River Flood Warning 31, NWS Shreveport, LA

131 
WGUS84 KSHV 031455
FLSSHV

Flood Statement
National Weather Service Shreveport LA
855 AM CST Wed Mar 3 2021

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

  Big Cypress Bayou At Caddo Lake affecting Caddo, Marion, Harrison 
  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


LAC017-TXC067-203-315-041630-
/O.CON.KSHV.FL.W.0031.000000T0000Z-000000T0000Z/
/LCOL1.1.UU.210304T0600Z.210304T0600Z.000000T0000Z.NO/
855 AM CST Wed Mar 3 2021

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

The Flood Warning continues for
  the Big Cypress Bayou At Caddo Lake.
* Until further notice.
* At 6:00 AM CST Wednesday the pool stage was 171.8 feet.
* Flood pool stage is 172 feet.
* Minor flooding is forecast.
* Forecast...The bayou is expected to crest near 172 feet by 
  Thursday morning.
* Impact...Minor lowland flooding of camps and trails.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

08

917 
WGUS84 KSHV 040444
FLSSHV

Flood Statement
National Weather Service Shreveport LA
1044 PM CST Wed Mar 3 2021

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

  Big Cypress Bayou At Caddo Lake affecting Caddo, Marion, Harrison 
  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


LAC017-TXC067-203-315-050445-
/O.CON.KSHV.FL.W.0031.000000T0000Z-000000T0000Z/
/LCOL1.1.UU.210304T0600Z.210304T0600Z.000000T0000Z.NO/
1044 PM CST Wed Mar 3 2021

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

The Flood Warning continues for
  the Big Cypress Bayou At Caddo Lake.
* Until further notice.
* At 6:00 AM CST Wednesday the stage was 171.8 feet.
* Flood stage is 172.0 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage just 
  after midnight tonight and continue rising to 172.0 feet just 
  after midnight tonight. Additional rises are possible thereafter.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

20

098 
WGUS84 KSHV 041618
FLSSHV

Flood Statement
National Weather Service Shreveport LA
1018 AM CST Thu Mar 4 2021

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

  Big Cypress Bayou At Caddo Lake affecting Caddo Parish and 
  Marion,    Harrison, 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


LAC017-TXC067-203-315-051800-
/O.CON.KSHV.FL.W.0031.000000T0000Z-000000T0000Z/
/LCOL1.1.UU.000000T0000Z.210304T1300Z.000000T0000Z.NO/
1018 AM CST Thu Mar 4 2021

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

The Flood Warning continues for
  the Big Cypress Bayou At Caddo Lake.
* Until further notice.
* At 7:00 AM CST Thursday the pool stage was 172 feet.
* Flood pool stage is 172 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum pool stage in the 24 hours ending at 
  7:00 AM CST Thursday was 172.0 feet.
* Forecast...Expect little change through Friday morning as the lake 
  crests at 172 feet.
* Impact...Minor lowland flooding of camps and trails.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

08

065 
WGUS84 KSHV 050454 RRA
FLSSHV

Flood Statement
National Weather Service Shreveport LA
1054 PM CST Thu Mar 4 2021

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

  Big Cypress Bayou At Caddo Lake affecting Caddo, Marion, Harrison 
  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


LAC017-TXC067-203-315-060500-
/O.CON.KSHV.FL.W.0031.000000T0000Z-000000T0000Z/
/LCOL1.1.UU.000000T0000Z.210304T1300Z.000000T0000Z.NO/
1054 PM CST Thu Mar 4 2021

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

The Flood Warning continues for
  the Big Cypress Bayou At Caddo Lake.
* Until further notice.
* At 7:00 AM CST Thursday the stage was 172.0 feet.
* Flood stage is 172.0 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Recent Activity...The maximum river stage in the 24 hours ending 
  at 7:00 AM CST Thursday was 172.0 feet.
* Forecast...The river is expected to remain steady at flood stage.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

20

367 
WGUS84 KSHV 051512
FLSSHV

Flood Statement
National Weather Service Shreveport LA
912 AM CST Fri Mar 5 2021

...The Flood Warning continues for the following bayous in 
Louisiana...Texas...

