Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 61, NWS Shreveport, LA

May 2, 2002Shelby County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 2, 2002, 8:59 PM CDT for Shelby County, Texas. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 2, 2002, 8:59 PM CDT (01:59 UTC)
Expired: May 2, 2002, 10:00 PM CDT
In force: 61 min
Issued by: NWS Shreveport, LA
Area: Counties, with a storm outline in the text

County Shelby County, TX

The radar

The Shreveport radar (KSHV), 67 km from the middle of the area, began a volume at 02:01 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.

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, 2.0 hours before the alert went out and 74 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: 2991 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 829 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 4.3
Supercell composite: 16.4

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KSHV 030159
SVRSHV
TXC419-030300-
/NEW.KSHV.SV.W.0127.030158-030300/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
858 PM CDT THU MAY 2 2002

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SHELBY COUNTY IN EASTERN TEXAS

* UNTIL 1000 PM CDT

* AT 858 PM CDT...THE SHREVEPORT NATIONAL WEATHER SERVICE DOPPLER
  RADAR INDICATED A SEVERE THUNDERSTORM OVER TENAHA...OR ABOUT 10
  MILES NORTH OF CENTER...MOVING EAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  OVER JOAQUIN AT 915 PM CDT

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

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE STORM IN A STRONG
BUILDING.

REPEATING...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE
THUNDERSTORM WARNING FOR...
  SHELBY COUNTY IN EASTERN TEXAS
UNTIL 1000 PM CDT.


LAT...LON 3198 9438 3182 9422 3184 9391 3198 9402

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 2, 2:45 PM CDT, 6 hours 14 minutes earlier.

Area forecast discussion, May 2, 2:45 PM CDT, 6 hours 14 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
245 PM CDT THU MAY 2 2002

COLD FRONT CONTINUES TO PUSH WEAKLY INTO THE AREA THIS AFTERNOON.
THE FRONT IS EXPECTED TO BECOME NEARLY STATIONARY ACROSS THE AREA
TONIGHT THROUGH TOMORROW...AND WILL BE THE FOCUS FOR CONVECTIVE
DEVELOPMENT IN THE SHORT TERM. LOOKING AT THE ONGOING
CONVECTION...WILL GO WITH SCATTERED POPS UP NORTH...AND SLIGHT
CHANCE FARTHER SOUTH. A S/WV MOVING TO OUR NORTH LATE TOMORROW IS
EXPECTED TO GIVE THE BOUNDARY A LITTLE BIT OF A PUSH...MOVING IT
PERHAPS JUST SOUTH OF OUR AREA. THE BOUNDARY WILL BE QUITE DIFFUSE
BY TOMORROW NIGHT...WITH WEAK CONVERGENCE. THE ETA FORECASTS A WEAK
SFC LOW TO MOVE ALONG THE BOUNDARY TOMORROW...AND WITH A VERY WARM
AND UNSTABLE AIRMASS OVER MUCH OF THE AREA...BELIEVE TOMORROW MAY BE
OUR BEST CHANCE FOR SIGNIFICANT CONVECTION...AND POSSIBLY SEVERE.
WILL NOT MENTION SEVERE IN THIS SET OF ZONES...AS IT IS STILL
UNCERTAIN AS TO THE EXTENT OF THE THREAT. MEDIUM RANGE GUIDANCE
SEEMS TO BE TAKING THE STORM TRACK BACK FARTHER NORTH TOWARD THE
BEGINNING OF NEXT WEEK...SO WILL HAVE LITTLE IN THE WAY OF RAIN
CHANCES AFTER SUNDAY.

TEMPERATURES ARE TRICKY IN THE SHORT TERM...WITH THE BOUNDARY AND
EXTENSIVE CLOUD COVER AROUND THE AREA. THE ETA GENERALLY HAD THE
WARMEST TEMPS...AS IT IS NOT BRINGING THE BOUNDARY AS FAR SOUTH AS
THE OTHER MODELS. BELIEVE THE ETA IS PROBABLY TOO WARM IN MANY
PLACES...SO WE GENERALLY HELD BELOW IT...AND CLOSER TO THE FWC. THE
MAV LOOKS TOO COOL GENERALLY.

FCSTID = 5
SHV   67  80  66  86 /  30  40   0   0
MLU   68  79  69  84 /  20  40   0   0
TXK   62  78  62  85 /  40  40   0   0
TYR   65  79  64  87 /  30  40   0  30
LFK   70  86  71  88 /  20  20   0  30

.SHV...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 2, 8:24 PM CDT	Severe Thunderstorm Warning	SHV	Shelby	36 min
May 3, 7:54 AM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	66 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.