Alert archive / Texas / Flash Flood Warnings in 1998
Flash Flood Warning 42, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Sep 10, 1998, 9:42 AM CDT for Brazoria County, Matagorda County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 10, 1998, 9:42 AM CDT (14:42 UTC)
- Expired
- Sep 10, 1998, 12:40 PM CDT
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
Counties Brazoria County, TX, Matagorda County, TX
The radar
The Houston radar (KHGX), 83 km from the middle of the area, began a volume at 14:45 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
Corpus Christi, TX (KCRP), launched 12:00Z, 2.7 hours before the alert went out and 211 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
- 7 J/kg
- Mixed-layer CIN
- -166 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 241 m²/s²
- 0-3 km storm-relative helicity
- 298 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 flash flood 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 flash flood warning went out at Sep 10, 9:40 AM CDT, 2 minutes earlier.
Area forecast discussion, Sep 10, 9:40 AM CDT, 2 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 8:55 AM CDT | Tornado Warning | HGX | Matagorda | 35 min |
| Sep 10, 9:16 AM CDT | Tornado Warning | HGX | Brazoria | 44 min |
| Sep 10, 5:51 PM CDT | Flash Flood Warning | HGX | Brazoria, Matagorda | 4 hr |
| Sep 10, 6:47 PM CDT | Tornado Warning | HGX | Brazoria | 58 min |
Nearby
Flash Flood Warnings in Texas, 1998Every flash flood warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.