Alert archive / Iowa / Heat Advisories in 2017

Heat Advisory 2, NWS Quad Cities, IA

July 10, 201711 counties in Iowa; 5 counties in Illinois; Clark County, Scotland County, Missouri

NWS Quad Cities, IA issued this heat advisory at Jul 10, 2017, 2:20 PM CDT for 11 counties in Iowa; 5 counties in Illinois; Clark County, Scotland County, Missouri. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jul 10, 2017, 2:20 PM CDT (19:20 UTC)
Expired: Jul 10, 2017, 7:00 PM CDT
In force: 5 hr
Issued by: NWS Quad Cities, IA

Counties 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, Van Buren County, IA, Washington County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Mercer County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 101 km from the middle of the area, began a volume at 19:21 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

Davenport, (KDVN), launched 12:00Z, 7.3 hours before the alert went out and 106 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: 3 J/kg
Mixed-layer CIN: -488 J/kg
Mixed-layer LCL: 1825 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 221 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

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 Quad Cities, IA wrote its last area forecast discussion before this heat advisory went out at Jul 10, 12:54 PM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jul 10, 12:54 PM CDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jul 10, 5:31 AM CDT, 8 hours 49 minutes before

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In the hours before

Local storm report, Jul 10, 10:32 AM CDT, 3 hours 48 minutes before

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Local storm report, Jul 10, 10:45 AM CDT, 3 hours 35 minutes before

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Local storm report, Jul 10, 10:53 AM CDT, 3 hours 27 minutes before

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Local storm report, Jul 10, 11:21 AM CDT, 2 hours 59 minutes before

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Local storm report, Jul 10, 11:36 AM CDT, 2 hours 44 minutes before

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Special weather statement, Jul 10, 12:44 PM CDT, 1 hour 36 minutes before

Special Weather Statement
National Weather Service Quad Cities IA IL
1244 PM CDT Mon Jul 10 2017

IAZ051-052-063>065-067-068-076>078-087>089-098-099-ILZ015>018-
024>026-034-035-MOZ009-010-101945-
Benton-Linn-Iowa-Johnson-Cedar-Muscatine-Scott-Keokuk-Washington-
Louisa-Jefferson-Henry IA-Des Moines-Van Buren-Lee-Rock Island-
Henry IL-Bureau-Putnam-Mercer-Henderson-Warren-Hancock-McDonough-
Scotland-Clark-
Including the cities of Vinton, Cedar Rapids, Marengo, Iowa City,
Tipton, Muscatine, Davenport, Bettendorf, Sigourney, Washington,
Wapello, Fairfield, Mount Pleasant, Burlington, Keosauqua,
Fort Madison, Moline, Rock Island, Geneseo, Princeton, Hennepin,
Aledo, Oquawka, Monmouth, Carthage, Macomb, Memphis, and Kahoka
1244 PM CDT Mon Jul 10 2017

...Very 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 between 95 and 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 10, 2:07 AM CDT	Special Weather Statement	DVN	Delaware, Dubuque	53 min
Jul 10, 2:42 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Dubuque, Jackson, Jones	50 min
Jul 10, 3:52 AM CDT	Special Weather Statement	DVN	Scott	53 min
Jul 10, 4:32 AM CDT	Special Weather Statement	DVN	Des Moines, Henry, Louisa, Muscatine, Washington	58 min
Jul 10, 4:48 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	42 min
Jul 10, 5:15 AM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Louisa, Washington	27 min
Jul 10, 4:41 PM CDT	Special Weather Statement	DVN	Scott	64 min
Jul 10, 6:05 PM CDT	Special Weather Statement	DVN	Lee	40 min
Jul 10, 6:38 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee	67 min
Jul 10, 5:21 AM CDT	Severe Thunderstorm Warning	DVN	Hancock, Henderson, McDonough, Warren	54 min
Jul 10, 6:11 AM CDT	Special Weather Statement	DVN	Putnam	34 min
Jul 10, 7:25 AM CDT	Special Weather Statement	DVN	Hancock, McDonough	65 min
Jul 10, 6:10 PM CDT	Special Weather Statement	DVN	McDonough	35 min

Nearby

Heat Advisories in Iowa, 2017 Heat Advisories in Illinois, 2017 Heat Advisories in Missouri, 2017 Every heat advisory 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.