Alert archive / Texas / Tornado Warnings in 1998

Tornado Warning 49, NWS Houston/Galveston, TX

October 6, 1998Fort Bend County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Oct 6, 1998, 7:15 AM CDT for Fort Bend County, Texas. It was in force for 65 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
Oct 6, 1998, 7:15 AM CDT (12:15 UTC)
Expired
Oct 6, 1998, 8:20 AM CDT
In force
65 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Fort Bend County, TX

What was reported inside it

TimeReportWhereRemark
Oct 6, 7:20 AM CDTTornado F0Needville, TXTrees down in Needville. Trees and powerlines down across eastern portions of the county.

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

Corpus Christi, TX (KCRP), launched 12:00Z, 0.3 hours before the alert went out and 252 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, Corpus Christi, TX at 12:00Z on 1998-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4460 joules per kilogram.LCLEL10008507005003002001001 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, Corpus Christi, TX at 12:00Z on 1998-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.193958Sfc1 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
4460 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
3.6
Supercell composite
19.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHOU 061215 RRA
TORHOU
TXC157-061320-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
715 AM CDT TUE OCT 6 1998

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A

* TORNADO WARNING FOR...
  FORT BEND COUNTY IN SOUTHEASTERN TEXAS

* UNTIL 820 AM CDT

* AT 715 AM... WEATHER RADAR INDICATED A TORNADIC THUNDERSTORM 3
  MILES SOUTH OF RICHMOND... MOVING NORTHEAST NEAR 20 MPH.

* THE TORNADIC STORM IS EXPECTED TO APPROACH SUGARLAND AROUND 730
  AM.

IF YOU ARE IN THESE AREAS... SEEK SAFETY IN A SMALL INTERIOR ROOM
AWAY FROM WINDOWS.

The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 6, 3:36 AM CDTFlash Flood WarningHGXBurleson3 hr
Oct 6, 4:08 AM CDTFlash Flood WarningHGXHouston2 hr
Oct 6, 5:24 AM CDTFlash Flood WarningHGXColorado2 hr
Oct 6, 5:37 AM CDTFlash Flood WarningHGXMontgomery, Walker3 hr
Oct 6, 6:10 AM CDTFlash Flood WarningHGXSan Jacinto2 hr
Oct 6, 6:24 AM CDTFlash Flood WarningHGXTrinity2 hr
Oct 6, 6:48 AM CDTFlash Flood WarningHGXJackson, Matagorda, Wharton2 hr
Oct 6, 7:38 AM CDTFlash Flood WarningHGXLiberty117 min
Oct 6, 7:48 AM CDTSevere Thunderstorm WarningHGXBrazoria, Galveston, Harris57 min
Oct 6, 8:39 AM CDTSevere Thunderstorm WarningHGXChambers, Galveston61 min
Oct 6, 9:39 AM CDTSevere Thunderstorm WarningHGXChambers, Galveston61 min

Nearby

Tornado Warnings in Texas, 1998Every tornado warning in 1998Tornadoes 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.