Alert archive / Nebraska / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 343, NWS North Platte, NE

September 21, 2023Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Sep 21, 2023, 12:39 PM MDT for Cherry County, Nebraska. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Sep 21, 2023, 12:39 PM MDT (18:39 UTC)
Expired: Sep 21, 2023, 1:30 PM MDT
In force: 51 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Cherry County, NE

The radar

The North Platte radar (KLNX), 79 km from the middle of the area, began a volume at 18:42 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, 6.7 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: 912 J/kg
Mixed-layer CIN: -259 J/kg
Mixed-layer LCL: 1393 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Sep 21, 11:27 AM MDT, 1 hour 12 minutes earlier.

Area forecast discussion, Sep 21, 11:27 AM MDT, 1 hour 12 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Sep 21, 9:26 AM MDT, 3 hours 13 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

In the hours before

Special weather statement, Sep 21, 10:16 AM MDT, 2 hours 23 minutes before

Special Weather Statement
National Weather Service North Platte NE
1116 AM CDT Thu Sep 21 2023

NEZ006-007-211645-
Keya Paha NE-Boyd NE-
1116 AM CDT Thu Sep 21 2023

...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN KEYA PAHA AND WEST
CENTRAL BOYD COUNTIES THROUGH 1145 AM CDT...

At 1116 AM CDT, Doppler radar was tracking a strong thunderstorm 15
miles west of Naper, or 19 miles northeast of Springview, moving
north at 20 mph.

HAZARD...Wind gusts up to 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Nets Peak, Mills, and Brocksburg.

This includes Highway 12 between mile markers 69 and 89.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4284 9928 4288 9952 4300 9950 4300 9918
TIME...MOT...LOC 1616Z 200DEG 19KT 4293 9940

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 21, 1:21 AM MDT	Special Weather Statement	LBF	Rock	24 min
Sep 21, 2:20 AM MDT	Special Weather Statement	LBF	Keya Paha	25 min
Sep 21, 7:21 AM MDT	Areal Flood Advisory	LBF	Boyd, Holt, Keya Paha, Rock	4 hr
Sep 21, 10:16 AM MDT	Special Weather Statement	LBF	Keya Paha	29 min
Sep 21, 1:25 PM MDT	Special Weather Statement	LBF	Cherry	50 min
Sep 21, 1:59 PM MDT	Special Weather Statement	LBF	Cherry	46 min
Sep 21, 2:11 PM MDT	Areal Flood Advisory	LBF	Cherry	3 hr
Sep 21, 2:44 PM MDT	Areal Flood Advisory	LBF	Cherry	3 hr
Sep 21, 3:02 PM MDT	Special Weather Statement	LBF	Lincoln	43 min
Sep 21, 3:08 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Frontier	52 min
Sep 21, 3:10 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Custer, Lincoln	50 min
Sep 21, 3:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Lincoln	47 min
Sep 21, 3:17 PM MDT	Special Weather Statement	LBF	Cherry	43 min
Sep 21, 3:40 PM MDT	Areal Flood Advisory	LBF	Lincoln	5 hr
Sep 21, 3:51 PM MDT	Tornado Warning	LBF	Lincoln	39 min
Sep 21, 3:57 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	20 min
Sep 21, 4:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Custer, Lincoln	19 min
Sep 21, 4:30 PM MDT	Special Weather Statement	LBF	Frontier	45 min
Sep 21, 4:40 PM MDT	Special Weather Statement	LBF	Brown	50 min
Sep 21, 5:15 PM MDT	Special Weather Statement	LBF	Lincoln	30 min
Sep 21, 5:21 PM MDT	Special Weather Statement	LBF	Blaine, Brown, Loup, Rock	39 min
Sep 21, 5:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	LBF	Lincoln	38 min
Sep 21, 5:30 PM MDT	Areal Flood Advisory	LBF	Cherry	90 min
Sep 21, 5:44 PM MDT	Special Weather Statement	LBF	Frontier	61 min
Sep 21, 5:56 PM MDT	Special Weather Statement	LBF	Loup, Rock	64 min
Sep 21, 5:56 PM MDT	Special Weather Statement	LBF	Keith	34 min
Sep 21, 5:57 PM MDT	Areal Flood Advisory	LBF	Frontier	14 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2023 Every severe thunderstorm warning in 2023

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.