Alert archive / Texas / Tornado Warnings in 2002

Tornado Warning 12, NWS Houston/Galveston, TX

August 15, 2002Galveston County, Texas

NWS Houston/Galveston, TX issued this tornado warning at Aug 15, 2002, 11:59 AM CDT for Galveston County, Texas. It was in force for 31 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
Aug 15, 2002, 11:59 AM CDT (16:59 UTC)
Expired
Aug 15, 2002, 12:30 PM CDT
In force
31 min
Issued by
NWS Houston/Galveston, TX
Area
Counties, with a storm outline in the text

County Galveston County, TX

The radar

The Houston radar (KHGX), 22 km from the middle of the area, began a volume at 17:01 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 5.0 hours before the alert went out and 189 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, Lake Charles Mun, LA at 12:00Z on 2002-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 248 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, Lake Charles Mun, LA at 12:00Z on 2002-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
248 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
765 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

011 
WFUS54 KHGX 151659
TORHOU
TXC167-151730-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1159 AM CDT THU AUG 15 2002

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
  GALVESTON COUNTY IN SOUTHEAST TEXAS

* UNTIL 1230 PM CDT

* AT 1156 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF 
PRODUCING A TORNADO OVER WEST BAY NEAR TIKI ISLAND...MOVING NORTH 
NORTHEAST AT 20 MPH.

* LOCATIONS IN THE PATH OF THE TORNADO INCLUDE...
  TIKI ISLAND
  BAYOU VISTA
  LA MARQUE
  TEXAS CITY
  SAN LEON

MOVE TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR. ABANDON YOUR CAR
OR MOBILE HOME FOR A STRONG SHELTER NOW

PLEASE REPORT SEVERE WEATHER TO THE COUNTY SHERIFF...LOCAL POLICE...
OR DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 2922 9504 2918 9484 2948 9474 2951 9498

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 1:55 AM CDTSpecial Marine WarningHGX2 hr
Aug 15, 3:47 AM CDTFlash Flood WarningHGXBrazoria, Galveston118 min
Aug 15, 4:00 AM CDTSpecial Marine WarningHGX2 hr
Aug 15, 4:33 AM CDTSevere Thunderstorm WarningHGXGalveston5 hr
Aug 15, 5:48 AM CDTFlash Flood WarningHGXBrazoria, Galveston2 hr
Aug 15, 7:28 AM CDTSpecial Marine WarningHGX62 min
Aug 15, 7:43 AM CDTFlash Flood WarningHGXGalveston107 min
Aug 15, 8:22 AM CDTSpecial Marine WarningHGX53 min
Aug 15, 8:47 AM CDTSevere Thunderstorm WarningHGXHarris34 hr
Aug 15, 9:13 AM CDTSpecial Marine WarningHGX2 hr
Aug 15, 10:26 AM CDTFlash Flood WarningHGXHarris3 hr
Aug 15, 10:34 AM CDTFlash Flood WarningHGXGrimes, Waller, Washington3 hr
Aug 15, 11:10 AM CDTFlash Flood WarningHGXBrazoria, Galveston3 hr
Aug 15, 11:13 AM CDTSpecial Marine WarningHGX2 hr
Aug 15, 11:37 AM CDTTornado WarningHGXGalveston23 min
Aug 15, 1:14 PM CDTFlash Flood WarningHGXGrimes, Waller, Washington3 hr
Aug 15, 1:19 PM CDTSpecial Marine WarningHGX116 min
Aug 15, 1:45 PM CDTFlash Flood WarningHGXBrazoria, Galveston, Harris3 hr
Aug 15, 3:47 PM CDTFlash Flood WarningHGXWaller, Washington2 hr
Aug 15, 3:55 PM CDTFlash Flood WarningHGXHarris3 hr
Aug 15, 4:51 PM CDTFlash Flood WarningHGXBrazoria, Galveston3 hr
Aug 15, 6:10 PM CDTSpecial Marine WarningHGX2 hr
Aug 15, 6:10 PM CDTSpecial Marine WarningHGX2 hr

Nearby

Tornado Warnings in Texas, 2002Every tornado warning in 2002Tornadoes 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.