Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 340, NWS Omaha, NE

July 10, 2024Fremont County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Jul 10, 2024, 5:59 PM CDT for Fremont County, Iowa. It was in force for 31 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 10, 2024, 5:59 PM CDT (22:59 UTC)
Expired: Jul 10, 2024, 6:30 PM CDT
In force: 31 min
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Fremont County, IA

The radar

The Omaha radar (KOAX), 90 km from the middle of the area, began a volume at 22:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 10, 2:44 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 11.0 hours before the alert went out and 91 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: 690 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1483 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

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 10, 4:01 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jul 10, 4:01 PM CDT, 1 hour 58 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 10, 4:04 PM CDT, 1 hour 55 minutes before

Hazardous Weather Outlook
National Weather Service Omaha/Valley NE
404 PM CDT Wed Jul 10 2024

IAZ043-055-056-069-079-080-090-091-NEZ011-012-015>018-030>034-
042>045-050>053-065>068-078-088>093-111115-
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-
404 PM CDT Wed Jul 10 2024

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

.DAY ONE...Tonight and Thursday

A few strong or severe storms may produce hail and gusty winds
this afternoon and evening. Large hail will be the primary threat.
Storms will taper and end after sunset.

.DAYS TWO THROUGH SEVEN...Thursday night through Wednesday

Hot conditions are likely Saturday through Monday. Heat index
values will likely exceed 100 degrees, and may approach 110
degrees, especially on Sunday and Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected.

In the hours before

Local storm report, Jul 10, 5:39 PM CDT, 20 minutes before

Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
539 PM CDT Wed Jul 10 2024

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

0524 PM     Hail             5 N Sidney              40.82N 95.64W
07/10/2024  M1.00 Inch       Fremont            IA   Emergency Mngr

            Emergency management reported lots of hail
            the size of dimes and nickels with a few
            quarter sized hail stones mixed in.

&&

BD

Local storm report, Jul 10, 5:41 PM CDT, 18 minutes before

Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
541 PM CDT Wed Jul 10 2024

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

0516 PM     Hail             3 E Thurman             40.83N 95.70W
07/10/2024  E0.75 Inch       Fremont            IA   Public

            Report from mPING: Dime (0.75 in.).

&&

BD

Local storm report, Jul 10, 5:49 PM CDT, 10 minutes before

Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
549 PM CDT Wed Jul 10 2024

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

0342 PM     Hail             Coburg                  40.92N 95.27W
07/10/2024  M1.00 Inch       Montgomery         IA   Emergency Mngr

            Emergency management reported quarter sized
            hail in Coburg.

&&

BD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:03 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	27 min
Jul 10, 5:18 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	42 min
Jul 10, 5:30 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Seward	30 min
Jul 10, 5:34 PM CDT	Severe Thunderstorm Warning	OAX	Otoe	26 min
Jul 10, 5:57 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline, Seward	35 min
Jul 10, 6:30 PM CDT	Severe Thunderstorm Warning	OAX	Saline	30 min
Jul 10, 6:48 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Otoe	27 min
Jul 10, 2:20 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	40 min
Jul 10, 2:37 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	53 min
Jul 10, 3:16 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Page	44 min
Jul 10, 3:28 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	32 min
Jul 10, 3:55 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	26 min
Jul 10, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Page	22 min
Jul 10, 5:25 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	18 min
Jul 10, 6:12 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	33 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every severe thunderstorm warning in 2024

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.