Alert archive / Louisiana / Tornado Warnings in 1999

Tornado Warning 21, NWS Shreveport, LA

January 22, 1999Natchitoches Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Jan 22, 1999, 11:27 AM CST for Natchitoches Parish, Louisiana. It was in force for 58 min. 2 reports 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 22, 1999, 11:27 AM CST (17:27 UTC)
Expired: Jan 22, 1999, 12:25 PM CST
In force: 58 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Natchitoches Parish, LA

The radar

The Ft Polk radar (KPOE), 64 km from the middle of the area, began a volume at 17:28 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 22, 11:40 AM CST	Hail 0.88	Chopin, LA
Jan 22, 12:09 PM CST	Tornado F0	Gorum, LA	Tornado occurred over an unpopulated wooded swamp area.

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 22, 9:45 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.5 hours before the alert went out and 179 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: 2024 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 561 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 9.8

Open this sounding in Storm Lab

The text

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

999 
WFUS1 KSHV 221730 RRA
TORSHV
LAC069-221825-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1127 AM CST FRI JAN 22 1999

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NATCHITOCHES PARISH IN NORTHWESTERN LOUISIANA

* UNTIL 1225 PM CST

* AT 1125 AM CST... THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A TORNADO 20 MILES SOUTH OF NATCHITOCHES NEAR MINK.
  THE THUNDERSTORM CONTAINING THIS TORNADO WAS MOVING NORTHEAST AT 20
  MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  CYPRESS AROUND NOON OR 1200 PM


THIS THUNDERSTORM CAN PRODUCE A TORNADO THAT IS OBSCURED BY
RAIN AND DIFFICULT TO SEE. GO TO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF YOUR HOME OR BUSINESS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 21, 6:33 PM CST	Severe Thunderstorm Warning	SHV	Ouachita	42 min
Jan 21, 8:40 PM CST	Tornado Warning	SHV	LaSalle	50 min
Jan 22, 12:01 AM CST	Severe Thunderstorm Warning	SHV	Caddo	64 min
Jan 22, 12:20 AM CST	Severe Thunderstorm Warning	SHV	Bossier	60 min
Jan 22, 12:38 AM CST	Severe Thunderstorm Warning	SHV	Webster	62 min
Jan 22, 1:38 AM CST	Tornado Warning	SHV	Union	47 min
Jan 22, 1:49 AM CST	Severe Thunderstorm Warning	SHV	Claiborne	46 min
Jan 22, 4:31 AM CST	Severe Thunderstorm Warning	SHV	Natchitoches	49 min
Jan 22, 4:37 AM CST	Severe Thunderstorm Warning	SHV	Sabine	48 min
Jan 22, 4:46 AM CST	Tornado Warning	SHV	Natchitoches	49 min
Jan 22, 5:01 AM CST	Tornado Warning	SHV	Red River	49 min
Jan 22, 5:10 AM CST	Severe Thunderstorm Warning	SHV	De Soto, Red River	50 min
Jan 22, 5:40 AM CST	Tornado Warning	SHV	Bienville	45 min
Jan 22, 5:44 AM CST	Tornado Warning	SHV	Jackson	46 min
Jan 22, 5:56 AM CST	Severe Thunderstorm Warning	SHV	Lincoln	49 min
Jan 22, 6:10 AM CST	Tornado Warning	SHV	Lincoln	35 min
Jan 22, 6:17 AM CST	Tornado Warning	SHV	Ouachita	48 min
Jan 22, 6:38 AM CST	Severe Thunderstorm Warning	SHV	Union	47 min
Jan 22, 7:22 AM CST	Flash Flood Warning	SHV	Bossier, Caddo, De Soto	4 hr
Jan 22, 7:22 AM CST	Flash Flood Warning	SHV	Webster	4 hr
Jan 22, 11:51 AM CST	Tornado Warning	SHV	Grant	44 min

Nearby

Tornado Warnings in Louisiana, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.