Alert archive / Texas / River Flood Warnings in 2021

River Flood Warning 55, NWS Shreveport, LA

April 30, 2021Sabine County, San Augustine County, Texas

NWS Shreveport, LA issued this river flood warning at Apr 30, 2021, 5:12 AM CDT for Sabine County, San Augustine County, Texas. It took effect at Apr 30, 2021, 10:47 AM CDT. It was in force for 34 hr.

The area

The outline as issued.

The facts

Issued: Apr 30, 2021, 5:12 AM CDT (10:12 UTC)
In effect from: Apr 30, 2021, 10:47 AM CDT
Expired: May 1, 2021, 8:55 PM CDT
In force: 34 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: Minor

Counties Sabine County, TX, San Augustine County, TX

The radar

The Ft Polk radar (KPOE), 115 km from the middle of the area, began a volume at 10:16 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 Ayish Bayou near San Augustine (AYIT2).

Action stage: 11.5 ft
Minor stage: 12 ft
Moderate stage: 16 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 08039100, 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.

416 
WGUS44 KSHV 301012
FLWSHV

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Shreveport LA
512 AM CDT Fri Apr 30 2021

...The National Weather Service in Shreveport LA has issued a Flood 
Warning for the following bayou in Texas...

  Ayish Bayou Near San Augustine affecting Sabine and San Augustine 
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive cars through flooded areas.
Caution is urged when walking near riverbanks.
A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

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

&&

For more hydrologic information, copy and paste the following website
address into your favorite web browser URL bar:
water.weather.gov/ahps2/index.php?wfo=shv


TXC403-405-011145-
/O.NEW.KSHV.FL.W.0055.210430T2100Z-210503T1649Z/
/AYIT2.1.ER.210430T2100Z.210501T1800Z.210502T2248Z.NO/
512 AM CDT Fri Apr 30 2021

The National Weather Service in Shreveport has issued a

* Flood Warning for
  the Ayish Bayou Near San Augustine.
* From this afternoon to Monday morning.
* At 4:15 AM CDT Friday the stage was 9.3 feet.
* Flood stage is 12 feet.
* Minor flooding is forecast.
* Forecast...The Ayish Bayou is expected to rise above flood stage 
  late this Friday afternoon to a crest of 13.9 feet early Saturday 
  afternoon. It will then fall below flood stage Sunday afternoon.
* Impact...Minor lowland flooding.


&&

LAT...LON 3156 9415 3155 9409 3139 9414 3130 9412
      3130 9416

$$

08

4 follow-up statements

597 
WGUS84 KSHV 301338
FLSSHV

Flood Statement
National Weather Service Shreveport LA
838 AM CDT Fri Apr 30 2021

...The Flood Warning is extended for the following bayou in Texas...

  Ayish Bayou Near San Augustine affecting Sabine and San Augustine 
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive cars through flooded areas.
Caution is urged when walking near riverbanks.
Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

&&

For more hydrologic information, copy and paste the following website
address into your favorite web browser URL bar:
water.weather.gov/ahps2/index.php?wfo=shv


TXC403-405-011515-
/O.EXT.KSHV.FL.W.0055.210430T1547Z-210503T2100Z/
/AYIT2.1.ER.210430T1547Z.210501T1800Z.210503T0300Z.NO/
838 AM CDT Fri Apr 30 2021

...The Flood Warning is now in effect until Monday afternoon...

The Flood Warning continues for
  the Ayish Bayou Near San Augustine.
* Until Monday afternoon.
* At 8:15 AM CDT Friday the stage was 11.8 feet.
* Flood stage is 12 feet.
* Minor flooding is forecast.
* Forecast...The Ayish Bayou is expected to rise above flood stage 
  late this Friday morning to a crest of 14.2 feet early Saturday 
  afternoon.  It will then fall below flood stage late Sunday 
  evening.
* Impact...Minor lowland flooding.


&&

LAT...LON 3156 9415 3155 9409 3139 9414 3130 9412
      3130 9416

$$

08

706 
WGUS84 KSHV 010129
FLSSHV

Flood Statement
National Weather Service Shreveport LA
829 PM CDT Fri Apr 30 2021

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

  Ayish Bayou Near San Augustine affecting Sabine and San Augustine 
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive cars through flooded areas.
Caution is urged when walking near riverbanks.
Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

&&

For more hydrologic information, copy and paste the following website
address into your favorite web browser URL bar:
water.weather.gov/ahps2/index.php?wfo=shv


TXC403-405-020130-
/O.EXT.KSHV.FL.W.0055.000000T0000Z-210503T1800Z/
/AYIT2.1.ER.210430T1451Z.210430T2100Z.210503T0000Z.NO/
829 PM CDT Fri Apr 30 2021

...The Flood Warning is now in effect until early Monday afternoon...

