Alert archive / Iowa / Areal Flood Warnings in 2018
Areal Flood Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this areal flood warning at Oct 7, 2018, 7:34 PM CDT for Johnson County, Iowa. It was in force for 18 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
- Oct 7, 2018, 7:34 PM CDT (00:34 UTC)
- Expired
- Oct 8, 2018, 1:30 PM CDT
- In force
- 18 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Flood severity
- None
County Johnson County, IA
The radar
The Quad Cities radar (KDVN), 84 km from the middle of the area, began a volume at 00:33 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
Minneapolis, MN (KMPX), launched 00:00Z, 0.6 hours before the alert went out and 389 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
- 5 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 446 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 129 m²/s²
- 0-3 km storm-relative helicity
- 246 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood 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 areal flood warning went out at Oct 7, 6:56 PM CDT, 38 minutes earlier.
Area forecast discussion, Oct 7, 6:56 PM CDT, 38 minutes before
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</html>Hazardous weather outlook, Oct 7, 3:14 PM CDT, 4 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 314 PM CDT Sun Oct 7 2018 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-082015- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 314 PM CDT Sun Oct 7 2018 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...THIS AFTERNOON AND TONIGHT Soils remain completely saturated and unable to absorb heavy rainfall in the entire outlook area. Rain and thunderstorms are possible over the entire area this afternoon and tonight. Heavy rains are most likely this afternoon and tonight, along and east of the Mississippi River. There is now a flash flood watch in effect through mid morning Monday for locations in extreme eastern an southeastern Iowa, northeast Missouri, and all of west central and northwest Illinois. Warm moist air aloft will allow for thunderstorms to bring heavy rainfall, with rains tonight possibly between 1 and 3 inches. This rain will could lead to flash flooding and increased river flooding. Area rivers are experiencing flooding. Please see the latest Flood Statements and Flood Warnings for details. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A flash flood watch will continue for portions of the area through 10 AM Monday morning. There are periodic chances for showers and thunderstorms through the middle of next week. The primary threat is expected to be heavy rainfall, which could lead to flash flooding and aggravate ongoing river flooding. However, a few severe thunderstorms are also possible Tuesday night, mainly west of the Mississippi River. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated this afternoon or tonight. ERVIN
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 7, 8:47 PM CDT | River Flood Warning | DVN | Des Moines, Henry, Lee | 10 days |
| Oct 7, 9:16 PM CDT | River Flood Watch | DVN | Clinton, Scott | 15 hr |
| Oct 8, 2:30 AM CDT | Special Weather Statement | DVN | Henry, Jefferson, Keokuk, Washington | 60 min |
| Oct 8, 3:34 AM CDT | Special Weather Statement | DVN | Cedar, Iowa, Johnson, Keokuk, Muscatine, Washington | 56 min |
| Oct 8, 4:29 AM CDT | Special Weather Statement | DVN | Benton, Cedar, Iowa, Johnson, Jones, Linn | 61 min |
| Oct 8, 9:16 AM CDT | River Flood Warning | DVN | Benton, Linn | 6 days |
| Oct 8, 9:16 AM CDT | River Flood Warning | DVN | Cedar, Johnson, Linn | 9 days |
| Oct 8, 9:16 AM CDT | River Flood Warning | DVN | Johnson, Washington | 49 hr |
| Oct 8, 10:58 AM CDT | River Flood Warning | DVN | Lee | 6 days |
| Oct 8, 11:01 AM CDT | River Flood Watch | DVN | Jackson | 5 hr |
| Oct 8, 11:49 AM CDT | River Flood Warning | DVN | Clinton | 5 days |
| Oct 8, 11:49 AM CDT | River Flood Warning | DVN | Clinton, Scott | 17 days |
| Oct 8, 11:49 AM CDT | River Flood Warning | DVN | Scott | 6 days |
| Oct 8, 3:18 PM CDT | Special Weather Statement | DVN | Des Moines, Henry, Lee, Louisa, Muscatine | 87 min |
| Oct 8, 3:36 PM CDT | River Flood Warning | DVN | Jackson | 5 days |
| Oct 7, 8:26 PM CDT | River Flood Warning | DVN | Hancock, McDonough | 24 hr |
| Oct 8, 12:20 AM CDT | Special Weather Statement | DVN | McDonough | 85 min |
Nearby
Areal Flood Warnings in Iowa, 2018Every areal flood 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.