Alert archive / Louisiana / Flash Flood Warnings in 2019

Flash Flood Warning 31, NWS Lake Charles, LA

May 10, 2019Calcasieu Parish, Louisiana

NWS Lake Charles, LA issued this flash flood warning at May 10, 2019, 12:54 AM CDT for Calcasieu Parish, Louisiana. It was in force for 2 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 10, 2019, 12:54 AM CDT (05:54 UTC)
Expired: May 10, 2019, 3:00 AM CDT
In force: 2 hr
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Flood severity: None

County Calcasieu Parish, LA

The radar

The Lake Charles radar (KLCH), 13 km from the middle of the area, began a volume at 05:55 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.

What was reported inside it

Time	Report	Where	Remark
May 10, 1:15 AM CDT	FLASH FLOOD	1 N Carlyss, LA
May 10, 1:20 AM CDT	FLASH FLOOD	1 Nw Sulphur, LA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 21 minutes after it went out.

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 nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 5.9 hours before the alert went out and 14 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: 409 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 819 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.8

Open this sounding in Storm Lab

The text

As transmitted.

751 
WGUS54 KLCH 100554
FFWLCH
LAC019-100800-
/O.NEW.KLCH.FF.W.0031.190510T0554Z-190510T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Lake Charles LA
1254 AM CDT Fri May 10 2019

The National Weather Service in Lake Charles has issued a

* Flash Flood Warning for...
  South central Calcasieu Parish in southwestern Louisiana...

* Until 300 AM CDT.

* At 1253 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Two to four inches of rain have 
  fallen, with rainfall rates of up to 4 inches per hour. Flash 
  flooding is occurring or expected to begin shortly.

* Some locations that will experience flooding include...
  Lake Charles, Sulphur, Westlake and Carlyss. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

&&

LAT...LON 3029 9316 3016 9311 3008 9348 3031 9349

$$

24

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at May 9, 11:41 PM CDT, 1 hour 13 minutes earlier.

Area forecast discussion, May 9, 11:41 PM CDT, 1 hour 13 minutes before

Area Forecast Discussion
National Weather Service Lake Charles LA
1141 PM CDT Thu May 9 2019

.DISCUSSION...
10/06Z TAF Issuance.

&&

.AVIATION...
Sctd storms near the Acadiana terminals are beginning to weaken
and move NE, while a band of strong to svr storms over SE TX is
beginning to organize and should begin accelerating east over the
next hour or so (which seems to correspond well to recent HRRR
runs). In between some sctd storms have developed near the lower
Sabine River between BPT and LCH. Given the consistency in recent
HRRR runs and general agreement with current convective scenario,
trended toward its solution for overnight into Friday. Adjusted
TEMPO groups to reflect general timing of convective complex and
it moves east acrs the area overnight, between 06-09Z at BPT,
07-11Z at LCH and 09-13Z at LFT/ARA. The line could bring strong
wind gusts to BPT/LCH. Once the complex moves through, HRRR
guidance suggests minimal activity during the day Friday, although
am not inclined to rule out convection entirely as atmosphere
will remain moist and unstable so retained VC mention at all
sites. Cigs will initially be a mix of VFR/MVFR with lower
cigs/vsbys expected with convective band overnight. Winds will be
generally easterly, bcmg vrbl around SHRA/TSRA.

24

&&

.PRELIMINARY POINT TEMPS/POPS...
AEX  68  77  67  78 /  80  90  70  90
LCH  71  79  72  81 /  80  90  70  90
LFT  72  82  72  82 /  60  90  70  80
BPT  71  79  71  80 /  90  90  80  90

&&

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

TX...Flash Flood Watch through Saturday evening for TXZ180-201-215-
     216-259>262.

GM...Small Craft Exercise Caution until 7 AM CDT Friday for GMZ430-
     432-435-450-452-455-470-472-475.

