Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 128, NWS Shreveport, LA

April 7, 2000Smith County, Wood County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 7, 2000, 7:12 PM CDT for Smith County, Wood County, Texas. It was in force for 63 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 7, 2000, 7:12 PM CDT (00:12 UTC)
Expired: Apr 7, 2000, 8:15 PM CDT
In force: 63 min
Issued by: NWS Shreveport, LA
Area: Whole counties

Counties Smith County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 140 km from the middle of the area, began a volume at 00:12 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 7, 8:00 PM CDT	Hail 0.75	Tyler, 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, 0.2 hours before the alert went out and 148 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: 1646 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1454 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

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

845 
WUUS54 KSHV 080016
SVRSHV
TXC423-499-080115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
712 PM CDT FRI APR 7 2000

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SMITH COUNTY IN TEXAS
  WOOD COUNTY IN TEXAS

* UNTIL 815 PM CDT

* AT 712 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM OVER QUITMAN...OR ABOUT 8    
  MILES NORTH OF MINEOLA...MOVING SOUTHEAST AT 25 MPH. THE 
  THUNDERSTORM WILL MOVE INTO NORTHERN SMITH COUNTY AND MOVE
  TOWARD THE LINDALE AND TYLER AREAS. 
 
* THIS SEVERE THUNDERSTORM WILL BE NEAR...
  MINEOLA AROUND 725 PM
  LINDALE IN SMITH COUNTY AROUND 750 PM

THIS THUNDERSTORM WILL PRODUCE LARGE HAIL UP TO ONE INCH IN 
DIAMETER. DO NOT REMAIN OUTSIDE...HEAD FOR A STRONG BUILDING.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
  EASTERN SMITH COUNTY IN TEXAS
  WOOD COUNTY IN TEXAS
UNTIL 815 PM CDT.

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 Apr 7, 3:00 PM CDT, 4 hours 12 minutes earlier.

Area forecast discussion, Apr 7, 3:00 PM CDT, 4 hours 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
300 PM CDT FRI APR 7 2000

FRONT STILL WEST OF CWFA THIS AFTERNOON AND THUNDERSTORM ACTIVITY IS
ONLY ACTIVE WELL TO THE NORTH. FEEL AS FRONT MOVES INTO DEEPER
MOISTURE THIS EVENING...SCATTERED THUNDERSTORMS WILL FIRE...AND
INCREASE AS COVERAGE AS THEY PROGRESS TO THE EAST. THINKING IS THEY
WILL BECOME WIDELY SCATTERED ALONG A TXK-GGG-LFK LINE AND MORE
ORGANIZED ACROSS SOUTHWEST ARKANSAS AND NORTH LOUISIANA AROUND MID
EVENING. WITH LIFTED INDICES AROUND MINUS 10 AND STEEP MID LEVEL
LAPSE RATES...A FEW STORMS WILL BE SEVERE. MAIN THREAT IS STRONG
WIND AND HAIL.

FRONT HAS A GOOD PUNCH AND MUCH COOLER TEMPS WILL BE FELT SATURDAY
AND ESPECIALLY SUNDAY MORNING...WHEN SCATTERED FROST WILL BE LIKELY
IN LOW LYING AREAS. NEXT CHANCE OF RAIN ON TUESDAY...BUT MRF SEEMS
TO BE BACKING DOWN ON POPS.

PRELIMS...
SHV 47/63/37/70 3000
MLU 48/63/36/6f9 4000
TXK 47/62/37/69 2000
TYR 45/66/39/71 1000
LFK 47/65/35/73 2000

.SHV...NONE.

14

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 7:14 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass	61 min
Apr 7, 8:18 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Rusk, Smith	57 min
Apr 7, 8:18 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	57 min
Apr 7, 8:43 PM CDT	Tornado Warning	SHV	Cherokee, Nacogdoches, Rusk	62 min
Apr 7, 9:18 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	42 min
Apr 7, 9:45 PM CDT	Severe Thunderstorm Warning	SHV	Nacogdoches	60 min
Apr 7, 10:24 PM CDT	Severe Thunderstorm Warning	SHV	Angelina	51 min

Nearby

Severe Thunderstorm Warnings in Texas, 2000 Every severe thunderstorm warning 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.