Alert archive / Texas / River Flood Warnings in 2021

River Flood Warning 78, NWS Shreveport, LA

May 11, 2021Cass County, Marion County, Texas

NWS Shreveport, LA issued this river flood warning at May 11, 2021, 8:23 PM CDT for Cass County, Marion County, Texas. It took effect at May 13, 2021, 5:00 AM CDT. It was in force for 20 days.

The area

The outline as issued.

The facts

Issued: May 11, 2021, 8:23 PM CDT (01:23 UTC)
In effect from: May 13, 2021, 5:00 AM CDT
Expired: Jun 1, 2021, 8:23 PM CDT
In force: 20 days
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: Minor

Counties Cass County, TX, Marion County, TX

The radar

The Shreveport radar (KSHV), 69 km from the middle of the area, began a volume at 01:22 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 Black Cypress Bayou near Jefferson (JEFT2). The gauge peaked at 15.94 ft at May 22, 2021, 9:00 PM CDT.

Action stage: 12.5 ft
Minor stage: 13 ft
Moderate stage: 18 ft
Major stage: 21 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07346045, 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.

053 
WGUS44 KSHV 120123
FLWSHV

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Shreveport LA
823 PM CDT Tue May 11 2021

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

  Black Cypress Bayou At Jefferson affecting Marion and Cass 
  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.

&&

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


TXC067-315-130130-
/O.NEW.KSHV.FL.W.0078.210513T1000Z-000000T0000Z/
/JEFT2.1.ER.210513T1000Z.210515T0600Z.000000T0000Z.NO/
823 PM CDT Tue May 11 2021

The National Weather Service in Shreveport has issued a

* Flood Warning for
  the Black Cypress Bayou At Jefferson.
* From late Wednesday night until further notice.
* At 8:00 PM CDT Tuesday the stage was 11.1 feet.
* Flood stage is 13.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage early 
  Thursday morning and continue rising to a crest of 15.0 feet early 
  Saturday morning.
* Impact...At 15.0 feet, Minor lowland flooding.


&&

LAT...LON 3297 9448 3275 9425 3275 9433 3278 9440
      3289 9450

$$

25

3 follow-up statements

322 
WGUS84 KSHV 121447
FLSSHV

Flood Statement
National Weather Service Shreveport LA
947 AM CDT Wed May 12 2021

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

  Black Cypress Bayou At Jefferson affecting Marion and Cass 
  Counties.

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

  Little Cypress Bayou Near Jefferson affecting Marion, Upshur, 
  Harrison and Gregg 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


TXC067-315-131630-
/O.EXT.KSHV.FL.W.0078.210513T2100Z-000000T0000Z/
/JEFT2.1.ER.210513T2100Z.210515T1200Z.000000T0000Z.NO/
947 AM CDT Wed May 12 2021

...The Flood Warning is now in effect until further notice...

The Flood Warning continues for
  the Black Cypress Bayou At Jefferson.
* From Thursday afternoon until further notice.
* At 9:00 AM CDT Wednesday the stage was 11.8 feet.
* Flood stage is 13 feet.
* Minor flooding is forecast.
* Forecast...The Black Cypress Bayou is expected to rise above flood 
  stage Thursday  afternoon and continue rising to a crest of 14.0 
  feet Saturday morning.
* Impact...At 13.0 feet, Lowland flooding will affect mainly timber 
  resources.


&&

LAT...LON 3297 9448 3275 9425 3275 9433 3278 9440
      3289 9450

$$

TXC183-203-315-459-131630-
/O.CON.KSHV.FL.W.0079.000000T0000Z-000000T0000Z/
/JFFT2.1.ER.210512T0055Z.210513T1800Z.000000T0000Z.NO/
947 AM CDT Wed May 12 2021

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

The Flood Warning continues for
  the Little Cypress Bayou Near Jefferson.
* Until further notice.
* At 9:15 AM CDT Wednesday the stage was 14.0 feet.
* Flood stage is 13 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum bayou stage in the 24 hours ending 
  at 9:15 AM CDT Wednesday was 14.0 feet.
* Forecast...The Little Cypress Bayou is expected to rise to a crest 
  of 15.0 feet early Thursday afternoon.
* Impact...At 14.0 feet, Expect minor lowland flooding to continue 
  for several days.


