Alert archive / Texas / Flash Flood Warnings in 2019
Flash Flood Warning 28, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at Jul 15, 2019, 5:21 AM CDT for San Jacinto County, Texas. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 15, 2019, 5:21 AM CDT (10:21 UTC)
- Expired
- Jul 15, 2019, 7:15 AM CDT
- In force
- 114 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
- Flood severity
- None
County San Jacinto County, TX
The radar
The Houston radar (KHGX), 124 km from the middle of the area, began a volume at 10:24 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 00:00Z, 10.4 hours before the alert went out and 196 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
- 693 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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 Jul 15, 4:10 AM CDT, 1 hour 11 minutes earlier.
Area forecast discussion, Jul 15, 4:10 AM CDT, 1 hour 11 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 |
|---|---|---|---|---|
| Jul 14, 8:00 PM CDT | Special Marine Warning | HGX | 60 min | |
| Jul 15, 4:28 AM CDT | Areal Flood Advisory | HGX | Liberty, Polk, San Jacinto | 2 hr |
| Jul 15, 10:04 AM CDT | Beach Hazards Statement | HGX | Galveston, Matagorda | 12 hr |
| Jul 15, 11:32 AM CDT | Special Weather Statement | HGX | Montgomery | 43 min |
| Jul 15, 11:43 AM CDT | Special Weather Statement | HGX | Harris | 47 min |
| Jul 15, 12:55 PM CDT | Special Weather Statement | HGX | Montgomery | 50 min |
| Jul 15, 1:18 PM CDT | Areal Flood Advisory | HGX | Grimes, Harris, Montgomery, Waller | 117 min |
| Jul 15, 1:52 PM CDT | Areal Flood Advisory | HGX | Montgomery | 53 min |
| Jul 15, 1:53 PM CDT | Special Weather Statement | HGX | Harris | 52 min |
| Jul 15, 2:40 PM CDT | Special Weather Statement | HGX | Grimes | 50 min |
| Jul 15, 4:59 PM CDT | Special Weather Statement | HGX | Liberty | 31 min |
Nearby
Flash Flood Warnings in Texas, 2019Every flash flood warning in 2019
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.