Alert archive / Nebraska / Flash Flood Watches in 2020

Flash Flood Watch 1, NWS North Platte, NE

May 24, 2020Custer County, Nebraska

NWS North Platte, NE issued this flash flood watch at May 24, 2020, 3:12 PM CDT for Custer County, Nebraska. It took effect at May 24, 2020, 7:00 PM CDT. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: May 24, 2020, 3:12 PM CDT (20:12 UTC)
In effect from: May 24, 2020, 7:00 PM CDT
Expired: May 25, 2020, 3:08 PM CDT
In force: 20 hr
Issued by: NWS North Platte, NE
Flood severity: None

County Custer County, NE

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 20:13 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

Omaha, NE (KOAX), launched 12:00Z, 8.2 hours before the alert went out and 280 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: 67 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 994 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 North Platte, NE wrote its last area forecast discussion before this flash flood watch went out at May 24, 3:10 PM CDT, 2 minutes earlier.

Area forecast discussion, May 24, 3:10 PM CDT, 2 minutes before

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Hazardous weather outlook, May 24, 11:22 AM CDT, 3 hours 50 minutes before

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In the hours before

Local storm report, May 24, 1:43 PM CDT, 1 hour 29 minutes before

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Local storm report, May 24, 1:48 PM CDT, 1 hour 24 minutes before

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Local storm report, May 24, 1:52 PM CDT, 1 hour 20 minutes before

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Local storm report, May 24, 1:53 PM CDT, 1 hour 19 minutes before

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Local storm report, May 24, 2:01 PM CDT, 1 hour 11 minutes before

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Local storm report, May 24, 2:20 PM CDT, 52 minutes before

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 7:07 PM CDT	Special Weather Statement	LBF	Sheridan	38 min
May 23, 7:46 PM CDT	Special Weather Statement	LBF	Sheridan	44 min
May 23, 8:04 PM CDT	Severe Thunderstorm Warning	LBF	Deuel, Garden	56 min
May 23, 8:07 PM CDT	Special Weather Statement	LBF	Sheridan	38 min
May 23, 8:17 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	43 min
May 23, 8:42 PM CDT	Special Weather Statement	LBF	Sheridan	18 min
May 23, 8:55 PM CDT	Special Weather Statement	LBF	Sheridan	65 min
May 23, 8:57 PM CDT	Severe Thunderstorm Warning	LBF	Deuel, Garden, Keith, Perkins	63 min
May 23, 9:42 PM CDT	Special Weather Statement	LBF	Custer	48 min
May 23, 9:46 PM CDT	Special Weather Statement	LBF	Arthur, Grant	59 min
May 23, 9:50 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln	55 min
May 23, 9:59 PM CDT	Severe Thunderstorm Warning	LBF	Arthur, Keith	45 min
May 23, 10:12 PM CDT	Special Weather Statement	LBF	Keith	48 min
May 23, 10:32 PM CDT	Special Weather Statement	LBF	Perkins	28 min
May 23, 10:34 PM CDT	Special Weather Statement	LBF	Cherry	56 min
May 23, 10:37 PM CDT	Special Weather Statement	LBF	Hooker, McPherson, Thomas	53 min
May 23, 10:37 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	53 min
May 23, 10:44 PM CDT	Severe Thunderstorm Warning	LBF	Hooker, Keith, Lincoln, McPherson, Perkins, Thomas	46 min
May 23, 11:17 PM CDT	Special Weather Statement	LBF	Blaine	13 min
May 23, 11:17 PM CDT	Tornado Warning	LBF	Custer	43 min
May 23, 11:28 PM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Cherry, Thomas	62 min
May 23, 11:30 PM CDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Logan, Loup	60 min
May 23, 11:58 PM CDT	Severe Thunderstorm Warning	LBF	Custer	47 min
May 24, 12:12 AM CDT	Severe Thunderstorm Warning	LBF	Wheeler	48 min
May 24, 12:21 AM CDT	Severe Thunderstorm Warning	LBF	Custer	39 min
May 24, 12:23 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Holt, Rock	37 min
May 24, 12:25 AM CDT	Areal Flood Advisory	LBF	Custer	13 hr
May 24, 12:27 AM CDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Loup	33 min
May 24, 12:35 AM CDT	Special Weather Statement	LBF	Keya Paha	25 min
May 24, 12:55 AM CDT	Severe Thunderstorm Warning	LBF	Boyd, Holt, Keya Paha, Rock	65 min
May 24, 12:57 AM CDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Loup, Wheeler	63 min
May 24, 1:17 AM CDT	Special Weather Statement	LBF	Custer	43 min
May 24, 1:56 AM CDT	Severe Thunderstorm Warning	LBF	Holt, Wheeler	34 min

Nearby

Flash Flood Watches in Nebraska, 2020 Every flash flood watch in 2020

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.