&&

LAT...LON 3267 9470 3265 9448 3276 9427 3272 9425
      3260 9459

$$

08

608 
WGUS84 KSHV 130344
FLSSHV

Flood Statement
National Weather Service Shreveport LA
1044 PM CDT Wed May 12 2021

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

  Black Cypress Bayou At Jefferson affecting Marion and Cass 
  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


TXC067-315-140345-
/O.EXT.KSHV.FL.W.0078.210513T1800Z-000000T0000Z/
/JEFT2.1.ER.210513T1800Z.210515T1200Z.000000T0000Z.NO/
1044 PM CDT Wed May 12 2021

...The Flood Warning is now in effect until further notice...

The Flood Warning continues for
  the Black Cypress Bayou At Jefferson.
* From Thursday afternoon until further notice.
* At 8:00 PM CDT Wednesday the stage was 11.8 feet.
* Flood stage is 13 feet.
* Minor flooding is forecast.
* Forecast...The Black Cypress Bayou is expected to rise above flood 
  stage Thursday  afternoon and continue rising to a crest of 14 
  feet Saturday morning.
* Impact...At 13 feet, Lowland flooding will affect mainly timber 
  resources.


&&

LAT...LON 3297 9448 3275 9425 3275 9433 3278 9440
      3289 9450

$$

16

826 
WGUS84 KSHV 131449
FLSSHV

Flood Statement
National Weather Service Shreveport LA
949 AM CDT Thu May 13 2021

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

  Black Cypress Bayou At Jefferson affecting Marion and Cass 
  Counties.

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

  Little Cypress Bayou Near Jefferson affecting Marion, Upshur, 
  Harrison and Gregg Counties.

TXC067-315-131600-
/O.CAN.KSHV.FL.W.0078.210513T1800Z-210513T1449Z/
/JEFT2.1.ER.210513T1800Z.210515T1200Z.000000T0000Z.NO/
949 AM CDT Thu May 13 2021

...The Flood Warning for the Black Cypress Bayou At Jefferson has 
been cancelled...

The Flood Warning is cancelled for
  the Black Cypress Bayou At Jefferson.
* At 9:00 AM CDT Thursday the stage was 11.9 feet.
* Flood stage is 13 feet.
* Forecast...The Black Cypress Bayou is expected to rise to a crest 
  of 12.5 feet Saturday morning.


&&

LAT...LON 3297 9448 3275 9425 3275 9433 3278 9440
      3289 9450

$$

TXC183-203-315-459-141630-
/O.EXT.KSHV.FL.W.0079.000000T0000Z-210516T1800Z/
/JFFT2.1.ER.210512T0055Z.210513T0615Z.210516T0000Z.NO/
949 AM CDT Thu May 13 2021

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

The Flood Warning continues for
  the Little Cypress Bayou Near Jefferson.
* Until Sunday afternoon.
* At 9:15 AM CDT Thursday the stage was 14.2 feet.
* Flood stage is 13 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum bayou stage in the 24 hours ending 
  at 9:15 AM CDT Thursday was 14.3 feet.
* Forecast...The Little Cypress Bayou is expected to fall below 
  flood stage Saturday evening and continue falling to 9.4 feet 
  Tuesday morning.
* Impact...At 14.0 feet, Expect minor lowland flooding to continue 
  for several days.


&&

LAT...LON 3267 9470 3265 9448 3276 9427 3272 9425
      3260 9459

$$

08

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:55 PM CDT	River Flood Warning	SHV	Wood	3 days
May 11, 7:57 PM CDT	River Flood Warning	SHV	Gregg, Rusk	4 days
May 11, 7:58 PM CDT	River Flood Warning	SHV	Gregg, Harrison, Panola, Rusk	4 days
May 11, 8:17 PM CDT	River Flood Warning	SHV	Nacogdoches, Rusk	36 hr
May 11, 8:24 PM CDT	River Flood Warning	SHV	Gregg, Harrison, Marion, Upshur	4 days
May 12, 8:34 AM CDT	River Flood Warning	SHV	Angelina, Jasper, Polk, Tyler	20 days

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.