Alert archive / Nebraska / Special Weather Statements in 2020

Special Weather Statement, NWS North Platte, NE

April 19, 2020Frontier County, Nebraska

NWS North Platte, NE issued this special weather statement at Apr 19, 2020, 9:12 PM CDT for Frontier County, Nebraska. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 19, 2020, 9:12 PM CDT (02:12 UTC)
Expired
Apr 19, 2020, 9:45 PM CDT
In force
33 min
Issued by
NWS North Platte, NE

County Frontier County, NE

The radar

The Grand Island radar (KUEX), 160 km from the middle of the area, began a volume at 02:13 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.2 hours before the alert went out and 72 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-pSkew-T log-p diagram, N. Platte/Lee Bi, NE at 00:00Z on 2020-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, N. Platte/Lee Bi, NE at 00:00Z on 2020-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2264 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 19, 6:15 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, Apr 19, 6:15 PM CDT, 2 hours 57 minutes before
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Hazardous weather outlook, Apr 19, 3:06 PM CDT, 6 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service North Platte NE
306 PM CDT Sun Apr 19 2020

NEZ004>010-022>029-035>038-056>059-069>071-094-202015-
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-
306 PM CDT Sun Apr 19 2020 /206 PM MDT Sun Apr 19 2020/

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

.DAY ONE...TONIGHT.

Isolated thunderstorms are possible this evening across mainly
southwest Nebraska and the Sandhills. While severe storms are not
expected, storms that form could be capable of small hail, gusty
winds to 50 mph and frequent lightning.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

Warming temperatures and low afternoon humidity approaching 20
percent on Monday will combine with northwest gusts of 20-35 mph,
strongest winds across north central Nebraska. This will promote
elevated fire weather conditions across parts of western Nebraska
Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

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

In the hours before

Special weather statement, Apr 19, 7:34 PM CDT, 1 hour 38 minutes before
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Special weather statement, Apr 19, 8:01 PM CDT, 1 hour 11 minutes before
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Special weather statement, Apr 19, 8:34 PM CDT, 38 minutes before
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Special weather statement, Apr 19, 8:45 PM CDT, 27 minutes before
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Special weather statement, Apr 19, 9:12 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 19, 7:34 PM CDTSpecial Weather StatementLBFBlaine, Hooker, Logan, McPherson, Thomas41 min
Apr 19, 8:01 PM CDTSpecial Weather StatementLBFBlaine, Brown, Lincoln, Logan, Thomas44 min
Apr 19, 8:34 PM CDTSpecial Weather StatementLBFFrontier41 min
Apr 19, 8:45 PM CDTSpecial Weather StatementLBFBlaine, Brown, Custer, Loup, Rock45 min
Apr 19, 9:29 PM CDTSpecial Weather StatementLBFCuster, Garfield, Loup46 min
Apr 20, 3:58 AM CDTRed Flag WarningLBFCuster, Frontier, Garfield, Holt, Lincoln, Loup and 1 more16 hr

Nearby

Special Weather Statements in Nebraska, 2020Every special weather statement 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.