Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 110, NWS Lake Charles, LA

May 3, 2017Jefferson County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at May 3, 2017, 9:39 PM CDT for Jefferson County, Texas. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 3, 2017, 9:39 PM CDT (02:39 UTC)
Expired: May 3, 2017, 10:45 PM CDT
In force: 66 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Jefferson County, TX

The radar

The Lake Charles radar (KLCH), 83 km from the middle of the area, began a volume at 02:43 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 3, 5:00 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 2.7 hours before the alert went out and 84 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1128 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 515 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 459 m²/s²
0-3 km storm-relative helicity: 554 m²/s²
Significant tornado parameter: 4.2
Supercell composite: 25.7

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS54 KLCH 040239
SVRLCH
TXC245-040345-
/O.NEW.KLCH.SV.W.0110.170504T0239Z-170504T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
939 PM CDT WED MAY 3 2017

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Jefferson County in southeastern Texas...

* Until 1045 PM CDT

* At 939 PM CDT, severe thunderstorms were located along a line
  extending from near Port Acres to near Winnie to near Gilchrist,
  moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Port Arthur, Nederland, Groves, Port Neches, Sabine Pass, Hamshire,
  Central Gardens, Fannett, La Belle, Port Acres, Southeast Texas
  Regional Airport and Sea Rim State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2994 9436 3001 9399 2998 9387 2993 9387
      2991 9389 2985 9393 2985 9394 2981 9395
      2977 9393 2977 9390 2974 9390 2972 9386
      2968 9385 2968 9403 2956 9435
TIME...MOT...LOC 0239Z 307DEG 27KT 2990 9399 2981 9433 2949 9443 

HAIL...1.00IN
WIND...60MPH
 
$$

13

1 follow-up statement

888 
WWUS54 KLCH 040300
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
1000 PM CDT WED MAY 3 2017

TXC245-040345-
/O.CON.KLCH.SV.W.0110.000000T0000Z-170504T0345Z/
Jefferson TX-
1000 PM CDT WED MAY 3 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTHEASTERN JEFFERSON COUNTY...

At 959 PM CDT, severe thunderstorms were located along a line
extending from Port Neches to 7 miles southeast of Hamshire to 9
miles southeast of High Island, moving southeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Port Arthur, Nederland, Groves, Port Neches, Sabine Pass, Port Acres,
Southeast Texas Regional Airport and Sea Rim State Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2980 9426 3001 9399 2998 9387 2993 9387
      2991 9389 2985 9393 2985 9394 2981 9395
      2977 9393 2977 9390 2974 9390 2972 9386
      2968 9385 2968 9403 2958 9431
TIME...MOT...LOC 0259Z 314DEG 22KT 2996 9395 2977 9423 2945 9430 

HAIL...1.00IN
WIND...60MPH
 
$$

13

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 3, 6:42 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, May 3, 6:42 PM CDT, 2 hours 57 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
642 PM CDT Wed May 3 2017

.DISCUSSION...
For the 04/00Z TAF Issuance.

&&

.AVIATION...
Clusters of showers and thunderstorms will continue at TAF sites
until a cold front/squall line move through during the evening
hours. After the cold front moves through, shower activity will
gradually end overnight with VFR conditions expected on Thursday.

Rua

&&

.PREV DISCUSSION... /issued 514 PM CDT Wed May 3 2017/

UPDATE...
Tornado Watch 190 has expired and Severe Thunderstorm Watch 192
has been issued for most of the area through midnight. The watch
covers all but the easternmost zones.

24

PREV DISCUSSION... /issued 441 PM CDT Wed May 3 2017/

SYNOPSIS...
Very busy day with severe weather this morning and flooding this
afternoon. A band of 5 to 8 inches of rainfall fell from northeast
Hardin County across southern Jasper and Newton Counties into
Calcasieu and Jeff Davis Parishes in southwest LA. Several reports
of flooding have been received, with significant flooding
affecting portions of Lake Charles requiring issuance of a Flash
Flood Emergency.

Additional storms continue to develop acrs northern portions of
the CWA ahead of a cold front that extends from the TX/LA border
west of SHV southwest toward Austin.

