Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 20, NWS Shreveport, LA

January 23, 1997Bienville Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 23, 1997, 8:20 PM CST for Bienville Parish, Louisiana. It was in force for 40 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jan 23, 1997, 8:20 PM CST (02:20 UTC)
Expired: Jan 23, 1997, 9:00 PM CST
In force: 40 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Bienville Parish, LA

The radar

The Shreveport radar (KSHV), 75 km from the middle of the area, began a volume at 02:21 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.

What was reported inside it

Time	Report	Where	Remark
Jan 23, 8:45 PM CST	Thunderstorm Wind 60	Bienville, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 23, 7:15 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.3 hours before the alert went out and 67 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 496 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 470 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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.

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 Jan 23, 7:45 PM CST, 35 minutes earlier.

Area forecast discussion, Jan 23, 7:45 PM CST, 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
745 PM CST THU JAN 23 1997

SVR WX RUNNING RAMPANT ACRS AREA THIS EVE. THOUGH STORMS ACRS MOST OF
REGION...WORST ACTIVITY APPEARS CONCENTRATED NR WARM FNT INDICATED STILL
JUST SOUTH OF A TYR-SHV-MLU LINE WHERE WINDS SHFT FM EAST TO SOUTH AND
DEWPOINTS JUMP INTO LWR/MID 60S. SHV SOUNDING INDICATES HELICITIES OF
3-400 ALG FNT DUE IN PART TO BNDRY LYR EAST FLOW. ALSO...K AND TT
INDECES STILL INCREASING TIL FROPA. ONLY GOOD NEWS IS THAT TOR THREAT
SHOULD DIMINISH AS WARM FNT ACCELERATES NORTH. HOWEVER...SVR THREAT
MAY NEED TO BE EXTENDED PAST MIDNIGHT FOR AR/LA PORTIONS. LEWP HOLDING
TOGETHER IN NW LA AND EXPECT MORE SVR WX FM THAT. 3 HOUR FFG VALUES
GENERALLY 2-3 INCHES FM THIS MRNG AND AS 1-2 INCHES HAVE FALLEN IN SVRL
AREAS...REPEAT ACTIVITY LIKELY RESULT IN SOME MINOR FLDG.

VII

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 23, 6:13 PM CST	Severe Thunderstorm Warning	SHV	Rusk	47 min
Jan 23, 6:29 PM CST	Severe Thunderstorm Warning	SHV	Nacogdoches	31 min
Jan 23, 6:55 PM CST	Severe Thunderstorm Warning	SHV	Nacogdoches, Rusk	35 min
Jan 23, 6:38 PM CST	Tornado Warning	SHV	De Soto, Sabine	37 min
Jan 23, 7:14 PM CST	Tornado Warning	SHV	De Soto, Red River	46 min
Jan 23, 7:28 PM CST	Severe Thunderstorm Warning	SHV	De Soto	32 min
Jan 23, 7:57 PM CST	Severe Thunderstorm Warning	SHV	De Soto	48 min
Jan 23, 8:09 PM CST	Severe Thunderstorm Warning	SHV	Red River	51 min
Jan 23, 9:00 PM CST	Severe Thunderstorm Warning	SHV	Jackson	60 min
Jan 23, 9:30 PM CST	Severe Thunderstorm Warning	SHV	Ouachita	30 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.