Alert archive / Louisiana / Tornado Warnings in 2000

Tornado Warning 41, NWS Shreveport, LA

April 23, 2000Grant Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 23, 2000, 8:37 PM CDT for Grant Parish, Winn Parish, Louisiana. It was in force for 53 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: Apr 23, 2000, 8:37 PM CDT (01:37 UTC)
Expired: Apr 23, 2000, 9:30 PM CDT
In force: 53 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Grant Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 77 km from the middle of the area, began a volume at 01:39 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
Apr 23, 9:25 PM CDT	Thunderstorm Wind 60 E	Winnfield, LA	Numerous trees down in town.

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
Apr 23, 8:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.6 hours before the alert went out and 134 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: 1042 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 1141 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 368 m²/s²
0-3 km storm-relative helicity: 558 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 11.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS54 KSHV 240138
TORSHV
LAC043-127-240230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
ISSUED BY JACKSON MS
837 PM CDT SUN APR 23 2000

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* TORNADO WARNING FOR...
  GRANT PARISH IN NORTH CENTRAL LOUISIANA
  WINN PARISH IN NORTH CENTRAL LOUISIANA

* UNTIL 930 PM CDT

* AT 837 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 24 MILES NORTHWEST OF COLFAX...OR ABOUT 14 MILES SOUTHWEST
  OF WINNFIELD...MOVING EAST AT 40 MPH.

TORNADOES AT NIGHT ARE ESPECIALLY DANGEROUS. DO NOT WAIT UNTIL YOU 
SEE OR HEAR THE TORNADO - IT MAY BE TOO LATE. TAKE COVER NOW!

62

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 7:00 PM CDT	Severe Thunderstorm Warning	SHV	Red River	45 min
Apr 23, 7:06 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	39 min
Apr 23, 7:10 PM CDT	Tornado Warning	SHV	Caddo	60 min
Apr 23, 7:16 PM CDT	Tornado Warning	SHV	Red River	59 min
Apr 23, 7:17 PM CDT	Tornado Warning	SHV	Lincoln	58 min
Apr 23, 7:21 PM CDT	Tornado Warning	SHV	Bossier	54 min
Apr 23, 7:25 PM CDT	Tornado Warning	SHV	Bienville	65 min
Apr 23, 7:51 PM CDT	Tornado Warning	SHV	Natchitoches	54 min
Apr 23, 7:56 PM CDT	Severe Thunderstorm Warning	SHV	De Soto	64 min
Apr 23, 8:22 PM CDT	Tornado Warning	SHV	Jackson, Lincoln, Ouachita	53 min
Apr 23, 8:41 PM CDT	Tornado Warning	SHV	Union	19 min
Apr 23, 9:00 PM CDT	Tornado Warning	SHV	Union	15 min
Apr 23, 9:12 PM CDT	Severe Thunderstorm Warning	SHV	LaSalle	48 min
Apr 23, 9:18 PM CDT	Severe Thunderstorm Warning	SHV	Ouachita	42 min
Apr 23, 9:20 PM CDT	Severe Thunderstorm Warning	SHV	Sabine	40 min
Apr 23, 9:24 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Winn	36 min
Apr 23, 9:30 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell	30 min

Nearby

Tornado Warnings in Louisiana, 2000 Every tornado warning in 2000 Tornadoes in 2000

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.