Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 3, NWS Amarillo, TX

May 28, 201514 counties in Texas; Beaver County, Oklahoma

NWS Amarillo, TX issued this flash flood watch at May 28, 2015, 4:04 AM CDT for 14 counties in Texas; Beaver County, Oklahoma. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: May 28, 2015, 4:04 AM CDT (09:04 UTC)
Expired: May 28, 2015, 8:59 PM CDT
In force: 17 hr
Issued by: NWS Amarillo, TX
Flood severity: None

Counties Beaver County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Lipscomb County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 64 km from the middle of the area, began a volume at 09:07 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

Dodge City, (KDDC), launched 00:00Z, 9.1 hours before the alert went out and 272 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: 1663 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1042 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 421 m²/s²
Significant tornado parameter: 3.6
Supercell composite: 20.2

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 May 28, 3:43 AM CDT, 21 minutes earlier.

Area forecast discussion, May 28, 3:43 AM CDT, 21 minutes before

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Hazardous weather outlook, May 28, 3:53 AM CDT, 11 minutes before

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In the hours before

Local storm report, May 28, 12:03 AM CDT, 4 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
1203 AM CDT THU MAY 28 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1115 PM     HAIL             CANYON                  34.98N 101.92W
05/27/2015  E1.50 INCH       RANDALL            TX   PUBLIC

&&

EVENT NUMBER AMA1500509

CLK

Special weather statement, May 28, 12:07 AM CDT, 3 hours 57 minutes before

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Special weather statement, May 28, 1:12 AM CDT, 2 hours 52 minutes before

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Special weather statement, May 28, 1:52 AM CDT, 2 hours 12 minutes before

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Local storm report, May 28, 2:04 AM CDT, 2 hours before

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Local storm report, May 28, 2:42 AM CDT, 1 hour 22 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
May 27, 7:15 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Ochiltree, Roberts	30 min
May 27, 7:39 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	66 min
May 27, 8:18 PM CDT	Tornado Warning	AMA	Armstrong	57 min
May 27, 8:29 PM CDT	Flash Flood Warning	AMA	Armstrong	3 hr
May 27, 9:14 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	61 min
May 27, 9:51 PM CDT	Tornado Warning	AMA	Randall	24 min
May 27, 9:58 PM CDT	Flash Flood Warning	AMA	Hemphill, Lipscomb	6 hr
May 27, 10:08 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	67 min
May 27, 10:11 PM CDT	Severe Thunderstorm Warning	AMA	Randall	64 min
May 27, 10:29 PM CDT	Flash Flood Warning	AMA	Armstrong, Randall	6 hr
May 27, 10:41 PM CDT	River Flood Warning	AMA	Armstrong	18 hr
May 27, 11:02 PM CDT	Severe Thunderstorm Warning	AMA	Randall	43 min
May 27, 11:08 PM CDT	Flash Flood Warning	AMA	Collingsworth	3 hr
May 27, 11:14 PM CDT	Severe Thunderstorm Warning	AMA	Donley	61 min
May 27, 11:32 PM CDT	Severe Thunderstorm Warning	AMA	Randall	33 min
May 28, 12:03 AM CDT	Flash Flood Warning	AMA	Donley	4 hr
May 28, 12:07 AM CDT	Special Weather Statement	AMA	Randall	23 min
May 28, 1:12 AM CDT	Special Weather Statement	AMA	Randall	33 min
May 28, 1:13 AM CDT	River Flood Warning	AMA	Hemphill	19 hr
May 28, 1:45 AM CDT	Areal Flood Advisory	AMA	Collingsworth	4 hr
May 28, 1:52 AM CDT	Special Weather Statement	AMA	Randall	38 min
May 28, 2:02 AM CDT	Severe Thunderstorm Warning	AMA	Randall	43 min
May 28, 9:27 AM CDT	Special Weather Statement	AMA	Ochiltree	33 min
May 28, 4:10 PM CDT	Special Weather Statement	AMA	Dallam	50 min
May 28, 4:26 PM CDT	Severe Thunderstorm Warning	AMA	Dallam	64 min
May 28, 5:15 PM CDT	Special Weather Statement	AMA	Oldham	45 min
May 28, 5:26 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	64 min
May 28, 6:32 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	58 min
May 28, 6:36 PM CDT	Special Weather Statement	AMA	Sherman	39 min
May 27, 9:44 PM CDT	Areal Flood Advisory	AMA	Beaver	4 hr
May 28, 8:41 AM CDT	Special Weather Statement	AMA	Cimarron	49 min

Nearby

Flash Flood Watches in Texas, 2015 Flash Flood Watches in Oklahoma, 2015 Every 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.