Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS North Platte, NE

June 23, 2021Keya Paha County, Nebraska

NWS North Platte, NE issued this special weather statement at Jun 23, 2021, 4:51 PM CDT for Keya Paha County, Nebraska. It was in force for 39 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
Jun 23, 2021, 4:51 PM CDT (21:51 UTC)
Expired
Jun 23, 2021, 5:30 PM CDT
In force
39 min
Issued by
NWS North Platte, NE

County Keya Paha County, NE

The radar

The North Platte radar (KLNX), 107 km from the middle of the area, began a volume at 21:51 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, 9.9 hours before the alert went out and 195 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 12:00Z on 2021-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 211 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2021-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
211 J/kg
Mixed-layer CIN
-469 J/kg
Mixed-layer LCL
2679 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
100 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 Jun 23, 2:27 PM CDT, 2 hours 24 minutes earlier.

Area forecast discussion, Jun 23, 2:27 PM CDT, 2 hours 24 minutes before
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Jun 23, 3:51 PM CDT, 1 hour before
Hazardous Weather Outlook
National Weather Service North Platte NE
351 PM CDT Wed Jun 23 2021

NEZ004>010-022>029-035>038-056>059-069>071-094-242100-
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-
351 PM CDT Wed Jun 23 2021 /251 PM MDT Wed Jun 23 2021/

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

.DAY ONE...TONIGHT.

A Heat Advisory is in effect until 8 PM CDT for locations east of
a line from Ogallala to Valentine. Additionally, near critical
fire weather conditions are expected to continue into the evening
in the Panhandle and western Sandhills where humidity could reach
as low as 15%.

There is a chance for thunderstorms across western and north
central Nebraska this evening and overnight. Some storms may be
strong to severe. The strongest storms have the ability to produce
large hail, damaging winds, and frequent lightning.

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

The next chance for thunderstorms is Thursday evening across
western and north central Nebraska. There is a chance that some
storms may turn severe. The strongest storms have the ability to
produce large hail, damaging winds, and frequent lightning.

A few thunderstorms are possible on Friday into Saturday, but
severe weather is not anticipated at this time.

.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 23, 4:51 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service North Platte NE
451 PM CDT Wed Jun 23 2021

NEZ005-006-008-232230-
Brown NE-Eastern Cherry NE-Keya Paha NE-
451 PM CDT Wed Jun 23 2021

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CHERRY...NORTHERN BROWN
AND WESTERN KEYA PAHA COUNTIES UNTIL 530 PM CDT...

At 451 PM CDT, Doppler radar was tracking a strong thunderstorm near
Norden, or 19 miles west of Springview, moving east at 25 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Springview, Norden, Keller Park State Recreation Area, Bobcat State
Wildlife Management Area, Pine Glen State Wildlife Refuge, Antelope
Peak, Meadville and North River Trail.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central Nebraska.

LAT...LON 4275 10026 4293 10023 4294 10017 4298 9997
      4293 9976 4259 9969
TIME...MOT...LOC 2151Z 275DEG 23KT 4283 10014

Taylor

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 5:19 PM CDTSevere Thunderstorm WarningLBFKeya Paha41 min
Jun 23, 5:22 PM CDTSevere Thunderstorm WarningLBFCherry38 min
Jun 23, 5:58 PM CDTSevere Thunderstorm WarningLBFBrown, Keya Paha, Rock47 min
Jun 23, 5:59 PM CDTSevere Thunderstorm WarningLBFBrown, Cherry46 min
Jun 23, 6:05 PM CDTSevere Thunderstorm WarningLBFBoyd, Holt, Keya Paha23 min
Jun 23, 6:45 PM CDTSevere Thunderstorm WarningLBFBrown, Rock17 min

Nearby

Special Weather Statements in Nebraska, 2021Every special weather statement in 2021

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.