&&

AVIATION...24

Hazardous weather outlook, May 9, 7:22 PM CDT, 5 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service Lake Charles LA
722 PM CDT Thu May 9 2019

LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-
110030-
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-
722 PM CDT Thu May 9 2019

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

.DAY ONE...Tonight

Slight to Moderate Risk of excessive rainfall. A Flash Flood Watch
is in effect for all counties and parishes and this will now
include Iberia, St. Mary, and lower St. Martin Parishes in south
central Louisiana.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Through Saturday night, Slight to Moderate Risk of excessive rainfall.
A Flash Flood Watch is in effect for all of the area except for
Iberia, St. Mary, and lower St. Martin Parishes. The watch may
have to be extended into these parishes. Marginal Risk of Severe
Storms for potential damaging straight line winds and even a
quick spin up brief lived tornado.

Drier and more stable air is expected to move in during Sunday.

.SPOTTER INFORMATION STATEMENT...

GMZ430-432-435-450-452-455-470-472-475-110030-
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-
722 PM CDT Thu May 9 2019

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

.DAY ONE...Tonight

A few storms may move into the coastal waters with locally higher
winds and seas along with frequent cloud to water lightning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Periods of showers and storms will be possible through Saturday
night. These storms will produce locally higher winds and seas,
frequent cloud to water lightning, along with greatly reduced
visibilities due to heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

In the hours before

Local storm report, May 10, 12:14 AM CDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1214 AM CDT FRI MAY 10 2019

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

1209 AM     HAIL             2 SW SULPHUR            30.20N 93.38W
05/10/2019  E2.50 INCH       CALCASIEU          LA   PUBLIC

            FRIEND OF NWS EMPLOYEE RELAYED REPORT OF HAIL TO TENNIS
            BALL SIZED FALLING SW OF SULPHUR.

&&

SWARTHEN

Local storm report, May 10, 12:24 AM CDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1224 AM CDT FRI MAY 10 2019

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

1220 AM     HAIL             2 W SULPHUR             30.23N 93.39W
05/10/2019  E1.75 INCH       CALCASIEU          LA   NWS EMPLOYEE

            NWS EMPLOYEE RELAYING REPORT OF HAIL RANGING FROM NICKEL
            TO GOLF BALL SIZE WEST OF SULPHUR.

&&

SWARTHEN

Local storm report, May 10, 12:29 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1229 AM CDT FRI MAY 10 2019

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

1154 PM     HAIL             2 S SULPHUR             30.20N 93.35W
05/09/2019  E2.50 INCH       CALCASIEU          LA   FIRE DEPT/RESCUE

            CARLYSS FIRE DEPT. ON MOSSWOOD DRIVE REPORTED HAIL
            RANGING FROM PEA SIZE TO GOLF BALL SIZE FOR SEVERAL
            MINUTES. UPDATE 10 MINUTES LATER... MAX HAIL SIZE
            INCREASED TO TENNIS BALL SIZE. FIRE DEPT. REPORTED HAIL
            PUNCHED THROUGH FIBERGLASS ROOF AT STATION AND REPORTEDLY
            A HOUSE IN CARLYSS HAD ROOF COLLAPSE DUE TO HAIL, BUT
            THEYRE UNABLE TO DISPATCH DUE TO THE ONGOING HAIL.

&&

SWARTHEN

Local storm report, May 10, 12:47 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1247 AM CDT FRI MAY 10 2019

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

1247 AM     HAIL             1 WSW MOSS BLUFF        30.30N 93.22W
05/10/2019  E1.00 INCH       CALCASIEU          LA   NWS EMPLOYEE

            NWS EMPLOYEE REPORTING QUARTER SIZE HAIL FALLING AT THE
            ROUSES MARKET IN MOSS BLUFF.

&&

SWARTHEN

Local storm report, May 10, 12:52 AM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1252 AM CDT FRI MAY 10 2019

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

1248 AM     HAIL             4 W MOSS BLUFF          30.31N 93.26W
05/10/2019  E1.75 INCH       CALCASIEU          LA   PUBLIC

            REPORT OF GOLF BALL SIZED HAIL NEAR SAM HOUSTON JONES
            STATE PARK.

&&

SWARTHEN

Local storm report, May 10, 12:54 AM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
1254 AM CDT FRI MAY 10 2019

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

1253 AM     HAIL             1 N MOSS BLUFF          30.32N 93.20W
05/10/2019  E1.75 INCH       CALCASIEU          LA   NWS EMPLOYEE

            NWS EMPLOYEE REPORTING GOLF BALL SIZE HAIL AT HIS
            RESIDENCE.

