Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 65, NWS Shreveport, LA

May 9, 2002Smith County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 9, 2002, 9:51 PM CDT for Smith County, Texas. It was in force for 54 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 9, 2002, 9:51 PM CDT (02:51 UTC)
Expired: May 9, 2002, 10:45 PM CDT
In force: 54 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Smith County, TX

The radar

The Shreveport radar (KSHV), 134 km from the middle of the area, began a volume at 02:55 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
May 9, 9:55 PM CDT	Hail 1.75	Tyler, TX	Troop Highway at East Southeast Loop.
May 9, 9:55 PM CDT	Hail 0.88	Tyler, TX	Corner of Highway 64 and the Loop.
May 9, 10:05 PM CDT	Hail 0.88	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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 2.9 hours before the alert went out and 143 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: 3256 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 1148 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSHV 100251
SVRSHV
TXC423-100345-
/NEW.KSHV.SV.W.0132.100250-100345/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
950 PM CDT THU MAY 9 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

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

* UNTIL 1045 PM CDT

* AT 950 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER  
  RADAR INDICATED A SEVERE THUNDERSTORM NEAR TYLER...MOVING          
  NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE OVER...
  RURAL CENTRAL SMITH COUNTY AT 1000 PM CDT
  RURAL EASTERN SMITH COUNTY AT 1020 PM CDT

THIS THUNDERSTORM WILL PRODUCE LARGE HAIL AND STRONG DAMAGING WINDS.
DO NOT REMAIN OUTSIDE.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
  SMITH COUNTY IN NORTHEAST TEXAS
UNTIL 1045 PM CDT.

LAT...LON 3229 9543 3217 9528 3234 9504 3255 9514

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 May 9, 9:46 PM CDT, 5 minutes earlier.

Area forecast discussion, May 9, 9:46 PM CDT, 5 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
946 PM CDT THU MAY 9 2002

FRONTAL BOUNDARY EXTENDS FROM JUST SOUTH OF MLU TO JUST SOUTH
OF SHV TO BETWEEN GGG AND OCH TO NEAR TPL. STORMS ARE INCREASING
ACROSS NORTH TX...NORTH OF BOUNDARY AS LOW LEVEL JET INCREASES
AND SHORT WAVE OVER WEST TX APPROACHES. DECENT SHEAR TO THE NORTH
OF BOUNDARY FOR THE REMAINDER OF THE NIGHT AND DIV. ELEVATED SEVERE
STORMS POSSIBLE OVER THE WEST. BOUNDARY WILL NOT GO MUCH FARTHER
SOUTH TONIGHT. THE SKY IS MOSTLY CLOUDY TO THE NORTH OF THE FRONT.
UPDATED TO ADD SEVERE TO THE NORTHWEST...ADJUSTED TEMPS UP A TAD
AND WORDED SKY AS MOSTLY CLOUDY OR BECOMING MOSTLY CLOUDY SOUTH.

IV

.SHV...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 10:14 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	61 min
May 9, 10:28 PM CDT	Severe Thunderstorm Warning	SHV	Gregg	62 min
May 9, 10:44 PM CDT	Severe Thunderstorm Warning	SHV	Upshur	61 min
May 10, 12:08 AM CDT	Severe Thunderstorm Warning	SHV	Bowie	67 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every severe thunderstorm warning in 2002

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.