Alert archive / Louisiana / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 199, NWS Shreveport, LA

June 17, 2015Claiborne Parish, Lincoln Parish, Union Parish, Louisiana; Union County, Arkansas

NWS Shreveport, LA issued this severe thunderstorm warning at Jun 17, 2015, 3:38 PM CDT for Claiborne Parish, Lincoln Parish, Union Parish, Louisiana; Union County, Arkansas. It was in force for 67 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 17, 2015, 3:38 PM CDT (20:38 UTC)
Expired: Jun 17, 2015, 4:45 PM CDT
In force: 67 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Union County, AR, Claiborne Parish, LA, Lincoln Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 120 km from the middle of the area, began a volume at 20:41 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, 8.6 hours before the alert went out and 110 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: 343 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 745 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 108 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 3:28 PM CDT, 10 minutes earlier.

Area forecast discussion, Jun 17, 3:28 PM CDT, 10 minutes before

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Hazardous weather outlook, Jun 17, 11:46 AM CDT, 3 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1146 AM CDT WED JUN 17 2015

OKZ077-TXZ096-108>111-124-125-136-137-149-150-181115-
MCCURTAIN-RED RIVER-FRANKLIN-TITUS-CAMP-MORRIS-WOOD-UPSHUR-SMITH-
GREGG-CHEROKEE-RUSK-
1146 AM CDT WED JUN 17 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
OKLAHOMA AND NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

VERY HEAVY RAINFALL ASSOCIATED WITH THE REMNANTS OF TROPICAL
DEPRESSION BILL REMAIN POSSIBLE THROUGH TONIGHT ACROSS PARTS OF
EASTERN TEXAS...WHICH MAY LEAD TO FLASH FLOODING. ADDITIONALLY...A
COUPLE OF WEAK TORNADOES MAY BE POSSIBLE THIS AFTERNOON...AS WIND
SHEAR AND INSTABILITY VALUES ASSOCIATED WITH THE STORM APPEAR
FAVORABLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

THE POTENTIAL FOR HEAVY RAINFALL AND AN ISOLATED SEVERE STORM REMAIN
POSSIBLE THROUGH THURSDAY WITH THE REMNANTS OF TROPICAL DEPRESSION
BILL. THE RAINFALL MAY RESULT IN FLASH FLOODING IN A FEW LOCATIONS.
ADDITIONAL RIVER FLOODING ON THE NECHES...SABINE... ANGELINA...AND
SULPHUR RIVERS OF EAST TEXAS IS ALSO POSSIBLE BY THURSDAY.

A NEW RISE WILL DEVELOP ON THE RED RIVER IN NORTH TEXAS AND SOUTH
OKLAHOMA AND SPREAD DOWNSTREAM INTO LOUISIANA THROUGH THE REMAINDER
OF THIS JUNE.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS COULD BE REQUIRED DURING THIS
AFTERNOON AND EVENING IN THE SPIRAL THUNDERSTORM BANDS ASSOCIATED
WITH TROPICAL DEPRESSION BILL.

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-TXZ097-112-
126-138-151>153-165>167-181115-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-DE SOTO-
RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE-NATCHITOCHES-WINN-
GRANT-CALDWELL-LA SALLE-BOWIE-CASS-MARION-HARRISON-PANOLA-
NACOGDOCHES-SHELBY-ANGELINA-SAN AUGUSTINE-
1146 AM CDT WED JUN 17 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...EAST TEXAS AND NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS
AFTERNOON.  HOWEVER...NO HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY...

SCATTERED THUNDERSTORMS WILL CONTINUE THROUGH FRIDAY...MAINLY
DURING THE AFTERNOON AND EVENING HOURS. NO HAZARDOUS WEATHER IS
EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGEMENT PERSONNEL...AMATEUR RADIO
OPERATORS...AND STORM SPOTTERS WILL NOT BE NEEDED THROUGH TONIGHT.

