Alert archive / Louisiana / Flash Flood Watches in 2017

Flash Flood Watch 6, NWS Lake Charles, LA

June 29, 20179 parishes in Louisiana

NWS Lake Charles, LA issued this flash flood watch at Jun 29, 2017, 8:13 AM CDT for 9 parishes in Louisiana. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Jun 29, 2017, 8:13 AM CDT (13:13 UTC)
Expired: Jun 29, 2017, 7:00 PM CDT
In force: 11 hr
Issued by: NWS Lake Charles, LA
Flood severity: None

Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA

The radar

The Ft Polk radar (KPOE), 83 km from the middle of the area, began a volume at 13:14 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

Shreveport, LA (KBAD), launched 12:00Z, 1.2 hours before the alert went out and 246 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: 154 J/kg
Mixed-layer CIN: -139 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -19 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Jun 29, 8:09 AM CDT, 4 minutes earlier.

Area forecast discussion, Jun 29, 8:09 AM CDT, 4 minutes before

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Hazardous weather outlook, Jun 29, 6:11 AM CDT, 2 hours 2 minutes before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
611 AM CDT Thu Jun 29 2017

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
301115-
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-
611 AM CDT Thu Jun 29 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

Widespread showers and thunderstorms are expected along and south
of the I-10 corridor this morning, expanding northward into parts
of East Central Louisiana this afternoon.Severe thunderstorms are
not expected, but locally heavy rainfall is possible. Average
rainfall totals of 1 to 3 inches are expected along and southeast
of a line from Bunkie Louisiana to Beaumont Texas, with locally
higher amounts of 4 to 5 inches possible. Rainfall is expected to
come to an end this evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Slight and mainly afternoon rain chances are possible Friday and
again next week with a dry weekend in between.

No severe thunderstorms are expected at this time.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation is not expected Today or Tonight.

GMZ430-432-435-450-452-455-470-472-475-301115-
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-
611 AM CDT Thu Jun 29 2017

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

.DAY ONE...Today and Tonight

Scattered to numerous showers and thunderstorms are expected over
the coastal waters Today and Tonight. Widespread severe
thunderstorms are not expected, but isolated waterspouts and
severe marine gusts cannot be ruled out. In addition,
thunderstorms will be capable of very heavy rainfall, reducing
visibility to one nautical mile or less.

Modest south winds are expected to average between 15 to 20 knots
today over the Gulf waters. Small craft should exercise caution.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Storm spotter activation is not expected Today or Tonight.

13

In the hours before

Special weather statement, Jun 29, 6:12 AM CDT, 2 hours 1 minute before

Special Weather Statement
National Weather Service Lake Charles LA
612 AM CDT THU JUN 29 2017

LAZ041-073-TXZ215-216-291145-
West Cameron LA-Calcasieu LA-Orange TX-Jefferson TX-
612 AM CDT THU JUN 29 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CAMERON AND
SOUTHWESTERN CALCASIEU PARISHES...EAST CENTRAL JEFFERSON AND EASTERN
ORANGE COUNTIES UNTIL 645 AM CDT...

At 612 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Orangefield to near Bridge City to near Port
Arthur. Movement was northeast at 25 mph.

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

Locations impacted include...
Port Arthur, Orange, Groves, Bridge City, West Orange and
Orangefield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2976 9397 2992 9392 3012 9391 3027 9366
      3012 9358 2991 9365 2982 9384 2985 9379
      2989 9377 2997 9376 3000 9379 2998 9383
      2999 9385 2993 9386 2986 9393 2982 9387
      2981 9385 2980 9394 2978 9394
TIME...MOT...LOC 1112Z 235DEG 22KT 3009 9384 2997 9381 2986 9388

Tingler

Special weather statement, Jun 29, 6:50 AM CDT, 1 hour 23 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
650 AM CDT THU JUN 29 2017

LAZ041-073-291215-
West Cameron LA-Calcasieu LA-
650 AM CDT THU JUN 29 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CAMERON AND
CALCASIEU PARISHES UNTIL 715 AM CDT...

At 650 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Starks to Edgerly to 7 miles southeast of
Vinton to 7 miles north of Sabine National Wildlife. Movement was
northeast at 35 mph.

