Alert archive / Louisiana / Severe Thunderstorm Watches in 1997

Severe Thunderstorm Watch 38

January 27, 19974 states

The Storm Prediction Center issued this severe thunderstorm watch at Jan 27, 1997, 2:45 PM CST for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jan 27, 1997, 2:45 PM CST (20:45 UTC)
Expired
Jan 27, 1997, 8:00 PM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 60 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Drew County, AR, Hempstead County, AR, Lafayette County, AR, Lincoln County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Issaquena County, MS, Warren County, MS, Angelina County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Hopkins County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 37 km from the middle of the area, began a volume at 20:50 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.

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 27, 4:04 PM CSTSevere Thunderstorm WarningJANMadison26 min
Jan 27, 4:16 PM CSTSevere Thunderstorm WarningSHVMiller29 min
Jan 27, 4:17 PM CSTSevere Thunderstorm WarningJANEast Carroll28 min
Jan 27, 4:34 PM CSTSevere Thunderstorm WarningSHVSan Augustine26 min
Jan 27, 4:35 PM CSTSevere Thunderstorm WarningJANMorehouse40 min
Jan 27, 5:07 PM CSTSevere Thunderstorm WarningSHVLafayette38 min
Jan 27, 5:09 PM CSTSevere Thunderstorm WarningJANMorehouse36 min
Jan 27, 5:16 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo44 min
Jan 27, 5:25 PM CSTSevere Thunderstorm WarningSHVColumbia65 min
Jan 27, 5:30 PM CSTSevere Thunderstorm WarningLZKOuachita35 min
Jan 27, 5:38 PM CSTSevere Thunderstorm WarningJANChicot52 min
Jan 27, 5:39 PM CSTSevere Thunderstorm WarningSHVSabine36 min
Jan 27, 5:45 PM CSTSevere Thunderstorm WarningSHVAngelina45 min
Jan 27, 5:50 PM CSTSevere Thunderstorm WarningSHVShelby40 min
Jan 27, 6:42 PM CSTSevere Thunderstorm WarningJANMorehouse48 min
Jan 27, 6:53 PM CSTSevere Thunderstorm WarningJANChicot37 min
Jan 27, 6:55 PM CSTSevere Thunderstorm WarningSHVOuachita50 min
Jan 27, 7:29 PM CSTSevere Thunderstorm WarningJANMorehouse46 min

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 8.8 hours before the alert went out and 32 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 1997-01-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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 1997-01-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.19395878Sfc1 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
23 J/kg
Mixed-layer CIN
-259 J/kg
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
366 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 27, 5:15 PM CSTSevere Thunderstorm WatchSPCArkansas, Chicot, Desha, Lee, Monroe, Phillips7 hr
Jan 27, 1:45 PM CSTSevere Thunderstorm WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula and 14 more5 hr
Jan 27, 4:00 PM CSTSevere Thunderstorm WatchSPCAngelina, Aransas, Austin, Brazoria, Brazos, Burleson and 28 more6 hr

Nearby

Severe Thunderstorm Watches in Louisiana, 1997Severe Thunderstorm Watches in Texas, 1997Severe Thunderstorm Watches in Arkansas, 1997Every severe thunderstorm watch in 1997

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.