The Flood Warning continues for
  the Ayish Bayou Near San Augustine.
* Until Monday afternoon.
* At 7:15 PM CDT Friday the stage was 15.5 feet.
* Flood stage is 12.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 7:15 PM CDT Friday was 16.3 feet.
* Forecast...The river is expected to rise to a crest of 14.1 feet 
  early tomorrow afternoon. It will then fall below flood stage 
  Sunday evening.
* Impact...At 14.5 feet, Minor lowland flooding of boat ramps.


&&

LAT...LON 3156 9415 3155 9409 3139 9414 3130 9412
      3130 9416

$$

477 
WGUS84 KSHV 011555
FLSSHV

Flood Statement
National Weather Service Shreveport LA
1055 AM CDT Sat May 1 2021

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

  Ayish Bayou Near San Augustine affecting Sabine and San Augustine 
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive cars through flooded areas.
Caution is urged when walking near riverbanks.
Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

A Flood Warning means that flooding is imminent or occurring. All 
interested parties should take necessary precautions immediately.

&&

For more hydrologic information, copy and paste the following website
address into your favorite web browser URL bar:
water.weather.gov/ahps2/index.php?wfo=shv


TXC403-405-021600-
/O.EXT.KSHV.FL.W.0055.000000T0000Z-210502T1800Z/
/AYIT2.1.ER.210430T1451Z.210430T2100Z.210502T0000Z.NO/
1055 AM CDT Sat May 1 2021

...The Flood Warning is now in effect until early tomorrow 
afternoon...

The Flood Warning continues for
  the Ayish Bayou Near San Augustine.
* Until Sunday afternoon.
* At 10:15 AM CDT Saturday the stage was 12.4 feet.
* Flood stage is 12.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 10:15 AM CDT Saturday was 16.3 feet.
* Forecast...The river is expected to fall below flood stage this 
  evening and continue falling to 7.4 feet Thursday morning.
* Impact...At 12.0 feet, Lowland flooding of the heavily wooded 
  floodplain will continue for the next several days.


&&

LAT...LON 3156 9415 3155 9409 3139 9414 3130 9412
      3130 9416

$$

10

926 
WGUS84 KSHV 020155
FLSSHV

Flood Statement
National Weather Service Shreveport LA
855 PM CDT Sat May 1 2021

...The Flood Warning is extended for the following bayou in Texas...

  Ayish Bayou Near San Augustine affecting Sabine and San Augustine 
  Counties.

TXC403-405-020300-
/O.CAN.KSHV.FL.W.0055.000000T0000Z-210502T0155Z/
/AYIT2.1.ER.210430T1451Z.210430T2100Z.210502T0000Z.NO/
855 PM CDT Sat May 1 2021

...The Flood Warning for the Ayish Bayou Near San Augustine has been 
cancelled...

The Flood Warning is cancelled for
  the Ayish Bayou Near San Augustine.
* At 8:15 PM CDT Saturday the stage was 11.8 feet.
* Flood stage is 12 feet.
* Forecast...The river is expected to fall to 6.6 feet Thursday 
  evening.


&&

LAT...LON 3156 9415 3155 9409 3139 9414 3130 9412
      3130 9416

$$

16

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 11:15 PM CDT	Special Weather Statement	SHV	Shelby	45 min
Apr 30, 12:04 AM CDT	Special Weather Statement	SHV	Shelby	41 min
Apr 30, 12:39 AM CDT	Special Weather Statement	SHV	Shelby	51 min
Apr 30, 1:24 AM CDT	Special Weather Statement	SHV	Sabine	51 min
Apr 30, 3:28 AM CDT	Areal Flood Advisory	SHV	Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby	3 hr
Apr 30, 4:11 AM CDT	Flash Flood Warning	SHV	Angelina, Cherokee, Nacogdoches, San Augustine, Shelby	3 hr
Apr 30, 5:10 AM CDT	River Flood Warning	SHV	Nacogdoches, Rusk, San Augustine, Shelby	46 days
Apr 30, 5:14 AM CDT	River Flood Warning	SHV	Angelina, Houston, Polk, Trinity, Tyler	51 days
Apr 30, 6:22 AM CDT	Areal Flood Advisory	SHV	Angelina, Nacogdoches, Sabine, San Augustine	113 min
Apr 30, 7:18 AM CDT	River Flood Warning	SHV	Anderson, Cherokee, Houston, Trinity	13 hr
Apr 30, 9:39 AM CDT	River Flood Warning	SHV	Bowie, Red River	25 hr

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.