Alert archive / Iowa / Excessive Heat Warnings in 2017
Excessive Heat Warning 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this excessive heat warning at Jul 18, 2017, 3:08 PM CDT for 13 counties in Iowa; 7 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Jul 19, 2017, 12:00 PM CDT. It was in force for 3 days. 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 18, 2017, 3:08 PM CDT (20:08 UTC)
- In effect from
- Jul 19, 2017, 12:00 PM CDT
- Expired
- Jul 22, 2017, 8:00 PM CDT
- In force
- 3 days
- Issued by
- NWS Quad Cities, IA
All 22 counties
Cedar County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Hancock County, IL, Henderson County, IL, Henry County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 83 km from the middle of the area, began a volume at 20:08 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.
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 8.1 hours before the alert went out and 425 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.
- Mixed-layer CAPE
- 367 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 1063 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this excessive heat warning went out at Jul 18, 12:31 PM CDT, 2 hours 37 minutes earlier.
Area forecast discussion, Jul 18, 12:31 PM CDT, 2 hours 37 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 18, 4:36 AM CDT, 10 hours 32 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 18, 12:53 PM CDT, 2 hours 15 minutes before
Special Weather Statement National Weather Service Quad Cities IA IL 1253 PM CDT Tue Jul 18 2017 IAZ051>053-063>068-076>078-087>089-098-099-ILZ015-016-024>026-034- 035-MOZ009-010-190000- Benton-Linn-Jones-Iowa-Johnson-Cedar-Clinton-Muscatine-Scott- Keokuk-Washington-Louisa-Jefferson-Henry IA-Des Moines-Van Buren- Lee-Rock Island-Henry IL-Mercer-Henderson-Warren-Hancock- McDonough-Scotland-Clark- Including the cities of Vinton, Cedar Rapids, Anamosa, Marengo, Iowa City, Tipton, Clinton, Muscatine, Davenport, Bettendorf, Sigourney, Washington, Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua, Fort Madison, Moline, Rock Island, Geneseo, Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka 1253 PM CDT Tue Jul 18 2017 ...Hot and Humid this Afternoon... High temperatures in the upper 80s to lower 90s combined with dewpoints in the lower to middle 70s will lead to peak heat indices in the upper 90s to around 100 degrees. If spending time outside today, be sure to drink plenty of water and take breaks in the shade. Also, never leave a child or pet unattended in a vehicle. Uttech
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 4:31 PM CDT | Special Weather Statement | DVN | Iowa | 29 min |
| Jul 18, 5:00 PM CDT | Special Weather Statement | DVN | Iowa | 30 min |
| Jul 18, 5:28 PM CDT | Special Weather Statement | DVN | Johnson, Washington | 32 min |
| Jul 18, 5:53 PM CDT | Special Weather Statement | DVN | Cedar, Louisa, Muscatine | 37 min |
| Jul 18, 6:28 PM CDT | Special Weather Statement | DVN | Cedar, Scott | 47 min |
Nearby
Excessive Heat Warnings in Iowa, 2017Excessive Heat Warnings in Illinois, 2017Excessive Heat Warnings in Missouri, 2017Every excessive heat warning in 2017
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.