&&

SWARTHEN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 7:07 PM CDT	Flash Flood Warning	LCH	Acadia, Jefferson Davis, Saint Landry	3 hr
May 9, 7:09 PM CDT	Flash Flood Warning	LCH	Lafayette, Saint Martin	3 hr
May 9, 7:15 PM CDT	Special Weather Statement	LCH	Saint Martin	15 min
May 9, 7:44 PM CDT	Special Weather Statement	LCH	Saint Martin	16 min
May 9, 8:09 PM CDT	Special Weather Statement	LCH	Saint Martin	36 min
May 9, 9:28 PM CDT	Flash Flood Warning	LCH	Iberia, Saint Martin	3 hr
May 9, 9:54 PM CDT	Special Weather Statement	LCH	Saint Landry	51 min
May 9, 9:57 PM CDT	Areal Flood Advisory	LCH	Lafayette	63 min
May 9, 10:02 PM CDT	Areal Flood Warning	LCH	Acadia, Jefferson Davis, Saint Landry	118 min
May 9, 10:16 PM CDT	Flash Flood Warning	LCH	Lafayette, Saint Martin	3 hr
May 9, 10:24 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	51 min
May 9, 10:56 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	64 min
May 9, 10:59 PM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu	32 min
May 9, 11:57 PM CDT	Areal Flood Warning	LCH	Acadia, Jefferson Davis, Saint Landry	3 hr
May 10, 12:02 AM CDT	Areal Flood Warning	LCH	Iberia, Saint Martin	118 min
May 10, 12:02 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu	58 min
May 10, 12:23 AM CDT	Special Marine Warning	LCH		67 min
May 10, 12:47 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis	58 min
May 10, 12:49 AM CDT	Special Marine Warning	LCH		11 min
May 10, 12:54 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	66 min
May 10, 12:56 AM CDT	Flash Flood Warning	LCH	Beauregard	2 hr
May 10, 1:13 AM CDT	Areal Flood Warning	LCH	Lafayette, Saint Martin	2 hr
May 10, 1:18 AM CDT	Special Marine Warning	LCH		57 min
May 10, 1:21 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard	39 min
May 10, 1:41 AM CDT	Special Marine Warning	LCH		64 min
May 10, 2:01 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis	59 min
May 10, 2:02 AM CDT	Special Weather Statement	LCH	Allen	43 min
May 10, 2:17 AM CDT	Special Marine Warning	LCH		58 min
May 10, 2:27 AM CDT	Flash Flood Warning	LCH	Acadia, Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis	3 hr
May 10, 2:27 AM CDT	River Flood Warning	LCH	Lafayette, Saint Landry, Saint Martin	5 days
May 10, 2:27 AM CDT	River Flood Warning	LCH	Lafayette, Vermilion	16 days
May 10, 2:43 AM CDT	Flash Flood Warning	LCH	Beauregard, Calcasieu	3 hr
May 10, 2:56 AM CDT	Special Weather Statement	LCH	Jefferson Davis	49 min
May 10, 3:25 AM CDT	Special Weather Statement	LCH	Evangeline	50 min
May 10, 4:00 AM CDT	Small Craft Advisory	LCH		11 hr
May 10, 4:53 AM CDT	Special Marine Warning	LCH		2 hr
May 10, 6:15 AM CDT	Flash Flood Warning	LCH	Acadia, Evangeline, Iberia, Lafayette, Saint Landry, Saint Martin and 1 more	2 hr
May 10, 7:02 AM CDT	Special Marine Warning	LCH		43 min
May 10, 7:04 AM CDT	Special Marine Warning	LCH		41 min
May 10, 8:23 AM CDT	Special Weather Statement	LCH	St. Mary	37 min
May 10, 11:47 AM CDT	River Flood Warning	LCH	Iberia, Saint Martin, St. Mary	25 days

Nearby

Flash Flood Warnings in Louisiana, 2019 Every flash flood warning in 2019

Sources

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