  Big Cypress Bayou At Caddo Lake affecting Caddo Parish, and 
  Marion, Harrison, and Cass Counties.

  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


LAC017-TXC067-203-315-061645-
/O.CON.KSHV.FL.W.0031.000000T0000Z-000000T0000Z/
/LCOL1.1.UU.000000T0000Z.210304T1300Z.000000T0000Z.NO/
912 AM CST Fri Mar 5 2021

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

The Flood Warning continues for
  the Big Cypress Bayou At Caddo Lake.
* Until further notice.
* The estimated Friday morning pool stage was near 172 feet.
* Flood pool stage is 172 feet.
* Minor flooding is forecast.
* Forecast...The lake is expected to remain steady near 172 feet 
  into Saturday morning.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

TXC067-315-061645-
/O.CON.KSHV.FL.W.0022.000000T0000Z-210309T0600Z/
/JEFT2.1.ER.210301T1018Z.210303T0915Z.210308T1200Z.NO/
912 AM CST Fri Mar 5 2021

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

The Flood Warning continues for
  the Black Cypress Bayou At Jefferson.
* Until late Monday night.
* At 9:00 AM CST Friday the stage was 14.7 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 9:00 AM CST Friday was 15.3 feet.
* Forecast...The bayou is expected to fall below flood stage Monday 
  morning and continue falling to 11.7 feet Wednesday morning.
* Impact...Minor lowland flooding to diminish and end through Monday 
  morning.


&&

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

$$

08

902 
WGUS84 KSHV 061540
FLSSHV

Flood Statement
National Weather Service Shreveport LA
940 AM CST Sat Mar 6 2021

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

  Big Cypress Bayou At Caddo Lake affecting Caddo, Marion, Harrison 
  and Cass Counties.

LAC017-TXC067-203-315-061645-
/O.CAN.KSHV.FL.W.0031.000000T0000Z-210306T1540Z/
/LCOL1.1.UU.000000T0000Z.210304T1300Z.000000T0000Z.NO/
940 AM CST Sat Mar 6 2021

...The Flood Warning for the Big Cypress Bayou At Caddo Lake has 
been cancelled...

The Flood Warning is cancelled for
  the Big Cypress Bayou At Caddo Lake.
* At 7:00 AM CST Saturday the stage was 171.9 feet.
* Flood stage is 172.0 feet.
* Forecast...The river is expected to remain steady below flood 
  stage at 171.9 feet.


&&

LAT...LON 3278 9418 3281 9400 3270 9392 3265 9404
      3267 9412

$$

Area Forecast Discussion
National Weather Service Shreveport LA
607 AM CST Tue Mar 2 2021

.AVIATION...

Seeing the last of the rain moving into the TXK and TYR terminals
as we speak as an upper level trough will move ovhd later today.
Ceilings are mostly in the 4-10kft range this morning with the
exception of the LFK terminal which continues to deal with IFR
ceilings. Not seeing any reduction in VSBYS with the remaining
rainfall this morning but could not rule out MVFR VSBYS at the
ELD/MLU or LFK terminals until we can get the precipitation east
of all our terminal locations later this afternoon. Have also
cleared cloud cover out from west to east across our airspace in
this TAF package as well. Look for N to NE winds today near 10kts
or less with winds becoming light and variable to near calm this
evening into the overnight hours.

Introduced MVFR VSBYS across most terminal locations near or
after 06z tonight given the wet soils, clear skies and light
winds.

