Alert archive / Oklahoma / Flash Flood Warnings in 2019

Flash Flood Warning 1, NWS Norman, OK

April 17, 20194 counties in Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 17, 2019, 6:52 PM CDT for 4 counties in Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 17, 2019, 6:52 PM CDT (23:52 UTC)
Expired: Apr 17, 2019, 9:45 PM CDT
In force: 3 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Alfalfa County, OK, Harper County, OK, Woods County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 81 km from the middle of the area, began a volume at 23:56 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 12:00Z, 11.9 hours before the alert went out and 144 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2546 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: 5 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 warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this flash flood warning went out at Apr 17, 6:19 PM CDT, 33 minutes earlier.

Area forecast discussion, Apr 17, 6:19 PM CDT, 33 minutes before

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Hazardous weather outlook, Apr 17, 6:06 PM CDT, 46 minutes before

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In the hours before

Local storm report, Apr 17, 5:45 PM CDT, 1 hour 7 minutes before

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Special weather statement, Apr 17, 6:27 PM CDT, 25 minutes before

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Local storm report, Apr 17, 6:30 PM CDT, 22 minutes before

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Local storm report, Apr 17, 6:39 PM CDT, 13 minutes before

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Local storm report, Apr 17, 6:42 PM CDT, 10 minutes before

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Special weather statement, Apr 17, 6:42 PM CDT, 10 minutes before

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The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 17, 3:11 PM CDT	Special Weather Statement	OUN	Roger Mills	34 min
Apr 17, 3:25 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	50 min
Apr 17, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	39 min
Apr 17, 4:31 PM CDT	Special Weather Statement	OUN	Ellis	29 min
Apr 17, 4:39 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	51 min
Apr 17, 4:43 PM CDT	Severe Thunderstorm Warning	OUN	Ellis	47 min
Apr 17, 4:49 PM CDT	Tornado Warning	OUN	Ellis	41 min
Apr 17, 5:05 PM CDT	Areal Flood Advisory	OUN	Ellis, Harper, Woods, Woodward	3 hr
Apr 17, 5:24 PM CDT	Tornado Warning	OUN	Ellis	36 min
Apr 17, 5:25 PM CDT	Special Weather Statement	OUN	Beckham	35 min
Apr 17, 5:27 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	48 min
Apr 17, 5:31 PM CDT	Severe Thunderstorm Warning	OUN	Beckham	44 min
Apr 17, 5:32 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	43 min
Apr 17, 5:34 PM CDT	Tornado Warning	OUN	Custer, Roger Mills	16 min
Apr 17, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper	41 min
Apr 17, 6:07 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	38 min
Apr 17, 6:08 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	52 min
Apr 17, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	48 min
Apr 17, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Harper, Woods, Woodward	46 min
Apr 17, 6:21 PM CDT	Areal Flood Advisory	OUN	Alfalfa, Harper, Woods, Woodward	114 min
Apr 17, 6:27 PM CDT	Special Weather Statement	OUN	Woods	33 min
Apr 17, 6:42 PM CDT	Special Weather Statement	OUN	Woodward	33 min
Apr 17, 6:56 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Custer, Dewey, Major, Woodward	49 min
Apr 17, 6:40 PM CDT	Severe Thunderstorm Warning	OUN	Clay	50 min

Nearby

Flash Flood Warnings in Oklahoma, 2019 Every flash flood warning in 2019

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.