Alert archive / Iowa / Excessive Heat Warnings in 2018
Excessive Heat Warning 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this excessive heat warning at Jun 17, 2018, 3:01 PM CDT for Johnson County, Linn County, Scott County, Iowa; Rock Island County, Illinois. It was in force for 28 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
- Jun 17, 2018, 3:01 PM CDT (20:01 UTC)
- Expired
- Jun 18, 2018, 7:00 PM CDT
- In force
- 28 hr
- Issued by
- NWS Quad Cities, IA
Counties Johnson County, IA, Linn County, IA, Scott County, IA, Rock Island County, IL
The radar
The Quad Cities radar (KDVN), 44 km from the middle of the area, began a volume at 20:02 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.0 hours before the alert went out and 392 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
- 1403 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1190 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 157 m²/s²
- 0-3 km storm-relative helicity
- 122 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 Jun 16, 6:16 PM CDT, 20 hours 45 minutes earlier.
Area forecast discussion, Jun 16, 6:16 PM CDT, 20 hours 45 minutes before
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</html>The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 3:34 PM CDT | Special Weather Statement | DVN | Bureau | 41 min |
Nearby
Excessive Heat Warnings in Iowa, 2018Excessive Heat Warnings in Illinois, 2018Every excessive heat warning in 2018
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.