Alert archive / Louisiana / Special Weather Statements in 2016

Special Weather Statement, NWS Shreveport, LA

June 18, 2016Winn Parish, Louisiana

NWS Shreveport, LA issued this special weather statement at Jun 18, 2016, 10:46 AM CDT for Winn Parish, Louisiana. It was in force for 44 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
Jun 18, 2016, 10:46 AM CDT (15:46 UTC)
Expired
Jun 18, 2016, 11:30 AM CDT
In force
44 min
Issued by
NWS Shreveport, LA

County Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 105 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 103 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, Shreveport, LA at 12:00Z on 2016-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2685 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, Shreveport, LA at 12:00Z on 2016-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
2685 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
906 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 18, 10:33 AM CDT, 13 minutes earlier.

Area forecast discussion, Jun 18, 10:33 AM CDT, 13 minutes before
Area Forecast Discussion
National Weather Service Shreveport LA
1033 AM CDT SAT JUN 18 2016

.DISCUSSION...
Showers and thunderstorms along a surface boundary continuing to
generate convection across portions of north Louisiana this
morning. For this update, went ahead and increased pops based on
high-res models. Otherwise, heat index values currently above 100
degrees across portions of deep east Texas and Northwest
Louisiana. Heat advisory for this area remains in effect through 7
PM. /05/

&&

.PRELIMINARY POINT TEMPS/POPS...
SHV  94  74  91  73 /  30  20  30  20
MLU  93  73  89  72 /  30  10  40  20
DEQ  92  71  90  71 /  20  10  20  20
TXK  93  72  90  72 /  20  10  20  20
ELD  93  71  89  71 /  30  10  20  20
TYR  94  74  91  73 /  20  20  20  20
GGG  94  74  91  72 /  20  20  20  20
LFK  94  74  91  72 /  30  20  40  20

&&

.SHV Watches/Warnings/Advisories...
AR...None.
LA...Heat Advisory until 7 PM CDT this evening for LAZ001>003-010>012-
     017>020-022.

OK...None.
TX...Heat Advisory until 7 PM CDT this evening for TXZ108>112-124>126-
     136>138-149>153-165>167.

&&

05
Hazardous weather outlook, Jun 18, 6:00 AM CDT, 4 hours 46 minutes before
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In the hours before

Special weather statement, Jun 18, 9:25 AM CDT, 1 hour 21 minutes before
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Special weather statement, Jun 18, 10:46 AM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1046 AM CDT SAT JUN 18 2016

LAZ013-019-181630-
JACKSON LA-WINN LA-
1046 AM CDT SAT JUN 18 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JACKSON AND
NORTHWESTERN WINN PARISHES UNTIL 1130 AM CDT...

AT 1046 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
NEAR JONESBORO...MOVING SOUTH AT 15 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
WINNFIELD...JONESBORO...HODGE...NORTH HODGE...DODSON...EAST HODGE...
CALVIN...SIKES...HUDSON AND JOYCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3185 9249 3194 9288 3195 9287 3195 9288
      3199 9289 3215 9283 3215 9282 3216 9282
      3218 9280 3221 9280 3223 9277 3232 9277
      3222 9248
TIME...MOT...LOC 1546Z 010DEG 14KT 3219 9269

12

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 2:15 PM CDTSpecial Weather StatementSHVShelby45 min
Jun 18, 2:48 PM CDTSpecial Weather StatementSHVGregg, Harrison, Marion, Nacogdoches, Panola, Rusk and 1 more57 min
Jun 18, 3:13 PM CDTSevere Thunderstorm WarningSHVAngelina, Nacogdoches, Sabine, San Augustine, Shelby62 min
Jun 18, 4:00 PM CDTSevere Thunderstorm WarningSHVCass, Harrison, Marion45 min
Jun 18, 6:15 PM CDTSpecial Weather StatementSHVFranklin15 min
Jun 18, 9:25 AM CDTSpecial Weather StatementSHVCaldwell50 min
Jun 18, 11:12 AM CDTSevere Thunderstorm WarningSHVBienville, Jackson, Natchitoches, Winn48 min
Jun 18, 11:41 AM CDTSpecial Weather StatementSHVBienville49 min
Jun 18, 12:46 PM CDTSevere Thunderstorm WarningSHVBienville, Bossier, Caddo, De Soto, Red River, Webster59 min
Jun 18, 12:55 PM CDTSevere Thunderstorm WarningSHVNatchitoches, Sabine37 min
Jun 18, 1:42 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo, De Soto63 min
Jun 18, 2:34 PM CDTAreal Flood AdvisorySHVBossier, Caddo3 hr
Jun 18, 5:09 PM CDTSpecial Weather StatementSHVBossier51 min
Jun 17, 7:36 PM CDTSevere Thunderstorm WarningSHVMcCurtain39 min
Jun 17, 8:20 PM CDTSpecial Weather StatementSHVMcCurtain40 min
Jun 18, 5:07 PM CDTSpecial Weather StatementSHVMcCurtain38 min
Jun 18, 5:34 PM CDTSpecial Weather StatementSHVMcCurtain41 min

Nearby

Special Weather Statements in Louisiana, 2016Every special weather statement in 2016

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.