Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 152, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Jun 18, 1997, 2:00 PM CDT for Brazoria County, Texas. It was in force for 45 min. 2 reports 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
- Jun 18, 1997, 2:00 PM CDT (19:00 UTC)
- Expired
- Jun 18, 1997, 2:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Brazoria County, TX
The radar
The Houston radar (KHGX), 48 km from the middle of the area, began a volume at 19:03 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 |
|---|---|---|---|
| Jun 18, 2:12 PM CDT | Thunderstorm Wind 50 | Angleton, TX | |
| Jun 18, 2:27 PM CDT | Thunderstorm Wind 52 | Clute, TX | Large limbs blown 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.0 hours before the alert went out and 240 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.
- Mixed-layer CAPE
- 544 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 817 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -2.0
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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 9:30 AM CDT, 4 hours 30 minutes earlier.
Area forecast discussion, Jun 18, 9:30 AM CDT, 4 hours 30 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 930 AM CDT WED JUN 18 1997 AS PER PREV FCST DISCUSSION...AIR MASS REMAINS QUITE MOIST ...W/HI CAPES (1500 J/KG AND ABOVE) OVR RGN. REMNANTS OF YESTERDAYS WEAK FNTL BOUNDARY EVIDENT OVR EXTREME NRN ZNS. 03Z MESO-ETA INDICATE LO LVL CONFLUENCE ZONE OVR FA LINGERING OVR SE TX THRU THURSDAY MRNG. UPPER LVL IMPULSE MOVG ACRS TONITE WL REINFORCE SHEAR ZONE OVR RGN PSBLY TRIGERRING ANOTHER ROUND OF LATE EVE TO EARLY MRNG TSTMS...IF MESO ETA IS CORRECT. MEANTIME...DAYTIME HEATING AND SEABREEZE WL BE SUFFICIENT TO TRIGGER TSTMS OVR RGN...SO 1ST PD NUMBERS LOOKS OK. 1ST THOUGHTS... 37
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 2:15 PM CDT | Flash Flood Warning | HGX | Brazoria | 3 hr |
| Jun 18, 2:26 PM CDT | Tornado Warning | HGX | Brazoria, Matagorda | 34 min |
| Jun 18, 3:05 PM CDT | Severe Thunderstorm Warning | HGX | Matagorda | 40 min |
| Jun 18, 3:41 PM CDT | Severe Thunderstorm Warning | HGX | Jackson | 49 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.