Alert archive / Texas / Areal Flood Advisories in 2017

Areal Flood Advisory 21, NWS Amarillo, TX

July 16, 20174 counties in Texas

NWS Amarillo, TX issued this areal flood advisory at Jul 16, 2017, 4:25 PM CDT for 4 counties in Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 16, 2017, 4:25 PM CDT (21:25 UTC)
Expired
Jul 16, 2017, 7:30 PM CDT
In force
3 hr
Issued by
NWS Amarillo, TX
Area
Storm-based polygon

Counties Armstrong County, TX, Carson County, TX, Potter County, TX, Randall County, TX

The radar

The Amarillo radar (KAMA), 9 km from the middle of the area, began a volume at 21:27 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.4 hours before the alert went out and 8 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, Amarillo Airport, TX at 12:00Z on 2017-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 228 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, Amarillo Airport, TX at 12:00Z on 2017-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
228 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
1178 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
-16 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 3:29 PM CDTSpecial Weather StatementAMARandall31 min
Jul 16, 3:48 PM CDTSpecial Weather StatementAMAPotter27 min
Jul 16, 3:57 PM CDTAreal Flood AdvisoryAMAPotter2 hr
Jul 16, 4:15 PM CDTSpecial Weather StatementAMAPotter30 min
Jul 16, 5:33 PM CDTSpecial Weather StatementAMAMoore27 min
Jul 16, 5:37 PM CDTSpecial Weather StatementAMAOchiltree38 min
Jul 16, 5:58 PM CDTSpecial Weather StatementAMAMoore32 min
Jul 16, 6:05 PM CDTSpecial Weather StatementAMAArmstrong25 min
Jul 16, 6:22 PM CDTSpecial Weather StatementAMAOchiltree53 min
Jul 16, 4:20 PM CDTSpecial Weather StatementAMATexas25 min

Nearby

Areal Flood Advisories in Texas, 2017Every areal flood advisory 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.