24

DISCUSSION...
The risk of severe weather and flooding continues across the area
this evening until the passage of the cold front. A tornado watch
remains in effect through 5 PM and an additional watch is likely
to be issued for the evening hours. The Flash Flood Watch remains
in effect through Thursday morning as an additional 3 to 5 inches
of rainfall will be possible as the convection north of the area
evolves into a squall line. Left the wind advisory in effect
across the coastal parishes and county as gusty southerly winds
will continue ahead of the front. The southerly flow will allow
water to pile up along the coast, leading to possible minor
coastal flooding this evening.

The potent upper level low and sfc cold front is expected to
move through the area this evening, and eventually east of the
region by 3 to 4 AM. This will bring an end to all the hazards
over the land zones as the drier air moves into the region. High
pres will build in behind the front overnight into Thursday bringing
much cooler and drier weather to the region for the next several
days.

24

MARINE...
MODERATE TO STRONG SOUTH TO SOUTHEAST WINDS WILL CONTINUE
TONIGHT AHEAD OF A COLD FRONT. THE INCREASED ONSHORE FLOW WILL
LEAD TO ELEVATED TIDES OF 1.5 TO 2.0 FEET ABOVE PREDICTED LEVELS
THIS EVENING AND OVERNIGHT. THE FRONT WILL MOVE ACROSS THE
COASTAL WATERS AFTER MIDNIGHT, WITH WINDS SHIFTING TO THE
NORTHWEST AND STRENGTHENING. NUMEROUS SHOWERS AND THUNDERSTORMS
WILL ACCOMPANY THE FRONT AS IT MOVES THROUGH. MODERATE TO STRONG
OFFSHORE FLOW IS EXPECTED THURSDAY THROUGH EARLY FRIDAY AS HIGH
PRESSURE BUILDS OVER THE REGION, WITH WINDS GRADUALLY SHIFTING TO
THE SOUTH BY SUNDAY.

24

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  52  70  50  76 / 100  10   0   0
LCH  56  73  53  78 / 100  10   0   0
LFT  58  73  53  77 / 100  10   0   0
BPT  55  74  53  79 / 100  10   0   0

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...Flash Flood Watch through Thursday morning for LAZ027>033-
     041>045-052>055-073-074.

     Coastal Flood Advisory until 1 AM CDT Thursday for LAZ073-074.

     Wind Advisory until 1 AM CDT Thursday for LAZ044-045-052>055-073-
     074.

     Wind Advisory until 7 PM CDT this evening for LAZ028-029-031>033-
     041>043.

     Coastal Flood Advisory until 4 AM CDT Thursday for LAZ052>054.

TX...Flash Flood Watch through Thursday morning for TXZ180-201-215-
     216-259>262.

     Coastal Flood Advisory until 1 AM CDT Thursday for TXZ215-216.

     Wind Advisory until 7 PM CDT this evening for TXZ215-216.

GM...Small Craft Advisory until 7 AM CDT Friday for GMZ470-472-475.

     Small Craft Advisory from 7 AM to 4 PM CDT Thursday for GMZ430-
     432-435.

     Small Craft Exercise Caution through Thursday morning for GMZ430-
     432-435.

     Small Craft Advisory until 1 AM CDT Friday for GMZ450-452-455.

&&

AVIATION...07

Hazardous weather outlook, May 3, 5:15 AM CDT, 16 hours 24 minutes before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
515 AM CDT Wed May 3 2017

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
041100-
Vernon-Rapides-Avoyelles-Beauregard-Allen-Evangeline-St. Landry-
Calcasieu-Jefferson Davis-Acadia-Lafayette-Upper St. Martin-
Vermilion-Iberia-St. Mary-Lower St. Martin-West Cameron-
East Cameron-Tyler-Hardin-Jefferson-Orange-Northern Jasper-
Northern Newton-Southern Jasper-Southern Newton-
515 AM CDT Wed May 3 2017

This Hazardous Weather Outlook is for portions of central
Louisiana, south central Louisiana, southwest Louisiana, west
central Louisiana, and southeast Texas.

.DAY ONE...Today and Tonight
Rapid changes with deteriorating weather conditions expected
today. The Storm Prediction Center has entire area with an Enhanced
Risk of severe thunderstorms, with large hail possible and
damaging winds the primary severe weather threat.

