO SEVERAL FEET DEEP IN SOME INSTANCES...MAY CAUSE CARS TO STALL AND POSE A HAZARD TO PUBLIC SAFETY. && LAT...LON 3537 10200 3537 10175 3509 10175 3509 10200 $$ BRB
3 follow-up statements
147 WGUS74 KAMA 210445 FFSAMA FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 1145 PM CDT MON JUL 20 2015 TXC375-381-210700- /O.CON.KAMA.FF.W.0021.000000T0000Z-150721T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POTTER TX-RANDALL TX- 1145 PM CDT MON JUL 20 2015 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL RANDALL AND SOUTH CENTRAL POTTER COUNTIES UNTIL 200 AM CDT... * AT 1145 PM CDT...THE PUBLIC REPORTED A THUNDERSTORM WITH VERY HEAVY RAINFALL 4 MILES NORTHWEST OF AMARILLO. DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAIN HAVE ALREADY FALLEN OVER PARTS OF THE WARNED AREA IN THE PAST 3 HOURS WITH ADDITIONAL HEAVY RAIN EXPECTED. FLOODING IS LIKELY TO OCCUR. WHILE PRECIPITATION MAY TAPER OFF IN SOME AREAS...IT WILL TAKE SOME TIME FOR ANY HIGH WATER TO RUNOFF. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... AMARILLO... PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL RESULT IN HIGH WATER LEVELS AT UNDERPASSES ALONG INTERSTATE 40...ESPECIALLY AT THE BELL AND WASHINGTON STREET BRIDGES. MOTORISTS ARE STRONGLY URGED TO REDUCE SPEEDS ON INTERSTATE 40 AND BE PREPARED TO BE DIVERTED OFF THE INTERSTATE SHOULD HIGH WATER BE OBSERVED. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL RESULT IN FLOODING OF MANY STREETS ACROSS THE CITY OF AMARILLO...ESPECIALLY IN POOR DRAINAGE AREAS. MOTORISTS ARE URGED TO AVOID FLOODED ROADWAYS AS THE HIGH WATER LEVELS...UP TO SEVERAL FEET DEEP IN SOME INSTANCES...MAY CAUSE CARS TO STALL AND POSE A HAZARD TO PUBLIC SAFETY. && LAT...LON 3537 10200 3537 10175 3509 10175 3509 10200 $$ SCHNEIDER
468 WGUS74 KAMA 210506 FFSAMA FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 1206 AM CDT TUE JUL 21 2015 TXC375-381-210700- /O.CON.KAMA.FF.W.0021.000000T0000Z-150721T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POTTER TX-RANDALL TX- 1206 AM CDT TUE JUL 21 2015 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL RANDALL AND SOUTH CENTRAL POTTER COUNTIES UNTIL 200 AM CDT... * AT 1207 AM CDT...THE PUBLIC REPORTED A THUNDERSTORM WITH VERY HEAVY RAINFALL 4 MILES NORTHWEST OF AMARILLO. DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAIN HAVE ALREADY FALLEN OVER PARTS OF THE WARNED AREA IN THE PAST 3 HOURS WITH ADDITIONAL HEAVY RAIN EXPECTED. FLOODING IS LIKELY TO OCCUR. WHILE PRECIPITATION MAY TAPER OFF IN SOME AREAS...IT WILL TAKE SOME TIME FOR ANY HIGH WATER TO RUNOFF. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... AMARILLO... PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM 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 ALSO SUBJECT TO FLOODING. && LAT...LON 3537 10200 3537 10175 3509 10175 3509 10200 $$ SCHNEIDER
339 WGUS74 KAMA 210605 FFSAMA FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AMARILLO TX 105 AM CDT TUE JUL 21 2015 TXC375-381-210700- /O.CON.KAMA.FF.W.0021.000000T0000Z-150721T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ POTTER TX-RANDALL TX- 105 AM CDT TUE JUL 21 2015 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTH CENTRAL RANDALL AND SOUTH CENTRAL POTTER COUNTIES UNTIL 200 AM CDT... * AT 106 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAINFALL 4 MILES NORTHWEST OF AMARILLO. DOPPLER RADAR ESTIMATES 1 TO 3 INCHES OF RAIN HAVE ALREADY FALLEN OVER PARTS OF THE WARNED AREA IN THE PAST 3 HOURS WITH ADDITIONAL HEAVY RAIN EXPECTED. FLOODING IS LIKELY TO OCCUR. WHILE PRECIPITATION MAY TAPER OFF IN SOME AREAS...IT WILL TAKE SOME TIME FOR ANY HIGH WATER TO RUNOFF. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... AMARILLO... PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 3537 10200 3537 10175 3509 10175 3509 10200 $$ SCHNEIDER
The office that day
Everything else NWS Amarillo, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 8:20 PM CDT | Areal Flood Advisory | AMA | Potter, Randall | 4 hr |
| Jul 20, 8:34 PM CDT | Special Weather Statement | AMA | Oldham | 26 min |
| Jul 20, 8:49 PM CDT | Special Weather Statement | AMA | Carson | 26 min |
| Jul 20, 9:05 PM CDT | Special Weather Statement | AMA | Oldham | 25 min |
| Jul 20, 11:14 PM CDT | Areal Flood Advisory | AMA | Dallam, Hartley, Oldham | 3 hr |
| Jul 20, 11:48 PM CDT | Areal Flood Advisory | AMA | Carson, Gray, Hutchinson, Roberts | 3 hr |
| Jul 21, 1:03 AM CDT | Areal Flood Advisory | AMA | Hemphill, Wheeler | 3 hr |
| Jul 21, 1:50 PM CDT | Areal Flood Warning | AMA | Potter, Randall | 32 hr |
Nearby
Flash Flood Warnings in Texas, 2015Every flash flood warning in 2015
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.