Alert archive / Nebraska / Flash Flood Watches in 2018

Flash Flood Watch 1, NWS North Platte, NE

May 28, 20188 counties in Nebraska

NWS North Platte, NE issued this flash flood watch at May 28, 2018, 11:17 AM MDT for 8 counties in Nebraska. It took effect at May 28, 2018, 6:00 PM MDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: May 28, 2018, 11:17 AM MDT (17:17 UTC)
In effect from: May 28, 2018, 6:00 PM MDT
Expired: May 29, 2018, 6:00 AM MDT
In force: 12 hr
Issued by: NWS North Platte, NE
Flood severity: None

Counties Chase County, NE, Deuel County, NE, Frontier County, NE, Garden County, NE, Hayes County, NE, Keith County, NE, Lincoln County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 137 km from the middle of the area, began a volume at 17:16 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 5.3 hours before the alert went out and 78 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: 245 J/kg
Mixed-layer CIN: -336 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 459 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 28, 5:57 AM MDT, 5 hours 20 minutes earlier.

Area forecast discussion, May 28, 5:57 AM MDT, 5 hours 20 minutes before

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Hazardous weather outlook, May 28, 8:13 AM MDT, 3 hours 4 minutes before

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In the hours before

Local storm report, May 28, 9:03 AM MDT, 2 hours 14 minutes before

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Local storm report, May 28, 9:10 AM MDT, 2 hours 7 minutes before

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Local storm report, May 28, 9:21 AM MDT, 1 hour 56 minutes before

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Local storm report, May 28, 9:46 AM MDT, 1 hour 31 minutes before

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Local storm report, May 28, 9:58 AM MDT, 1 hour 19 minutes before

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Local storm report, May 28, 10:25 AM MDT, 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 27, 6:01 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	29 min
May 27, 6:07 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Deuel, Keith, Perkins	38 min
May 27, 6:15 PM MDT	Special Weather Statement	LBF	Cherry	30 min
May 27, 6:26 PM MDT	Special Weather Statement	LBF	Sheridan	49 min
May 27, 6:29 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Deuel, Garden, Keith, Perkins	46 min
May 27, 6:46 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	44 min
May 27, 7:06 PM MDT	Severe Thunderstorm Warning	LBF	Garden	24 min
May 27, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, Perkins	48 min
May 27, 7:43 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Keith, Lincoln, Logan, McPherson	47 min
May 27, 7:58 PM MDT	Special Weather Statement	LBF	Lincoln	47 min
May 27, 8:12 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, Logan, McPherson, Thomas	35 min
May 27, 8:43 PM MDT	Special Weather Statement	LBF	Cherry	47 min
May 28, 2:03 AM MDT	Special Weather Statement	LBF	Logan	42 min
May 28, 8:02 AM MDT	Flash Flood Warning	LBF	Keith, Lincoln, Perkins	4 hr
May 28, 8:14 AM MDT	Areal Flood Advisory	LBF	Hayes, Lincoln	3 hr
May 28, 8:41 AM MDT	Special Weather Statement	LBF	Thomas	49 min
May 28, 9:13 AM MDT	Flash Flood Warning	LBF	Hayes	4 hr

Nearby

Flash Flood Watches in Nebraska, 2018 Every flash flood watch in 2018

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.