Moderate risk of excessive rainfall today with rain amounts of 3
to 6 inches are expected across Southern Louisiana, with isolated
amounts exceeding 8 inches possible. Elsewhere slight risk of
excessive rainfall with rain amounts of 2 to 3 inches are expected
with isolated amounts exceeding 5 inches possible across
Southeast Texas and Central Louisiana.

Elevated south to southeasterly winds will lead to elevated tides
of 1.5 to 2.0 feet above predicted levels this afternoon and
evening. This will result in tidal levels between 3.3 - 3.8 feet
MLLW later this afternoon and evening along coastal Southern
Louisiana and Southeast Texas.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Precipitation expected to end once the cold front passes, with
cooler than normal temperatures expected though Saturday. A
warming trend with no precipitation is expected Sunday through
Tuesday.

.SPOTTER INFORMATION STATEMENT...
Spotter activation likely needed later this morning through the
evening hours.

GMZ430-432-435-450-452-455-470-472-475-041100-
Sabine Lake-Calcasieu Lake-Vermilion Bay-
Coastal waters from Cameron LA to High Island TX out 20 NM-
Coastal waters from Intracoastal City to Cameron LA out 20 NM-
Coastal waters from Lower Atchafalaya River to Intracoastal City
LA out 20 NM-
Waters from Cameron LA to High Island TX from 20 to 60 NM-
Waters from  Intracoastal City to Cameron LA from 20 to 60 NM-
Waters from Lower Atchafalaya River to Intracoastal City LA from
20 to 60 NM-
515 AM CDT Wed May 3 2017

This Hazardous Weather Outlook is for portions of Gulf of Mexico.

.DAY ONE...Today and Tonight
South to southeasterly winds will continue strengthening today
ahead of the next cold front this evening and early Thursday
morning. Moderate to strong offshore flow is expected behind the
cold front. Small craft advisories are in effect for all marine
zones.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Moderate to strong offshore flow will continue behind the cold
front on Thursday, subsiding on Friday. Small craft advisories
will continue into Thursday.

.SPOTTER INFORMATION STATEMENT...
Spotter activation likely needed later this morning through the
evening hours.

In the hours before

Local storm report, May 3, 8:30 PM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
830 PM CDT WED MAY 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0638 PM     TSTM WND DMG     5 NW BURKEVILLE         31.04N 93.73W
05/03/2017                   NEWTON             TX   LAW ENFORCEMENT

            SHERIFFS DEPT REPORTS TREES DOWN ON 255 REC AND HWY 87.

&&

MOGGED

Local storm report, May 3, 8:35 PM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
835 PM CDT WED MAY 03 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     FLASH FLOOD      4 NW MOSS BLUFF         30.34N 93.25W
05/03/2017                   CALCASIEU          LA   LAW ENFORCEMENT

            COFFEY ROAD IN NORTH MOSS BLUFF IS REPORTED TO BE
            IMPASSABLE.

&&

JRUA

Special weather statement, May 3, 8:40 PM CDT, 59 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
840 PM CDT WED MAY 3 2017

LAZ029-032-033-044-045-040230-
Lafayette LA-St. Landry LA-Avoyelles LA-Evangeline LA-
Upper St. Martin LA-
840 PM CDT WED MAY 3 2017

...SPECIAL WEATHER STATEMENT...

At 840 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Dupont to Ville Platte. Movement was
southeast at 30 mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Lafayette, Opelousas, Carencro, Ville Platte, Simmesport, Krotz
Springs, Leonville, Arnaudville, Melville, Palmetto, Bayou Current,
Morrow, Sunset, Port Barre, Cottonport, Washington, Grand Coteau,
Plaucheville, Goudeau and Prairie Ronde.

A severe thunderstorm watch remains in effect until midnight CDT for
central Louisiana.

