Alert archive / Texas / Special Weather Statements in 2018

Special Weather Statement, NWS Shreveport, LA

September 7, 2018Franklin County, Texas

NWS Shreveport, LA issued this special weather statement at Sep 7, 2018, 4:39 PM CDT for Franklin County, Texas. It was in force for 51 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
Sep 7, 2018, 4:39 PM CDT (21:39 UTC)
Expired
Sep 7, 2018, 5:30 PM CDT
In force
51 min
Issued by
NWS Shreveport, LA

County Franklin County, TX

The radar

The Shreveport radar (KSHV), 142 km from the middle of the area, began a volume at 21:38 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

Fort Worth, TX (KFWD), launched 12:00Z, 9.7 hours before the alert went out and 200 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, Fort Worth, TX at 12:00Z on 2018-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 683 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, Fort Worth, TX at 12:00Z on 2018-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
683 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
841 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 9:51 AM CDTAreal Flood AdvisorySHVHarrison3 hr
Sep 7, 5:20 PM CDTSpecial Weather StatementSHVRusk55 min
Sep 7, 6:51 PM CDTSpecial Weather StatementSHVRed River54 min
Sep 7, 3:11 PM CDTSpecial Weather StatementSHVWebster49 min
Sep 7, 4:26 PM CDTSpecial Weather StatementSHVCaddo64 min
Sep 7, 4:33 PM CDTSpecial Weather StatementSHVCaddo57 min
Sep 7, 4:54 PM CDTSpecial Weather StatementSHVLincoln66 min
Sep 7, 5:26 PM CDTSpecial Weather StatementSHVBienville64 min
Sep 7, 5:34 PM CDTSpecial Weather StatementSHVLincoln56 min
Sep 7, 5:59 PM CDTSpecial Weather StatementSHVClaiborne61 min
Sep 7, 6:04 PM CDTSevere Thunderstorm WarningSHVClaiborne41 min
Sep 7, 6:29 PM CDTSpecial Weather StatementSHVUnion61 min

Nearby

Special Weather Statements in Texas, 2018Every special weather statement in 2018

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.