Alert archive / Nebraska / Areal Flood Advisories in 2017

Areal Flood Advisory 13, NWS North Platte, NE

July 29, 2017Lincoln County, Nebraska

NWS North Platte, NE issued this areal flood advisory at Jul 29, 2017, 12:47 AM CDT for Lincoln County, Nebraska. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2017, 12:47 AM CDT (05:47 UTC)
Expired: Jul 29, 2017, 3:45 AM CDT
In force: 3 hr
Issued by: NWS North Platte, NE
Area: Storm-based polygon

County Lincoln County, NE

The radar

The North Platte radar (KLNX), 102 km from the middle of the area, began a volume at 05:48 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, 5.8 hours before the alert went out and 15 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: 533 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.5

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 Jul 28, 11:52 PM CDT, 55 minutes earlier.

Area forecast discussion, Jul 28, 11:52 PM CDT, 55 minutes before

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Hazardous weather outlook, Jul 28, 3:29 PM CDT, 9 hours 18 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service North Platte NE
329 PM CDT Fri Jul 28 2017

NEZ004>010-022>029-035>038-056>059-069>071-094-292030-
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-
329 PM CDT Fri Jul 28 2017 /229 PM MDT Fri Jul 28 2017/

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

.DAY ONE...TONIGHT.

There is a threat for isolated strong to severe thunderstorms
this afternoon and evening west of a line from Nenzel to Seneca
to North Platte to Wellfleet. Large hail and damaging winds are
the main hazards, as well as locally heavy rainfall.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

There is a threat for additional isolated strong to severe
thunderstorms Saturday afternoon through Saturday night along and
west of a line from Stockville to Anselmo to Bassett. Large hail
and damaging winds are the main hazards. Locally heavy rainfall
will be possible Saturday night also.

While thunderstorms are possible Sunday and beyond at times,
confidence and the overall threat for widespread severe
thunderstorms is low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

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

ET

In the hours before

Local storm report, Jul 28, 11:09 PM CDT, 1 hour 38 minutes before

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Local storm report, Jul 28, 11:12 PM CDT, 1 hour 35 minutes before

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Local storm report, Jul 28, 11:21 PM CDT, 1 hour 26 minutes before

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Special weather statement, Jul 28, 11:25 PM CDT, 1 hour 22 minutes before

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Local storm report, Jul 28, 11:29 PM CDT, 1 hour 18 minutes before

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Special weather statement, Jul 28, 11:35 PM CDT, 1 hour 12 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
Jul 28, 9:30 PM CDT	Special Weather Statement	LBF	Lincoln	45 min
Jul 28, 9:34 PM CDT	Special Weather Statement	LBF	Garden	41 min
Jul 28, 9:35 PM CDT	Special Weather Statement	LBF	Arthur	40 min
Jul 28, 10:01 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	44 min
Jul 28, 10:06 PM CDT	Special Weather Statement	LBF	Keith	39 min
Jul 28, 10:12 PM CDT	Special Weather Statement	LBF	Deuel	48 min
Jul 28, 10:29 PM CDT	Special Weather Statement	LBF	Lincoln	46 min
Jul 28, 10:41 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln	49 min
Jul 28, 10:46 PM CDT	Special Weather Statement	LBF	Cherry	44 min
Jul 28, 11:25 PM CDT	Special Weather Statement	LBF	Frontier	50 min
Jul 28, 11:35 PM CDT	Special Weather Statement	LBF	Hooker, Thomas	40 min
Jul 29, 6:30 PM CDT	Special Weather Statement	LBF	Arthur	75 min

Nearby

Areal Flood Advisories in Nebraska, 2017 Every areal flood advisory in 2017

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.