Alert archive / Texas / River Flood Warnings in 2021

River Flood Warning 9, NWS Austin/San Antonio, TX

May 17, 2021Frio County, Texas

NWS Austin/San Antonio, TX issued this river flood warning at May 17, 2021, 9:21 AM CDT for Frio County, Texas. It took effect at May 17, 2021, 10:07 AM CDT. It was in force for 18 hr.

The area

The outline as issued.

The facts

Issued: May 17, 2021, 9:21 AM CDT (14:21 UTC)
In effect from: May 17, 2021, 10:07 AM CDT
Expired: May 18, 2021, 4:20 AM CDT
In force: 18 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: Minor

County Frio County, TX

The radar

The Laughlin AFB radar (KDFX), 129 km from the middle of the area, began a volume at 14:22 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.

The river

Written for the forecast point Frio River near Derby (DBYT2). The gauge peaked at 6.95 ft at May 17, 2021, 7:00 PM CDT.

Action stage: 6 ft
Minor stage: 6 ft
Moderate stage: 7 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 08205500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

956 
WGUS44 KEWX 171421
FLWEWX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Austin/San Antonio TX
921 AM CDT Mon May 17 2021

...The National Weather Service in Austin/San Antonio TX has issued 
a Flood Warning for the following rivers in Texas...

  Frio River Near Derby affecting Frio County.

For the Frio River...including Derby...Minor flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

Additional information is available at www.weather.gov.

The next statement will be issued this evening at 930 PM CDT.

&&


TXC163-180230-
/O.NEW.KEWX.FL.W.0009.210517T1507Z-210519T1830Z/
/DBYT2.1.ER.210517T1507Z.210518T0600Z.210519T0630Z.NO/
921 AM CDT Mon May 17 2021

The National Weather Service in Austin/San Antonio has issued a

* Flood Warning for
  the Frio River Near Derby.
* Until Wednesday afternoon.
* At 8:30 AM CDT Monday the stage was 5.8 feet.
* Flood stage is 6.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late 
  this morning to a crest of 6.7 feet just after midnight tonight. 
  It will then fall below flood stage early Wednesday morning.
* Impact...At 7.0 feet, Moderate lowland flooding closes Farm to 
  Market 1581 near Derby.
* Flood History...No available flood history.


&&

LAT...LON 2873 9920 2876 9912 2864 9902 2864 9910

$$

PLATT

3 follow-up statements

546 
WGUS44 KEWX 172011
FLWEWX

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Austin/San Antonio TX
311 PM CDT Mon May 17 2021

...Forecast flooding changed from Minor to Moderate severity and 
increased in duration for the following rivers in Texas...

  Frio River Near Derby affecting Frio County.

For the Frio River...including Concan, Dry Frio, Derby...Moderate 
flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

Additional information is available at www.weather.gov.

The next statement will be issued late tonight.

&&


TXC163-180815-
/O.EXT.KEWX.FL.W.0009.000000T0000Z-210519T2308Z/
/DBYT2.2.ER.210517T1445Z.210518T1200Z.210519T1108Z.NO/
311 PM CDT Mon May 17 2021

...Forecast flooding increased from Minor to Moderate severity and 
increased in duration until Wednesday evening...

The Flood Warning continues for
  the Frio River Near Derby.
* Until Wednesday evening.
* At 2:30 PM CDT Monday the stage was 6.6 feet.
* Flood stage is 6.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 2:30 PM CDT Monday was 6.6 feet.
* Forecast...The river will rise to 9.1 feet tomorrow morning. It 
  will then fall below flood stage Wednesday morning to 3.6 feet and 
  begin rising again early Thursday morning. It will rise to 4.9 
  feet early Friday morning. It will then fall again and remain 
  below flood stage.
* Impact...At 10.0 feet, Lowland flooding below Concan to Choke 
  Canyon Reservoir floods oil well pump jacks, irrigation pumps and 
  any equipment in the lower flood plain near and above Derby.
* Flood History...This crest compares to a previous crest of 9.1 
  feet on 10/12/2018.

&&


          Fld   Observed           Forecasts (1 pm CDT)     
Location  Stg   Stg   Day/Time     Tue   Wed   Thu          

Frio River
Derby     6.0   6.6   Mon 2 pm CDT 9.0   4.5   4.5          





&&

LAT...LON 2873 9920 2876 9912 2864 9902 2864 9910

$$

MO

957 
WGUS84 KEWX 180129
FLSEWX

Flood Statement
National Weather Service Austin/San Antonio TX
829 PM CDT Mon May 17 2021

...The Flood Warning continues for the following rivers in Texas...

  Frio River Near Derby affecting Frio County.

