Alert archive / Texas / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 4, NWS Shreveport, LA

January 6, 1998Harrison County, Marion County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 6, 1998, 12:33 AM CST for Harrison County, Marion County, Texas. It was in force for 57 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 6, 1998, 12:33 AM CST (06:33 UTC)
Expired: Jan 6, 1998, 1:30 AM CST
In force: 57 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Harrison County, TX, Marion County, TX

The radar

The Shreveport radar (KSHV), 55 km from the middle of the area, began a volume at 06:32 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 6, 12:45 AM CST	Hail 1.75	Harleton, TX

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 nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.6 hours before the alert went out and 61 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: 631 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 676 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

350 
WUUS1 KSHV 060634 RRA
SVRSHV
TXC203-315-060730-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
1233 AM CST TUE JAN 6 1998
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 AM CST
FOR THE FOLLOWING AREAS...
 
IN NORTHEAST TEXAS
 
   ...NORTHERN HARRISON COUNTY...MARION COUNTY
 
AT 1235 AM CST DOPPLER RADAR INDICATED A LINE OF SEVERE
THUNDERSTORMS OVER MARION AND HARRISON COUNTY WHICH EXTENDED
FROM NEAR LAKE OF THE PINES SOUTH TO ABOUT 10 MILES NORTH OF
LONGVIEW IN GREGG COUNTY.
 
THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT ABOUT 20
MPH AND WILL BE ACCOMPANIED BY LARGE HAIL THE SIZE OF
GOLFBALLS TO NEAR BASEBALLS ALONG WITH WINDS IN EXCESS OF
60 MPH.
 
ALSO BE ALERT TO BRIEF BUT VERY HEAVY RAINS WITH AMOUNTS IN
EXCESS OF 2 TO 3 INCHES PER HOUR.
 
 
IF YOU ARE IN THE PATH OF THIS STORM...TAKE IMMEDIATE STEPS TO
PROTECT YOURSELF AND YOUR PROPERTY...SUCH AS YOUR CAR...BOAT...AND
PETS...FROM LARGE HAIL AND DAMAGING WIND.

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 5, 9:15 PM CST, 3 hours 18 minutes earlier.

Area forecast discussion, Jan 5, 9:15 PM CST, 3 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
915 PM CST MON JAN 5 1998

STORMS CONTINUE TO DEVELOP IN CENTRAL TX AND MOVING EAST NORTHEAST.
CURRENTLY ONLY ISOLATED THUNDERSTORMS ARE LOCATED IN NORTHEAST TEXAS
BUT AN INCREASE IS EXPECTED LATER TONIGHT.  INVITATIONS HAVE BEEN SENT
OUT TO THE MIDNIGHT SHIFT FOR A THUNDEROUS PARTY.  SO UNTIL THEN WILL
ONLY DO A MINOR DRESSING TO THE FORECAST.

ELEVEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 5, 6:51 PM CST	Severe Thunderstorm Warning	SHV	Angelina	54 min
Jan 5, 10:48 PM CST	Tornado Warning	SHV	Smith	57 min
Jan 5, 11:23 PM CST	Flash Flood Warning	SHV	Smith	3 hr
Jan 5, 11:43 PM CST	Tornado Warning	SHV	Smith	32 min
Jan 5, 11:46 PM CST	Tornado Warning	SHV	Upshur	59 min
Jan 5, 11:53 PM CST	Severe Thunderstorm Warning	SHV	Gregg	52 min
Jan 6, 12:28 AM CST	Severe Thunderstorm Warning	SHV	Cass	62 min
Jan 6, 1:00 AM CST	Flash Flood Warning	SHV	Gregg, Upshur	3 hr
Jan 6, 1:22 AM CST	Severe Thunderstorm Warning	SHV	Bowie	53 min
Jan 6, 1:26 AM CST	Severe Thunderstorm Warning	SHV	Gregg	49 min
Jan 6, 1:53 AM CST	Flash Flood Warning	SHV	Cass, Marion	3 hr
Jan 6, 2:36 AM CST	Flash Flood Warning	SHV	Bowie	3 hr
Jan 6, 5:25 AM CST	Severe Thunderstorm Warning	SHV	Panola	65 min
Jan 6, 12:10 PM CST	Flash Flood Warning	SHV	Sabine, San Augustine, Shelby	4 hr
Jan 6, 2:34 PM CST	Flash Flood Warning	SHV	Smith	3 hr
Jan 6, 3:00 PM CST	Flash Flood Warning	SHV	Angelina	3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1998 Every severe thunderstorm warning in 1998

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.