Alert archive / Texas / Flash Flood Watches in 2017

Flash Flood Watch 3, NWS Amarillo, TX

July 29, 201710 counties in Texas; Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this flash flood watch at Jul 29, 2017, 4:21 AM CDT for 10 counties in Texas; Cimarron County, Texas County, Oklahoma. It took effect at Jul 29, 2017, 7:00 AM CDT. It was in force for 46 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2017, 4:21 AM CDT (09:21 UTC)
In effect from: Jul 29, 2017, 7:00 AM CDT
Expired: Jul 31, 2017, 5:12 AM CDT
In force: 46 hr
Issued by: NWS Amarillo, TX
Flood severity: None

Counties Cimarron County, OK, Texas County, OK, Dallam County, TX, Deaf Smith County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 79 km from the middle of the area, began a volume at 09:21 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 00:00Z, 9.4 hours before the alert went out and 79 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 555 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 2302 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Amarillo, TX wrote its last area forecast discussion before this flash flood watch went out at Jul 29, 12:28 AM CDT, 3 hours 53 minutes earlier.

Area forecast discussion, Jul 29, 12:28 AM CDT, 3 hours 53 minutes before

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Hazardous weather outlook, Jul 28, 10:08 PM CDT, 6 hours 13 minutes before

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In the hours before

Special weather statement, Jul 29, 2:02 AM CDT, 2 hours 19 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 3:08 PM CDT	Special Weather Statement	AMA	Moore, Potter	37 min
Jul 29, 3:24 PM CDT	Special Weather Statement	AMA	Randall	66 min
Jul 29, 3:26 PM CDT	Special Weather Statement	AMA	Sherman	64 min
Jul 29, 3:33 PM CDT	Special Weather Statement	AMA	Oldham	57 min
Jul 29, 3:50 PM CDT	Special Weather Statement	AMA	Moore, Potter	70 min
Jul 29, 4:02 PM CDT	Areal Flood Advisory	AMA	Potter	118 min
Jul 29, 4:06 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Potter, Randall	54 min
Jul 29, 4:24 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	66 min
Jul 29, 4:25 PM CDT	Severe Thunderstorm Warning	AMA	Moore, Potter	65 min
Jul 29, 4:39 PM CDT	Severe Thunderstorm Warning	AMA	Carson, Hutchinson, Moore, Potter	51 min
Jul 29, 4:53 PM CDT	Special Weather Statement	AMA	Hartley	67 min
Jul 29, 5:09 PM CDT	Special Weather Statement	AMA	Potter	66 min
Jul 29, 5:24 PM CDT	Areal Flood Advisory	AMA	Armstrong, Randall	3 hr
Jul 29, 5:31 PM CDT	Special Weather Statement	AMA	Armstrong, Carson	59 min
Jul 29, 5:34 PM CDT	Areal Flood Advisory	AMA	Carson, Potter	116 min
Jul 29, 2:02 AM CDT	Special Weather Statement	AMA	Cimarron	28 min
Jul 29, 4:21 AM CDT	Areal Flood Advisory	AMA	Cimarron, Texas	3 hr
Jul 29, 4:24 AM CDT	Special Weather Statement	AMA	Texas	36 min

Nearby

Flash Flood Watches in Texas, 2017 Flash Flood Watches in Oklahoma, 2017 Every 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.