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

Locations impacted include...
Lake Charles, Sulphur, Westlake, Vinton, Starks, Moss Bluff, De
Quincy, Dequincy, Carlyss, Lunita, Buhler, Gillis and Edgerly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3007 9366 3015 9366 3024 9371 3029 9371
      3030 9374 3041 9356 3040 9349 3044 9349
      3049 9340 3049 9339 3040 9338 3040 9315
      3038 9312 3028 9310 3005 9329 3005 9333
      3004 9333 2991 9370
TIME...MOT...LOC 1150Z 244DEG 29KT 3031 9361 3022 9353 3011 9350 3000
9360

Tingler

Local storm report, Jun 29, 7:20 AM CDT, 53 minutes before

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Local storm report, Jun 29, 7:45 AM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
745 AM CDT THU JUN 29 2017

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

0655 AM     FLASH FLOOD      2 WSW SULPHUR           30.22N 93.39W
06/29/2017                   CALCASIEU          LA   BROADCAST MEDIA

            BROADCAST MEDIA REPORTS SIGNIFICANT FLOODING IN THE AREA
            OF PETE SEAY RD AND JENNIFER LN.

&&

13

Special weather statement, Jun 29, 7:56 AM CDT, 17 minutes before

Special Weather Statement
National Weather Service Lake Charles LA
756 AM CDT THU JUN 29 2017

LAZ030-031-291330-
Allen LA-Beauregard LA-
756 AM CDT THU JUN 29 2017

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN BEAUREGARD AND WESTERN
ALLEN PARISHES UNTIL 830 AM CDT...

At 755 AM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Longville to near Dry Creek to near
Reeves. Movement was northeast at 20 mph.

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

Locations impacted include...
Kinder, Reeves, Dry Creek, Mittie, Ragley, Grant, Longville, Tulla,
Harmony, Leblanc and Bundick Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3055 9275 3044 9290 3044 9306 3042 9307
      3042 9312 3048 9320 3052 9341 3077 9327
      3082 9292
TIME...MOT...LOC 1255Z 216DEG 15KT 3059 9329 3062 9311 3047 9301

Tingler

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 29, 5:21 AM CDT	Areal Flood Advisory	LCH	Calcasieu	114 min
Jun 29, 5:40 AM CDT	Flash Flood Warning	LCH	Calcasieu	3 hr
Jun 29, 5:43 AM CDT	Areal Flood Advisory	LCH	Calcasieu	2 hr
Jun 29, 6:07 AM CDT	Special Marine Warning	LCH		38 min
Jun 29, 6:50 AM CDT	Special Weather Statement	LCH	Calcasieu	25 min
Jun 29, 7:06 AM CDT	Flash Flood Warning	LCH	Calcasieu	5 hr
Jun 29, 7:56 AM CDT	Special Weather Statement	LCH	Allen	34 min
Jun 29, 9:32 AM CDT	River Flood Warning	LCH	Calcasieu	50 hr
Jun 29, 11:09 AM CDT	Areal Flood Advisory	LCH	Acadia, Evangeline, Iberia, Lafayette, Saint Landry, Saint Martin and 2 more	3 hr
Jun 29, 12:30 PM CDT	Flash Flood Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	4 hr
Jun 29, 1:21 PM CDT	River Flood Warning	LCH	Calcasieu	5 days
Jun 29, 1:21 PM CDT	River Flood Warning	LCH	Lafayette, Vermilion	34 hr
Jun 29, 2:47 PM CDT	Areal Flood Advisory	LCH	Saint Landry	118 min
Jun 29, 3:46 PM CDT	River Flood Warning	LCH	Acadia, Jefferson Davis, Vermilion	68 hr
Jun 29, 6:15 PM CDT	River Flood Warning	LCH	Lafayette, Saint Landry, Saint Martin	50 hr
Jun 29, 6:12 AM CDT	Special Weather Statement	LCH	Orange	33 min
Jun 29, 6:31 AM CDT	Areal Flood Advisory	LCH	Jefferson, Orange	119 min
Jun 29, 7:12 AM CDT	Flash Flood Warning	LCH	Jefferson, Orange	5 hr
Jun 29, 1:28 PM CDT	Flash Flood Warning	LCH	Jefferson, Orange	3 hr

Nearby

Flash Flood Watches in Louisiana, 2017 Flash Flood Watches in Texas, 2017 Every flash flood watch 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.