Alert archive / Iowa / Heat Advisories in 2018
Heat Advisory 8, NWS Des Moines, IA
NWS Des Moines, IA issued this heat advisory at Jul 10, 2018, 3:30 PM CDT for 26 counties in Iowa. It took effect at Jul 11, 2018, 1:00 PM CDT. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Jul 10, 2018, 3:30 PM CDT (20:30 UTC)
- In effect from
- Jul 11, 2018, 1:00 PM CDT
- Expired
- Jul 12, 2018, 8:00 PM CDT
- In force
- 31 hr
- Issued by
- NWS Des Moines, IA
All 26 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Emmet County, IA, Greene County, IA, Guthrie County, IA, Humboldt County, IA, Kossuth County, IA, Madison County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Ringgold County, IA, Sac County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Webster County, IA
The radar
The Des Moines radar (KDMX), 57 km from the middle of the area, began a volume at 20:33 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, 8.5 hours before the alert went out and 174 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
- 59 J/kg
- Mixed-layer CIN
- -283 J/kg
- Mixed-layer LCL
- 1766 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Des Moines, IA wrote its last area forecast discussion before this heat advisory went out at Jul 10, 12:54 PM CDT, 2 hours 36 minutes earlier.
Area forecast discussion, Jul 10, 12:54 PM CDT, 2 hours 36 minutes before
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</html>Hazardous weather outlook, Jul 10, 9:59 AM CDT, 5 hours 31 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 959 AM CDT Tue Jul 10 2018 IAZ004>007-015>017-023-024-111500- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt- 959 AM CDT Tue Jul 10 2018 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight Thunderstorms will track through north central Iowa this morning and into early afternoon. Severe weather threat is low, but small hail and gusty winds are possible. River Flood Warnings are in effect for parts of the Des Moines River basin. Please refer to the National Weather Service website at weather.gov/desmoines for further details. .DAYS TWO THROUGH SEVEN...Wednesday through Monday River Flood Warnings will remain in effect for parts of the Des Moines River basin likely into the first part of this weekend. Please refer to the National Weather Service website at weather.gov/desmoines for further details. Thunderstorm chances will increase Thursday into Friday lingering into this weekend. There is a risk of strong to severe storms over northern Iowa later Thursday with the main threats being damaging wind gusts, locally heavy rainfall, and large hail. The risk for locally heavy rain will remain possible on Friday. .SPOTTER INFORMATION STATEMENT... Spotters activation is not needed at this time. IAZ025>028-033>039-044>050-057>062-070>075-081>086-092>097-111500- Wright-Franklin-Butler-Bremer-Sac-Calhoun-Webster-Hamilton-Hardin- Grundy-Black Hawk-Crawford-Carroll-Greene-Boone-Story-Marshall- Tama-Audubon-Guthrie-Dallas-Polk-Jasper-Poweshiek-Cass-Adair- Madison-Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-Monroe- Wapello-Taylor-Ringgold-Decatur-Wayne-Appanoose-Davis- 959 AM CDT Tue Jul 10 2018 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Today and tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorm chances will increase Thursday into Friday lingering into this weekend. There is a risk of strong to severe storms over northern Iowa later Thursday with the main threats being damaging wind gusts, locally heavy rainfall, and large hail. The risk for locally heavy rain will remain possible on Friday. .SPOTTER INFORMATION STATEMENT... Spotters activation is not needed at this time.
In the hours before
Local storm report, Jul 10, 12:18 PM CDT, 3 hours 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1218 PM CDT TUE JUL 10 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1150 AM TSTM WND DMG LAURENS 42.85N 94.85W
07/10/2018 POCAHONTAS IA PUBLIC
SEVERAL REPORTS OF 50-60 MPH WIND AND TREE DAMAGE. TIME
ESTIMATED BY RADAR. VIA MPING.
&&
BSSThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 11:07 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 38 min |
| Jul 10, 11:44 AM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 46 min |
| Jul 10, 12:31 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas | 44 min |
Nearby
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.