Alert archive / Nebraska / Areal Flood Advisories in 2020

Areal Flood Advisory 21, NWS North Platte, NE

June 18, 2020Cherry County, Nebraska

NWS North Platte, NE issued this areal flood advisory at Jun 18, 2020, 12:14 AM MDT for Cherry County, Nebraska. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 18, 2020, 12:14 AM MDT (06:14 UTC)
Expired: Jun 18, 2020, 3:15 AM MDT
In force: 3 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Cherry County, NE

The radar

The North Platte radar (KLNX), 79 km from the middle of the area, began a volume at 06:15 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 00:00Z, 6.2 hours before the alert went out and 163 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: 1871 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 2589 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory 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 areal flood advisory went out at Jun 17, 11:37 PM MDT, 37 minutes earlier.

Area forecast discussion, Jun 17, 11:37 PM MDT, 37 minutes before

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Hazardous weather outlook, Jun 17, 2:27 PM MDT, 9 hours 47 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
327 PM CDT Wed Jun 17 2020

NEZ004>010-022>029-035>038-056>059-069>071-094-182030-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
327 PM CDT Wed Jun 17 2020 /227 PM MDT Wed Jun 17 2020/

This Hazardous Weather Outlook is for portions of western and
north central Nebraska.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

Isolated to scattered thunderstorms are possible for the late
afternoon and evening hours across much of western and portions of
north central Nebraska. Some storms may become strong to severe
with wind gusts up to 70 mph, hail up to the size of ping pong
balls, and locally heavy rainfall the main concerns. The area of
greatest concern for these threats will be along and west of a
Tryon to Bassett line.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

Near daily thunderstorm chances exist Friday through Sunday. At
this time, the threat for severe weather is low.

.SPOTTER INFORMATION STATEMENT...

Please relay any information about observed severe weather to the
NWS.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

In the hours before

Special weather statement, Jun 17, 9:56 PM MDT, 2 hours 18 minutes before

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Special weather statement, Jun 17, 10:02 PM MDT, 2 hours 12 minutes before

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Special weather statement, Jun 17, 10:49 PM MDT, 1 hour 25 minutes before

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Special weather statement, Jun 17, 11:03 PM MDT, 1 hour 11 minutes before

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Special weather statement, Jun 17, 11:15 PM MDT, 59 minutes before

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Special weather statement, Jun 17, 11:37 PM MDT, 37 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
Jun 17, 6:00 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	45 min
Jun 17, 6:15 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	45 min
Jun 17, 6:23 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Hooker	52 min
Jun 17, 6:36 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	39 min
Jun 17, 7:05 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	40 min
Jun 17, 7:07 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	38 min
Jun 17, 7:13 PM MDT	Special Weather Statement	LBF	Grant	47 min
Jun 17, 7:50 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Hooker	40 min
Jun 17, 8:06 PM MDT	Special Weather Statement	LBF	Cherry	39 min
Jun 17, 8:33 PM MDT	Special Weather Statement	LBF	Keya Paha	12 min
Jun 17, 8:34 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Hooker	41 min
Jun 17, 9:01 PM MDT	Special Weather Statement	LBF	Cherry	44 min
Jun 17, 9:17 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	43 min
Jun 17, 9:22 PM MDT	Special Weather Statement	LBF	Grant	38 min
Jun 17, 9:40 PM MDT	Areal Flood Advisory	LBF	Brown, Cherry, Keya Paha	6 hr
Jun 17, 9:56 PM MDT	Special Weather Statement	LBF	Keya Paha	49 min
Jun 17, 10:02 PM MDT	Special Weather Statement	LBF	Cherry	43 min
Jun 17, 10:18 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	42 min
Jun 17, 10:49 PM MDT	Special Weather Statement	LBF	Keya Paha	26 min
Jun 17, 11:03 PM MDT	Special Weather Statement	LBF	Cherry	12 min
Jun 17, 11:15 PM MDT	Special Weather Statement	LBF	Cherry	15 min
Jun 17, 11:37 PM MDT	Special Weather Statement	LBF	Keya Paha	38 min
Jun 18, 12:21 AM MDT	Special Weather Statement	LBF	Keya Paha	24 min

Nearby

Areal Flood Advisories in Nebraska, 2020 Every areal flood advisory 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.