13

&&

.PREV DISCUSSION... /issued 401 AM CST Tue Mar 2 2021/

SHORT TERM.../Today through Wednesday/

Latest Water Vapor analysis showing a vigorous upper level trough
spinning across SW OK/N TX attm with widespread rainfall confined
to RRQ of 135kt upper jet streak across Deep East Texas into
Northern Miss attm. Water Vapor also showing an area of much drier
air from Central TX north and east into the Middle Red River
Valley of NE TX/SE OK and SW AR and it's this drier air that is
choking off any more than just lighter returns near and northwest
of a Lufkin, Texas to Shreveport, Louisiana to El Dorado, Arkansas
line. Enhanced area of lift underneath and just to the east of the
eastward moving trough should help to overcome the drier air in
place somewhat as we go through the day across at least the
northern half but the general trend should be for decreasing
precipitation chances as we go through the day from west to east.
Having said that, highest pops today are obviously warranted across
our southeast third tapering pops back to low end chance variety
across our western third early this morning with precipitation
quickly exiting the region from west to east, ending across our
eastern third by late afternoon. Should see the sun returning as
well across all but our southeast third by late this afternoon
which will allow for a descent warmup with upper 50s possible
across our west. Cooler temperatures due to longer duration of
precip and cloud cover across our east with highs near 50.

Sfc ridge axis builds across our region overnight with winds
becoming light and with clearing skies, that should set the stage
for descent radiational cooling conditions. Given the wet soil, it
could also set the stage for the development of patchy fog.
Assuming we do see this fog development and temperatures are
allowed to fall through the dewpoint, then that patchy fog could
develop into freezing fog. Will need to keep a close eye on this
overnight as dense freezing fog could result in some travel issues
during the predawn hours Wed Morning.

That sfc ridge will shift slowly eastward on Wednesday allowing
for a nice warmup areawide with afternoon highs ranging in the 60s
areawide.

13

LONG TERM.../Wednesday Night through Monday/

Northwest flow continues to start the long term period, as a surface
ridge axis gradually proceeds eastward across the Ark-La-Tex into
the Mississippi River Valley. Calm surface winds prevail until
Thursday afternoon, before lightly picking up out of the southeast,
as the surface ridge axis exits. At the same time, the next
shortwave begins to exit the Rocky Mountains, boosting precipitation
chances by Friday morning. That said, rainfall will remain
unimpressive with WPC seven-day QPF values expected to stay below an
inch at the moment. After the shortwave exits by Saturday afternoon,
the next ridge enters the area, with the ridge axis over the Ark-La-
Tex by Sunday afternoon. Surface winds return out of the southeast
and intensify by Monday afternoon, maintaining warm air advection
into the beginning of the work week.

Throughout the full long-term period, near average temperatures in
the mid-60s for highs and low-40s for lows, will be maintained with
certain exceptions before and after the main disturbance arrives on
Friday. That includes enhanced radiational cooling on Wednesday
night as cleared skies and calm winds drive temperatures down to the
upper 30s, and highs boosted into the low 70s on Thursday and Monday
afternoon from warm air advection. Outside of Friday and Saturday,
dry conditions are expected through the long term period.

/16/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  52  32  64  39 /  50   0   0   0
MLU  48  33  62  38 / 100   0   0   0
DEQ  55  29  65  36 /  30   0   0   0
TXK  54  32  63  39 /  40   0   0   0
ELD  48  30  63  36 /  70   0   0   0
TYR  57  34  66  41 /  30   0   0   0
GGG  56  32  64  38 /  40   0   0   0
LFK  58  34  66  39 /  50   0   0   0

&&

.SHV WATCHES/WARNINGS/ADVISORIES...
AR...None.
LA...None.
OK...None.
TX...None.
&&

13/13/16

Hazardous Weather Outlook
National Weather Service Shreveport LA
459 AM CST Tue Mar 2 2021

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-031100-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-
Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-
Panola-Nacogdoches-Shelby-Angelina-San Augustine-
459 AM CST Tue Mar 2 2021

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...Today and Tonight...

Wet weather ends today and skies clear out by this afternoon,
enhancing radiational cooling as winds relax. This sets the stage
for patchy fog and patchy freezing fog tonight. If patchy freezing
fog becomes dense, bridges and overpasses can become slick with
ice.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

Rainfall returns to the area by Friday, however, nuisance
flooding across low lying and poor drainage areas would be the
maximum impact expected.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency management personnel...amateur radio
operators...and storm spotters will not be needed through tonight.

16