VIII.

In the hours before

Local storm report, Jun 17, 3:08 PM CDT, 30 minutes before

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Special weather statement, Jun 17, 3:13 PM CDT, 25 minutes before

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Special weather statement, Jun 17, 3:17 PM CDT, 21 minutes before

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Local storm report, Jun 17, 3:23 PM CDT, 15 minutes before

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Local storm report, Jun 17, 3:26 PM CDT, 12 minutes before

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Local storm report, Jun 17, 3:28 PM CDT, 10 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 4:13 AM CDT	Lake Wind Advisory	SHV	Angelina, Camp, Cherokee, Franklin, Gregg, Morris and 7 more	15 hr
Jun 17, 9:20 AM CDT	Flash Flood Warning	SHV	Angelina, Cherokee, Nacogdoches	4 hr
Jun 17, 10:01 AM CDT	Flash Flood Warning	SHV	Rusk	4 hr
Jun 17, 10:29 AM CDT	Special Weather Statement	SHV	Camp, Gregg, Panola, Upshur	46 min
Jun 17, 10:53 AM CDT	River Flood Warning	SHV	Smith, Wood	9 days
Jun 17, 12:23 PM CDT	Special Weather Statement	SHV	Bowie	52 min
Jun 17, 12:24 PM CDT	Special Weather Statement	SHV	Bowie	51 min
Jun 17, 12:50 PM CDT	Special Weather Statement	SHV	Bowie, Cass, Marion	40 min
Jun 17, 1:21 PM CDT	Special Weather Statement	SHV	Bowie	24 min
Jun 17, 1:59 PM CDT	Special Weather Statement	SHV	Bowie	46 min
Jun 17, 2:40 PM CDT	Flash Flood Warning	SHV	Angelina, Nacogdoches	4 hr
Jun 17, 11:23 AM CDT	Special Weather Statement	SHV	Sabine	37 min
Jun 17, 1:06 PM CDT	Special Weather Statement	SHV	Caddo	39 min
Jun 17, 1:15 PM CDT	Special Weather Statement	SHV	Bossier	45 min
Jun 17, 1:19 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	26 min
Jun 17, 1:37 PM CDT	Areal Flood Advisory	SHV	Bienville, Bossier, Caddo	3 hr
Jun 17, 1:38 PM CDT	Special Weather Statement	SHV	Natchitoches, Red River	37 min
Jun 17, 1:54 PM CDT	Special Weather Statement	SHV	Bienville, Bossier, Red River, Webster	51 min
Jun 17, 2:16 PM CDT	Special Weather Statement	SHV	Bienville, Bossier, Webster	44 min
Jun 17, 2:22 PM CDT	Special Weather Statement	SHV	Bienville	38 min
Jun 17, 2:22 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, Webster	38 min
Jun 17, 2:48 PM CDT	Special Weather Statement	SHV	Claiborne	87 min
Jun 17, 3:13 PM CDT	Special Weather Statement	SHV	Claiborne, Jackson, Lincoln, Ouachita, Union	62 min
Jun 17, 3:17 PM CDT	Special Weather Statement	SHV	Grant, LaSalle, Natchitoches, Red River, Sabine, Winn	88 min
Jun 17, 6:05 PM CDT	Special Weather Statement	SHV	Union	55 min
Jun 17, 1:50 PM CDT	Special Weather Statement	SHV	Miller	55 min
Jun 17, 2:03 PM CDT	Special Weather Statement	SHV	Miller	42 min
Jun 17, 2:15 PM CDT	Severe Thunderstorm Warning	SHV	Hempstead, Lafayette, Little River, Miller, Nevada	45 min
Jun 17, 3:02 PM CDT	Severe Thunderstorm Warning	SHV	Columbia, Hempstead, Lafayette, Nevada	43 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2015 Severe Thunderstorm Warnings in Arkansas, 2015 Every severe thunderstorm warning in 2015

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.