Alert archive / Texas / Flash Flood Watches in 2015
Flash Flood Watch 2, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood watch at Mar 20, 2015, 3:33 AM CDT for 14 counties in Texas. It took effect at Mar 20, 2015, 12:00 PM CDT. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Mar 20, 2015, 3:33 AM CDT (08:33 UTC)
- In effect from
- Mar 20, 2015, 12:00 PM CDT
- Expired
- Mar 21, 2015, 6:27 PM CDT
- In force
- 30 hr
- Issued by
- NWS Houston/Galveston, TX
- Flood severity
- None
Counties Austin County, TX, Brazos County, TX, Burleson County, TX, Colorado County, TX, Grimes County, TX, Houston County, TX, Madison County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 137 km from the middle of the area, began a volume at 08:35 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
Fort Worth, TX (KFWD), launched 00:00Z, 8.6 hours before the alert went out and 292 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
- 45 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 1316 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Mar 20, 12:55 AM CDT, 2 hours 38 minutes earlier.
Area forecast discussion, Mar 20, 12:55 AM CDT, 2 hours 38 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 |
|---|---|---|---|---|
| Mar 19, 10:32 PM CDT | River Flood Warning | HGX | Jackson | 21 hr |
| Mar 20, 11:27 AM CDT | Marine Dense Fog Advisory | HGX | 23 hr | |
| Mar 20, 2:46 PM CDT | River Flood Warning | HGX | Burleson, Lee | 4 days |
| Mar 20, 4:08 PM CDT | Special Weather Statement | HGX | San Jacinto | 37 min |
Nearby
Flash Flood Watches in Texas, 2015Every flash flood watch in 2015
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.