Alert archive / Texas / Flash Flood Watches in 2016

Flash Flood Watch 4, NWS Houston/Galveston, TX

May 16, 20166 counties in Texas

NWS Houston/Galveston, TX issued this flash flood watch at May 16, 2016, 4:02 AM CDT for 6 counties in Texas. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
May 16, 2016, 4:02 AM CDT (09:02 UTC)
Expired
May 16, 2016, 9:27 AM CDT
In force
5 hr
Issued by
NWS Houston/Galveston, TX
Flood severity
None

Counties Brazoria County, TX, Fort Bend County, TX, Galveston County, TX, Jackson County, TX, Matagorda County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 78 km from the middle of the area, began a volume at 09:04 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 00:00Z, 9.0 hours before the alert went out and 219 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, Corpus Christi, TX at 00:00Z on 2016-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 115 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, Corpus Christi, TX at 00:00Z on 2016-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 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
115 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
894 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 10:02 PM CDTSmall Craft AdvisoryHGX8 hr
May 16, 3:51 AM CDTAreal Flood AdvisoryHGXJackson, Matagorda114 min
May 16, 5:18 AM CDTSpecial Marine WarningHGX57 min
May 16, 6:04 AM CDTSmall Craft AdvisoryHGX18 hr
May 16, 6:59 AM CDTSpecial Marine WarningHGX61 min
May 16, 8:17 AM CDTSpecial Marine WarningHGX28 min
May 16, 8:54 AM CDTSpecial Marine WarningHGX36 min
May 16, 9:14 AM CDTSpecial Marine WarningHGX61 min
May 16, 11:09 AM CDTSpecial Marine WarningHGX96 min
May 16, 12:40 PM CDTSpecial Marine WarningHGX65 min
May 16, 1:25 PM CDTSpecial Weather StatementHGXGalveston35 min
May 16, 1:32 PM CDTSpecial Marine WarningHGX58 min
May 16, 1:43 PM CDTSpecial Marine WarningHGX47 min
May 16, 2:30 PM CDTSpecial Marine WarningHGX60 min

Nearby

Flash Flood Watches in Texas, 2016Every flash flood watch in 2016

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.