Alert archive / Texas / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 223, NWS Shreveport, LA

May 10, 2000Angelina County, Texas

NWS Shreveport, LA issued this severe thunderstorm warning at May 10, 2000, 12:50 AM CDT for Angelina County, Texas. It was in force for 25 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
May 10, 2000, 12:50 AM CDT (05:50 UTC)
Expired
May 10, 2000, 1:15 AM CDT
In force
25 min
Issued by
NWS Shreveport, LA
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Angelina County, TX

The radar

The Shreveport radar (KSHV), 152 km from the middle of the area, began a volume at 05:52 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

TimeReportWhereRemark
May 10, 12:57 AM CDTThunderstorm Wind 52 EZavalla, TXNumerous trees down.

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, 5.8 hours before the alert went out and 159 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2000-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2142 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2000-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2142 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
804 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
1.2
Supercell composite
6.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 3:10 PM CDT, 9 hours 40 minutes earlier.

Area forecast discussion, May 9, 3:10 PM CDT, 9 hours 40 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
310 PM CDT TUE MAY 9 2000

COLD FRONT BETWEEEN TXK AND EXTREME NORTHWEST CORNER OF LA. BAND OF
SHOWERS TRYING TO DEVELOP ALONG BOUNDARY...AND LOWER CLOUD ENVELOPE
CLEARLY SEEN ON VISIBLE IMAGERY BEHIND BOUNDARY. FRONT STALL OUT
EAST TX BEFORE WASHING OUT SO WILL NEED TO LEAVE POPS IN PAST
MIDNIGHT. DEEPER CONVECTION KICKING OFF ANOTHER BAND SOUTH OF
TOLEDO BEND IN MORE UNSTABLE AIR. THIS SECONDARY AREA SHOULD NOT
HAVE MUCH INFLUENCE ON FORECAST STARTING THIS EVENING. MOSTLY CLOUDY
TONIGHT DUE TO FRONTAL AND POST FRONTAL CLOUDS...FOLLOWED BY
SEASONABLE WARMTH ON WED. SURFACE LOW DEEPENS SIGNIFICANTLY OVER CO
WED NIGHT AND MOVES INTO CENTRAL PLAINS THU. PRESSURE GRADIENT
INDUCED WARM AIR ADVECTION COMBINED WITH FAIRLY DRY AIR RESULT IN
WARMEST DAY OF YEAR TO DATE ON THU. MOST OF AREA SHOULD REACH 90
MARK...AND CONTINUE INTO FRI BEFORE INCREASED CLOUDS AND POSSIBLE
RAIN OVER WEEKEND.

SHV 63/85/68/91  3000    TYR 60/84/70/91 2000
MLU 65/82/67/90  4000    LFK 67/87/70/90 3000
TXK 61/82/69/90  1000

.SHV...NONE.

ELEVEN

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 11:45 PM CDTFlash Flood WarningSHVSan Augustine4 hr
May 10, 12:56 AM CDTFlash Flood WarningSHVAngelina3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2000Every 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.