Alert archive / Texas / Flash Flood Watches in 2017

Flash Flood Watch 1, NWS Lubbock, TX

July 31, 201716 counties in Texas

NWS Lubbock, TX issued this flash flood watch at Jul 31, 2017, 8:00 AM CDT for 16 counties in Texas. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued
Jul 31, 2017, 8:00 AM CDT (13:00 UTC)
Expired
Aug 1, 2017, 5:20 AM CDT
In force
21 hr
Issued by
NWS Lubbock, TX
Flood severity
None

Counties Bailey County, TX, Briscoe County, TX, Castro County, TX, Cochran County, TX, Crosby County, TX, Floyd County, TX, Garza County, TX, Hale County, TX, Hockley County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Parmer County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 31 km from the middle of the area, began a volume at 13:00 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

Midland Regional, TX (KMAF), launched 12:00Z, 1.0 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.

Skew-T log-pSkew-T log-p diagram, Midland Regional, TX at 12:00Z on 2017-07-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 779 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, Midland Regional, TX at 12:00Z on 2017-07-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.1939Sfc1 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
779 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
1294 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
159 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Lubbock, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 1:47 AM CDTAreal Flood AdvisoryLUBParmer118 min
Jul 31, 4:26 AM CDTAreal Flood AdvisoryLUBHockley, Lubbock2 hr
Jul 31, 11:16 AM CDTAreal Flood AdvisoryLUBLubbock59 min

Nearby

Flash Flood Watches in Texas, 2017Every flash flood watch in 2017

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.