Alert archive / Louisiana / Areal Flood Warnings in 2017

Areal Flood Warning 9, NWS Lake Charles, LA

May 3, 201712 parishes in Louisiana; Jasper County, Newton County, Texas

NWS Lake Charles, LA issued this areal flood warning at May 3, 2017, 11:16 PM CDT for 12 parishes in Louisiana; Jasper County, Newton County, Texas. It was in force for 18 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 3, 2017, 11:16 PM CDT (04:16 UTC)
Expired
May 4, 2017, 5:15 PM CDT
In force
18 hr
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Flood severity
None

Counties Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Jasper County, TX, Newton County, TX

The radar

The Lake Charles radar (KLCH), 64 km from the middle of the area, began a volume at 04:19 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 nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.3 hours before the alert went out and 62 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-pSkew-T log-p diagram, Lake Charles Mun, LA at 00:00Z on 2017-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1128 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2017-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 459 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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

What forecasters said that day

The local office's own words before this areal flood 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 areal flood warning went out at May 3, 9:46 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, May 3, 9:46 PM CDT, 1 hour 30 minutes before
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Hazardous weather outlook, May 3, 5:15 AM CDT, 18 hours 1 minute 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

Special weather statement, May 3, 8:51 PM CDT, 2 hours 25 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, 2 hours 17 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, 1 hour 52 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
Local storm report, May 3, 10:51 PM CDT, 25 minutes before
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Local storm report, May 3, 10:55 PM CDT, 21 minutes before
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Local storm report, May 3, 10:56 PM CDT, 20 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 7:06 PM CDTSevere Thunderstorm WarningLCHAvoyelles, Rapides, Vernon32 min
May 3, 7:16 PM CDTSevere Thunderstorm WarningLCHSaint Martin, St. Mary18 min
May 3, 7:26 PM CDTSevere Thunderstorm WarningLCHAllen, Beauregard37 min
May 3, 7:32 PM CDTSevere Thunderstorm WarningLCHAllen, Evangeline, Rapides30 min
May 3, 7:57 PM CDTSpecial Weather StatementLCHAcadia, Evangeline48 min
May 3, 8:09 PM CDTSpecial Weather StatementLCHJefferson Davis66 min
May 3, 8:13 PM CDTSevere Thunderstorm WarningLCHBeauregard32 min
May 3, 8:35 PM CDTRiver Flood WarningLCHLafayette, Saint Landry, Saint Martin63 hr
May 3, 8:40 PM CDTSpecial Weather StatementLCHSaint Landry50 min
May 3, 8:49 PM CDTSpecial Marine WarningLCH86 min
May 3, 8:51 PM CDTSpecial Weather StatementLCHAcadia, Allen, Calcasieu, Cameron, Evangeline, Jefferson Davis and 1 more54 min
May 3, 8:59 PM CDTSpecial Weather StatementLCHSaint Martin, St. Mary46 min
May 3, 9:17 PM CDTRiver Flood WarningLCHRapides8 days
May 3, 9:17 PM CDTRiver Flood WarningLCHAllen5 days
May 3, 9:17 PM CDTRiver Flood WarningLCHAllen, Jefferson Davis6 days
May 3, 9:17 PM CDTRiver Flood WarningLCHBeauregard4 days
May 3, 9:17 PM CDTRiver Flood WarningLCHAllen5 days
May 3, 9:24 PM CDTSpecial Weather StatementLCHSaint Martin51 min
May 3, 9:34 PM CDTSpecial Marine WarningLCH116 min
May 3, 11:36 PM CDTSpecial Marine WarningLCH114 min
May 4, 1:30 AM CDTSpecial Marine WarningLCH2 hr
May 4, 11:26 AM CDTRiver Flood WarningLCHSaint Martin, St. Mary47 days
May 4, 1:25 PM CDTWind AdvisoryLCHAvoyelles, Cameron, Evangeline, Lafayette, Rapides, Saint Landry and 1 more6 hr
May 4, 2:12 PM CDTRiver Flood WarningLCHVernon3 days
May 3, 7:21 PM CDTSpecial Weather StatementLCHJasper, Newton, Tyler54 min
May 3, 7:27 PM CDTSevere Thunderstorm WarningLCHHardin, Jasper, Tyler48 min
May 3, 9:39 PM CDTSevere Thunderstorm WarningLCHJefferson66 min

Nearby

Areal Flood Warnings in Louisiana, 2017Areal Flood Warnings in Texas, 2017Every areal flood 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.