Alert archive / Iowa / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 122, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Sep 2, 2018, 3:01 PM CDT for Buchanan County, Delaware County, Iowa. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 2, 2018, 3:01 PM CDT (20:01 UTC)
- Expired
- Sep 2, 2018, 3:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Buchanan County, IA, Delaware County, IA
The radar
The Quad Cities radar (KDVN), 127 km from the middle of the area, began a volume at 20:01 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, 8.0 hours before the alert went out and 131 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
- 20 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1345 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Sep 2, 2:12 PM CDT, 49 minutes earlier.
Area forecast discussion, Sep 2, 2:12 PM CDT, 49 minutes before
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</html>Hazardous weather outlook, Sep 2, 5:38 AM CDT, 9 hours 23 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 538 AM CDT Sun Sep 2 2018 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-031000- 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- 538 AM CDT Sun Sep 2 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...TODAY AND TONIGHT Showers and thunderstorms are expected again this afternoon and tonight across portions of the Outlook Area. Current indications suggest the storm coverage may be higher along and north of the Interstate 80 corridor especially by tonight, but scattered storms may still occur to the south of I-80 as well. Some of these storms may be strong to possibly severe with damaging winds and large hail the main threats. But with all the recent heavy rainfall, today will be another day with an elevated risk of flooding and flash flooding where new storms develop and move across areas already rain-soaked and saturated. Once these areas of concern are better defined, a new Flash Flood Watch may be needed for later today and tonight. Stay tuned for updates. The Storm Prediction Center has placed a Marginal Risk for severe weather this afternoon and tonight for areas generally along and northwest of a line from Keosauqua Iowa, to Burlington Iowa, and to Sterling Illinois. Some area rivers are experiencing rising water levels and flooding. Please see the latest Flood Statements and Flood Warnings for details. Away from the storms and cloud cover, unseasonably warm temperatures and high humidity will combine to produce heat index readings as high as the 90s during the afternoon and early evening hours. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY There will be a chance of thunderstorms almost every day through the period, with them being more common during the evening and night time hours. It is too soon to determine the risk of severe weather. But the storms will have the potential to produce more heavy rain which could lead to additional flash flooding and river flooding. Several area rivers will likely continue to experience high water levels and flooding for much of the upcoming week, especially if rounds of storms continue to effect portions of the Outlook Area. Very warm temperatures and higher than normal humidity will continue for much of the upcoming week, sending heat index readings as high as the 90s during the afternoon and early evening hours. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and tonight. Any reports of new flooding or flash flooding would be appreciated. 12
In the hours before
Special weather statement, Sep 2, 2:39 PM CDT, 22 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 |
|---|---|---|---|---|
| Sep 1, 7:32 PM CDT | Special Weather Statement | DVN | Keokuk | 28 min |
| Sep 1, 7:39 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 36 min |
| Sep 1, 7:52 PM CDT | Tornado Warning | DVN | Keokuk | 23 min |
| Sep 1, 8:14 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk | 46 min |
| Sep 1, 8:23 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk | 37 min |
| Sep 1, 8:56 PM CDT | Special Weather Statement | DVN | Washington | 49 min |
| Sep 1, 9:05 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Washington | 40 min |
| Sep 1, 9:08 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Washington | 52 min |
| Sep 1, 9:22 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 38 min |
| Sep 1, 9:52 PM CDT | Special Weather Statement | DVN | Iowa | 53 min |
| Sep 1, 9:56 PM CDT | Special Weather Statement | DVN | Louisa | 49 min |
| Sep 1, 10:04 PM CDT | Special Weather Statement | DVN | Washington | 26 min |
| Sep 1, 10:08 PM CDT | Flash Flood Warning | DVN | Keokuk | 5 hr |
| Sep 1, 11:20 PM CDT | Flash Flood Warning | DVN | Iowa, Keokuk, Washington | 4 hr |
| Sep 1, 11:29 PM CDT | Special Weather Statement | DVN | Scott | 46 min |
| Sep 1, 11:50 PM CDT | Special Weather Statement | DVN | Dubuque | 25 min |
| Sep 2, 9:26 AM CDT | Flash Flood Watch | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 39 hr |
| Sep 2, 9:53 AM CDT | River Flood Warning | DVN | Cedar, Jones, Linn | 11 days |
| Sep 2, 10:22 AM CDT | River Flood Warning | DVN | Louisa | 16 days |
| Sep 2, 10:22 AM CDT | River Flood Warning | DVN | Des Moines, Louisa | 16 days |
| Sep 2, 10:22 AM CDT | River Flood Warning | DVN | Des Moines | 17 days |
| Sep 2, 10:22 AM CDT | River Flood Warning | DVN | Des Moines, Lee | 17 days |
| Sep 2, 2:39 PM CDT | Special Weather Statement | DVN | Buchanan | 111 min |
| Sep 2, 3:41 PM CDT | Tornado Warning | DVN | Delaware, Dubuque | 22 min |
| Sep 2, 4:31 PM CDT | Special Weather Statement | DVN | Dubuque | 74 min |
| Sep 2, 5:32 PM CDT | Special Weather Statement | DVN | Jones | 43 min |
| Sep 2, 6:18 PM CDT | Special Weather Statement | DVN | Jackson | 42 min |
| Sep 2, 6:25 PM CDT | Special Weather Statement | DVN | Cedar, Muscatine, Scott, Washington | 50 min |
| Sep 2, 6:48 PM CDT | Special Weather Statement | DVN | Jefferson, Van Buren | 42 min |
| Sep 1, 8:42 PM CDT | Special Weather Statement | DVN | Whiteside | 33 min |
| Sep 1, 9:33 PM CDT | Special Weather Statement | DVN | Rock Island | 42 min |
| Sep 1, 9:36 PM CDT | Special Weather Statement | DVN | Rock Island | 39 min |
| Sep 1, 10:01 PM CDT | Special Weather Statement | DVN | Whiteside | 29 min |
| Sep 1, 11:02 PM CDT | Special Weather Statement | DVN | Carroll, Stephenson | 43 min |
| Sep 2, 8:53 AM CDT | River Flood Warning | DVN | Henry, Rock Island, Whiteside | 25 days |
| Sep 2, 8:53 AM CDT | River Flood Warning | DVN | Henry, Rock Island | 14 days |
| Sep 2, 10:22 AM CDT | River Flood Warning | DVN | Hancock | 17 days |
Nearby
Severe Thunderstorm Warnings in Iowa, 2018Every severe thunderstorm 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.