Alert archive / Iowa / Flash Flood Warnings in 2024

Flash Flood Warning 35, NWS Omaha, NE

July 7, 2024Pottawattamie County, Iowa

NWS Omaha, NE issued this flash flood warning at Jul 7, 2024, 7:06 PM CDT for Pottawattamie County, Iowa. It was in force for 3 hr. 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 7, 2024, 7:06 PM CDT (00:06 UTC)
Expired: Jul 7, 2024, 10:15 PM CDT
In force: 3 hr
Issued by: NWS Omaha, NE
Area: Storm-based polygon
Flood severity: None

County Pottawattamie County, IA

The radar

The Omaha radar (KOAX), 69 km from the middle of the area, began a volume at 00:08 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.

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jul 7, 6:45 PM CDT, 21 minutes earlier.

Area forecast discussion, Jul 7, 6:45 PM CDT, 21 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 7, 6:42 PM CDT, 24 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, Jul 7, 5:37 PM CDT, 1 hour 29 minutes before

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
537 PM CDT Sun Jul 7 2024

NEZ030-072245-
Boone NE-
537 PM CDT Sun Jul 7 2024

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL BOONE COUNTY
THROUGH 545 PM CDT...

At 537 PM CDT, Doppler radar was tracking a strong thunderstorm 3
miles southeast of Cedar Rapids, or 11 miles south of Albion, moving
east at 40 mph.

HAZARD...Wind gusts up to 40 mph and nickel 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...
  Cedar Rapids.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4161 9814 4154 9800 4151 9801 4151 9804
      4150 9804 4150 9809 4148 9810 4148 9823
TIME...MOT...LOC 2237Z 287DEG 33KT 4153 9808

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

DeWald

Special weather statement, Jul 7, 6:06 PM CDT, 1 hour before

Special Weather Statement
National Weather Service Omaha/Valley Nebraska
606 PM CDT Sun Jul 7 2024

IAZ069-072345-
Pottawattamie IA-
606 PM CDT Sun Jul 7 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN POTTAWATTAMIE
COUNTY THROUGH 645 PM CDT...

At 606 PM CDT, Doppler radar was tracking a strong thunderstorm over
Eppley Airfield, or 4 miles northeast of Omaha. This thunderstorm was
nearly stationary.

HAZARD...Wind gusts up to 40 mph and half inch 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...
  Northeastern Omaha, northern Council Bluffs, Carter Lake,
  Underwood, Neola, Crescent, McClelland, Weston, Hitchcock Nature
  Center, Arrowhead Park, and Narrows River Park.

This includes the following highways...
 Interstate 29 between mile markers 52 and 63.
 Interstate 80 in Iowa between mile markers 11 and 23.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4138 9555 4123 9591 4130 9593 4130 9590
      4128 9591 4128 9589 4130 9587 4132 9589
      4132 9592 4135 9596 4137 9593 4139 9594
      4151 9568 4150 9563
TIME...MOT...LOC 2306Z 126DEG 2KT 4132 9590

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Nicolaisen

Local storm report, Jul 7, 6:17 PM CDT, 49 minutes before

Preliminary Local Storm Report
National Weather Service Omaha/Valley NE
617 PM CDT Sun Jul 7 2024

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

0615 PM     Hail             Crescent                41.36N 95.86W
07/07/2024  M0.75 Inch       Pottawattamie      IA   Public

            Report from mPING: Dime (0.75 in.).

&&

Local storm report, Jul 7, 6:31 PM CDT, 35 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 7, 6:57 PM CDT, 9 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 7, 6:59 PM CDT, 7 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 7, 7:16 PM CDT	Special Weather Statement	OAX	Colfax	29 min
Jul 7, 7:59 PM CDT	Areal Flood Advisory	OAX	Shelby	3 hr
Jul 7, 9:28 PM CDT	Special Weather Statement	OAX	Fremont	17 min

Nearby

Flash Flood Warnings in Iowa, 2024 Every flash flood 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; radar from the NEXRAD Level II archive.