Storm Prediction Center Severe Thunderstorm Watch 400
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4 hours ago
Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended. Note: Click for Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 400
NWS Storm Prediction Center Norman OK
150 AM CDT Mon Jun 9 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Louisiana
Southeast and Central Texas
Coastal Waters
* Effective this Monday morning from 150 AM until 700 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A line of intense thunderstorms will sag southward
overnight across the watch area, posing a risk of damaging wind
gusts and some hail.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 35 miles north
northwest of Austin TX to 10 miles east northeast of Lafayette LA.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU0).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 399...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Hart
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 400
NWS Storm Prediction Center Norman OK
150 AM CDT Mon Jun 9 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Louisiana
Southeast and Central Texas
Coastal Waters
* Effective this Monday morning from 150 AM until 700 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 75
mph possible
Isolated very large hail events to 2 inches in diameter possible
SUMMARY...A line of intense thunderstorms will sag southward
overnight across the watch area, posing a risk of damaging wind
gusts and some hail.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 35 miles north
northwest of Austin TX to 10 miles east northeast of Lafayette LA.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU0).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 399...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 400 SEVERE TSTM LA TX CW 090650Z - 091200Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
35NNW AUS/AUSTIN TX/ - 10ENE LFT/LAFAYETTE LA/
..AVIATION COORDS.. 40NM N/S /31NW CWK - 30WSW BTR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 28035.
LAT...LON 31429793 30919183 29609183 30129793
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 400 Status Report Messages:
STATUS REPORT #1 ON WW 400
VALID 090725Z - 090840Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BENTLEY..06/09/25
ATTN...WFO...LCH...FWD...HGX...EWX...
&&
STATUS REPORT FOR WS 400
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC001-003-009-011-019-023-039-053-055-079-097-113-115-090840-
LA
. LOUISIANA PARISHES INCLUDED ARE
ACADIA ALLEN AVOYELLES
BEAUREGARD CALCASIEU CAMERON
EVANGELINE JEFFERSON DAVIS LAFAYETTE
RAPIDES ST. LANDRY VERMILION
VERNON
$$
TXC027-039-041-051-071-099-145-157-167-185-199-201-225-241-245-
281-287-291-313-331-333-339-351-361-373-407-455-457-471-473-477-
491-090840-
TX
. TEXAS COUNTIES INCLUDED ARE
BELL BRAZORIA BRAZOS
BURLESON CHAMBERS CORYELL
FALLS FORT BEND GALVESTON
GRIMES HARDIN HARRIS
HOUSTON JASPER JEFFERSON
LAMPASAS LEE LIBERTY
MADISON MILAM MILLS
MONTGOMERY NEWTON ORANGE
POLK SAN JACINTO TRINITY
TYLER WALKER WALLER
WASHINGTON WILLIAMSON
$$
GMZ335-430-432-090840-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
GALVESTON BAY
SABINE LAKE
CALCASIEU LAKE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Probability of 1 or more strong (EF2-EF5) tornadoes
Low (<2%)
Wind
Probability of 10 or more severe wind events
Mod (50%)
Probability of 1 or more wind events > 65 knots
Mod (30%)
Hail
Probability of 10 or more severe hail events
Mod (30%)
Probability of 1 or more hailstones > 2 inches
Mod (30%)
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
High (70%)
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The “Low” category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
“Moderate” from 30% to 60%, and “High” from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