For the Frio River...including Derby...Moderate flooding is forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Flooding is occurring or is imminent. Most flood related deaths 
occur in automobiles. Do not attempt to cross water covered bridges, 
dips, or low water crossings. Never try to cross a flowing stream, 
even a small one, on foot. To escape rising water find another route 
over higher ground.

Additional information is available at www.weather.gov.

The next statement will be issued Tuesday morning at 830 AM CDT.

&&


TXC163-181330-
/O.CON.KEWX.FL.W.0009.000000T0000Z-210519T2308Z/
/DBYT2.2.ER.210517T1445Z.210518T1200Z.210519T1108Z.NO/
829 PM CDT Mon May 17 2021

...The Flood Warning remains in effect...

The Flood Warning continues for
  the Frio River Near Derby.
* Until Wednesday evening.
* At 7:30 PM CDT Monday the stage was 6.98 feet.
* Flood stage is 6.0 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 7:30 PM CDT Monday was 6.98 feet.
* Forecast...The river will rise to 9.2 feet tomorrow morning. It 
  will then fall below flood stage Wednesday morning to 4.0 feet and 
  begin rising again Thursday morning. It will rise to 4.4 feet 
  Thursday evening. It will then fall again and remain below flood 
  stage.
* Impact...At 10.0 feet, Lowland flooding below Concan to Choke 
  Canyon Reservoir floods oil well pump jacks, irrigation pumps and 
  any equipment in the lower flood plain near and above Derby.
* Flood History...This crest compares to a previous crest of 9.1 
  feet on 10/12/2018.

&&


          Fld   Observed           Forecasts (7 pm CDT)     
Location  Stg   Stg   Day/Time     Tue   Wed   Thu          

Frio River
Derby     6.0   7.0   Mon 7 pm CDT 8.4   4.4   4.4          





&&

LAT...LON 2873 9920 2876 9912 2864 9902 2864 9910

$$

BRADY

059 
WGUS84 KEWX 180920
FLSEWX

Flood Statement
National Weather Service Austin/San Antonio TX
420 AM CDT Tue May 18 2021

...The Flood Warning is cancelled for the following rivers in 
Texas...

  Frio River Near Derby affecting Frio County.

TXC163-181030-
/O.CAN.KEWX.FL.W.0009.000000T0000Z-210518T0920Z/
/DBYT2.2.ER.210517T1445Z.210518T0130Z.210518T0728Z.NO/
420 AM CDT Tue May 18 2021

...The Flood Warning for the Frio River Near Derby has been 
cancelled...

The Flood Warning is cancelled for
  the Frio River Near Derby.
* At 3:30 AM CDT Tuesday the stage was 5.6 feet.
* Flood stage is 6.0 feet.
* Forecast...The river has fallen below flood stage and is expected 
  to continue to fall.

&&


          Fld   Observed           Forecasts (7 am CDT)     
Location  Stg   Stg   Day/Time     Wed   Thu   Fri          

Frio River
Derby     6.0   5.6   Tue 3 am CDT 3.1   2.5   2.2          





&&

LAT...LON 2873 9920 2876 9912 2864 9902 2864 9910

$$

CP

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 17, 11:36 AM CDT	Special Weather Statement	EWX	Burnet	54 min
May 17, 11:58 AM CDT	Special Weather Statement	EWX	Burnet	47 min
May 17, 12:05 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Llano	55 min
May 17, 1:00 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Travis, Williamson	60 min
May 17, 1:53 PM CDT	Special Weather Statement	EWX	Bastrop, Hays, Travis, Williamson	52 min
May 17, 2:34 PM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 19 more	55 hr
May 17, 2:37 PM CDT	Special Weather Statement	EWX	Comal	38 min
May 17, 3:16 PM CDT	Special Weather Statement	EWX	Fayette, Gonzales	44 min
May 17, 3:25 PM CDT	Areal Flood Advisory	EWX	Fayette	3 hr
May 17, 3:51 PM CDT	Special Weather Statement	EWX	Comal	39 min
May 17, 3:59 PM CDT	Special Weather Statement	EWX	Gonzales, Lavaca	61 min
May 17, 4:15 PM CDT	Areal Flood Advisory	EWX	Gonzales, Lavaca	2 hr
May 17, 5:05 PM CDT	Special Weather Statement	EWX	Lavaca	40 min
May 17, 6:08 PM CDT	Special Weather Statement	EWX	Val Verde	52 min
May 17, 6:11 PM CDT	Special Weather Statement	EWX	Dimmit	49 min
May 17, 6:46 PM CDT	Special Weather Statement	EWX	Dimmit	44 min
May 17, 6:48 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	41 min
May 17, 6:50 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit	25 min

Nearby

River Flood Warnings in Texas, 2021 Every river flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.