Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 224, NWS Omaha, NE

July 13, 2018Gage County, Pawnee County, Richardson County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jul 13, 2018, 4:52 PM CDT for Gage County, Pawnee County, Richardson County, Nebraska. It was in force for 38 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: Jul 13, 2018, 4:52 PM CDT (21:52 UTC)
Expired: Jul 13, 2018, 5:30 PM CDT
In force: 38 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Gage County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 128 km from the middle of the area, began a volume at 21:55 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

Omaha, NE (KOAX), launched 12:00Z, 9.9 hours before the alert went out and 128 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: 747 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 1194 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: -57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.6

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 Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 13, 4:50 PM CDT, 2 minutes earlier.

Area forecast discussion, Jul 13, 4:50 PM CDT, 2 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, Jul 13, 10:58 AM CDT, 5 hours 54 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
1058 AM CDT Fri Jul 13 2018

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-140600-
Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont-
Page-Knox-Cedar-Thurston-Antelope-Pierce-Wayne-Boone-Madison-
Stanton-Cuming-Burt-Platte-Colfax-Dodge-Washington-Butler-
Saunders-Douglas-Sarpy-Seward-Lancaster-Cass-Otoe-Saline-
Jefferson-Gage-Johnson-Nemaha-Pawnee-Richardson-
1058 AM CDT Fri Jul 13 2018

This Hazardous Weather Outlook is for portions of southwest
Iowa...west central Iowa...east central Nebraska...northeast
Nebraska and southeast Nebraska.

.DAY ONE...Today and Tonight

Scattered thunderstorms will continue to affect the region this
morning with moderate to locally heavy rainfall rates. The
flooding risk through early afternoon should be limited by
progressive storm motions.

More organized thunderstorm activity is expected late this
afternoon and evening as frontal boundary settles in over
southeast Nebraska. With ample moisture in place, the risk for
flash flooding is elevated, and a Flash Flood Watch remains in
place for the region through early Saturday. Rainfall totals of 1
to 3 inches, or more, are possible through Saturday morning. Any
severe risk with the storms this evening should be limited to a
localized downburst or marginally severe hail.

Minor flooding will continue on the Missouri River from Nebraska
City downstream to Rulo.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Thunderstorms remain likely into Saturday morning, with heavy
rainfall possible. Then more thunderstorms could show themselves
on Sunday as another weak front traverses the region, but severe
storms are not expected. The next chance for storms returns to the
forecast Wednesday and Thursday.

Minor flooding should continue along the Missouri River from
Nebraska City downstream to Rulo.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is unlikely today and tonight, but reports of
significant activity are still appreciated.

Albright

In the hours before

Special weather statement, Jul 13, 3:11 PM CDT, 1 hour 41 minutes before

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
311 PM CDT FRI JUL 13 2018

IAZ079-080-090-091-132045-
Mills IA-Page IA-Fremont IA-Montgomery IA-
311 PM CDT FRI JUL 13 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN FREMONT...
MONTGOMERY...SOUTHEASTERN MILLS AND NORTHWESTERN PAGE COUNTIES UNTIL
345 PM CDT...

At 311 PM CDT, Doppler radar was tracking a strong thunderstorm 6
miles west of Essex, or 29 miles north of Tarkio, moving northeast at
25 mph.

Dime size hail and wind gusts up to 50 mph will be possible with this
storm.

Locations impacted include...
Red Oak, Villisca, Essex, Stanton, Imogene, Coburg, Pierce Recreation
Area and Viking Lake State Park.

LAT...LON 4077 9543 4091 9552 4114 9514 4090 9497
TIME...MOT...LOC 2011Z 239DEG 23KT 4087 9542

MILLER

Local storm report, Jul 13, 3:15 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
315 PM CDT FRI JUL 13 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0314 PM     HEAVY RAIN       6 SW THURMAN            40.75N 95.81W
07/13/2018  M1.50 INCH       FREMONT            IA   TRAINED SPOTTER

            SPOTTER REPORTS OF 1.50 INCHES OF RAIN IN 45
            MINUTES IN PERCIVAL.

&&

ALBRIGHT

Special weather statement, Jul 13, 3:34 PM CDT, 1 hour 18 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>

Local storm report, Jul 13, 4:10 PM CDT, 42 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>

Special weather statement, Jul 13, 4:13 PM CDT, 39 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>

Special weather statement, Jul 13, 4:40 PM CDT, 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>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 3:53 AM CDT	Flash Flood Watch	OAX	Butler, Cass, Dodge, Douglas, Gage, Jefferson and 11 more	17 hr
Jul 13, 10:05 AM CDT	Areal Flood Advisory	OAX	Cedar, Knox	8 hr
Jul 13, 3:19 PM CDT	Areal Flood Advisory	OAX	Richardson	3 hr
Jul 13, 4:40 PM CDT	Special Weather Statement	OAX	Nemaha	20 min
Jul 13, 4:46 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Pawnee, Richardson	29 min
Jul 13, 5:22 PM CDT	Special Weather Statement	OAX	Gage, Johnson, Pawnee	23 min
Jul 13, 10:47 AM CDT	Special Weather Statement	OAX	Crawford	43 min
Jul 13, 11:32 AM CDT	Special Weather Statement	OAX	Shelby	43 min
Jul 13, 2:36 PM CDT	Special Weather Statement	OAX	Fremont, Montgomery	24 min
Jul 13, 2:53 PM CDT	Special Weather Statement	OAX	Fremont, Mills	37 min
Jul 13, 3:11 PM CDT	Special Weather Statement	OAX	Montgomery	34 min
Jul 13, 3:34 PM CDT	Special Weather Statement	OAX	Montgomery, Page	41 min
Jul 13, 4:13 PM CDT	Special Weather Statement	OAX	Page	17 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018 Every severe thunderstorm warning in 2018

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.