LAT...LON 3099 9178 3098 9180 3087 9180 3086 9182
      3084 9180 3081 9181 3078 9177 3071 9173
      3056 9176 3051 9173 3050 9175 3050 9170
      3047 9168 3027 9204 3074 9233 3109 9189
TIME...MOT...LOC 0140Z 316DEG 27KT 3096 9189 3070 9229

06

Special weather statement, May 3, 8:51 PM CDT, 48 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
851 PM CDT WED MAY 3 2017

LAZ030>033-041>045-052-073-074-TXZ201-215-216-261-262-040245-
West Cameron LA-Lafayette LA-St. Landry LA-Evangeline LA-Allen LA-
Calcasieu LA-Acadia LA-Jefferson Davis LA-Vermilion LA-
Upper St. Martin LA-Beauregard LA-East Cameron LA-Jefferson TX-
Hardin TX-Southern Newton TX-Orange TX-Southern Jasper TX-
851 PM CDT WED MAY 3 2017

...SPECIAL WEATHER STATEMENT...

At 850 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Chataignier to 6 miles south of Nome.
Movement was southeast at 35 mph.

Winds in excess of 30 mph will be possible with these storms.

Locations impacted include...
Lafayette, Beaumont, Lake Charles, Port Arthur, Sulphur, Orange,
Nederland, Opelousas, Groves, Crowley, Port Neches, Abbeville,
Lumberton, Vidor, Catahoula, Eunice, Jennings, Scott, Breaux Bridge
and Rayne.

A severe thunderstorm watch remains in effect until midnight CDT for
central and southwestern Louisiana...and southeastern Texas.

LAT...LON 3022 9463 3081 9238 3014 9162 3007 9195
      3003 9197 2971 9297 2980 9334 2976 9335
      2975 9368 2969 9384 2980 9391 2985 9379
      3000 9379 2999 9386 2968 9397 2961 9431
      2990 9434 2992 9444 3011 9445 3011 9456
TIME...MOT...LOC 0150Z 316DEG 29KT 3060 9233 2994 9439

06

Special weather statement, May 3, 8:59 PM CDT, 40 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
859 PM CDT WED MAY 3 2017

LAZ045-053>055-040245-
Lower St. Martin LA-Iberia LA-Upper St. Martin LA-St. Mary LA-
859 PM CDT WED MAY 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR IBERIA...ST. MARY AND SOUTHERN
ST. MARTIN PARISHES UNTIL 945 PM CDT...

At 858 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Cypremort Point to 22 miles south of
Amelia. Movement was northeast at 40 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
New Iberia, Morgan City, Franklin, Patterson, Jeanerette, Berwick,
Bayou Vista, Stephensville, Belle River, Baldwin, Loreauville,
Ellerslie, Patterson Memorial Airport, Glencoe, Lydia, Sorrel,
Amelia, Lake Fausse Pointe, Charenton and Pierre Part.

LAT...LON 2955 9128 2949 9128 2957 9142 2963 9140
      2958 9143 2970 9163 2975 9160 2975 9161
      2976 9163 2987 9191 3008 9184 3013 9161
      3031 9162 3023 9147 3010 9146 3004 9122
      2992 9123 2980 9109 2963 9108
TIME...MOT...LOC 0158Z 216DEG 35KT 2981 9186 2934 9108

06

Special weather statement, May 3, 9:24 PM CDT, 15 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
924 PM CDT WED MAY 3 2017

LAZ045-040315-
Upper St. Martin LA-
924 PM CDT WED MAY 3 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN ST. MARTIN PARISH
UNTIL 1015 PM CDT...

At 924 PM CDT, Doppler radar was tracking a strong thunderstorm near
Henderson, or near Catahoula, moving southeast at 20 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Breaux Bridge, Henderson, Butte La Rose and Lake Pelba.

LAT...LON 3014 9160 3013 9161 3035 9186 3038 9179
      3039 9173 3039 9170 3034 9163 3030 9162
      3022 9161 3017 9161
TIME...MOT...LOC 0224Z 295DEG 16KT 3029 9175

06

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 7:21 PM CDT	Special Weather Statement	LCH	Jasper, Newton, Tyler	54 min
May 3, 7:27 PM CDT	Severe Thunderstorm Warning	LCH	Hardin, Jasper, Tyler	48 min
May 3, 8:13 PM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	32 min
May 3, 8:51 PM CDT	Special Weather Statement	LCH	Jefferson, Orange	54 min
May 3, 11:16 PM CDT	Areal Flood Warning	LCH	Jasper, Newton	18 hr
May 4, 1:25 PM CDT	Wind Advisory	LCH		6 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

Sources

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