Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 138, NWS Shreveport, LA

May 26, 2018Angelina County, San Augustine County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 26, 2018, 6:13 PM CDT for Angelina County, San Augustine County, Texas. It was in force for 47 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
May 26, 2018, 6:13 PM CDT (23:13 UTC)
Expired
May 26, 2018, 7:00 PM CDT
In force
47 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Angelina County, TX, San Augustine County, TX

The radar

The Shreveport radar (KSHV), 136 km from the middle of the area, began a volume at 23:14 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, 11.2 hours before the alert went out and 142 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 2018-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2018-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 4:41 PM CDTSpecial Weather StatementSHVSan Augustine49 min
May 26, 5:53 PM CDTSpecial Weather StatementSHVSan Augustine37 min
May 26, 6:05 PM CDTSpecial Weather StatementSHVShelby40 min
May 25, 7:03 PM CDTSpecial Weather StatementSHVClaiborne42 min
May 25, 7:25 PM CDTSpecial Weather StatementSHVUnion50 min
May 25, 7:41 PM CDTSpecial Weather StatementSHVWinn49 min
May 25, 8:03 PM CDTSpecial Weather StatementSHVUnion57 min
May 25, 8:07 PM CDTSpecial Weather StatementSHVOuachita53 min
May 25, 9:00 PM CDTSpecial Weather StatementSHVOuachita45 min
May 26, 1:37 PM CDTSpecial Weather StatementSHVWinn38 min
May 26, 2:06 PM CDTSpecial Weather StatementSHVNatchitoches39 min
May 26, 2:27 PM CDTSpecial Weather StatementSHVWinn48 min
May 26, 3:05 PM CDTSpecial Weather StatementSHVLaSalle40 min
May 26, 3:36 PM CDTSpecial Weather StatementSHVLaSalle39 min
May 26, 4:01 PM CDTSpecial Weather StatementSHVLaSalle44 min
May 26, 5:22 PM CDTSpecial Weather StatementSHVOuachita53 min
May 26, 6:27 PM CDTSpecial Weather StatementSHVUnion48 min
May 26, 6:30 PM CDTSpecial Weather StatementSHVSabine45 min
May 25, 7:00 PM CDTSevere Thunderstorm WarningSHVUnion30 min
May 25, 7:30 PM CDTSpecial Weather StatementSHVUnion30 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018Every severe thunderstorm warning 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.