Alert archive / Iowa / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 138, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 4, 2019, 6:47 PM CDT for Franklin County, Wright County, Iowa. It was in force for 43 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
- Jul 4, 2019, 6:47 PM CDT (23:47 UTC)
- Expired
- Jul 4, 2019, 7:30 PM CDT
- In force
- 43 min
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Franklin County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 113 km from the middle of the area, began a volume at 23:47 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 12:00Z, 11.8 hours before the alert went out and 236 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
- 352 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1017 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 3:19 PM CDT, 3 hours 28 minutes earlier.
Area forecast discussion, Jul 4, 3:19 PM CDT, 3 hours 28 minutes before
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</html>Hazardous weather outlook, Jul 4, 3:37 PM CDT, 3 hours 10 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 337 PM CDT Thu Jul 4 2019 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-051100- Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo- Pocahontas-Humboldt-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- 337 PM CDT Thu Jul 4 2019 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...This afternoon and tonight Widely scattered thunderstorms will redevelop late this afternoon into tonight, mainly in northern and northwestern Iowa where a few storms could produce strong wind gusts and locally heavy rain. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Thunderstorm chances will persist intermittently at least through Saturday and perhaps into Sunday. Isolated severe storms and locally heavy rain will remain possible at times. Additional thunderstorms will return between Monday night and Wednesday. The severe weather threat for next week will be evaluated in more detail in later outlooks. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible at times through the week, but generally unlikely. Lee
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 7:21 PM CDT | Severe Thunderstorm Warning | DMX | Union | 24 min |
| Jul 3, 7:25 PM CDT | Flash Flood Warning | DMX | Union | 6 hr |
| Jul 3, 9:14 PM CDT | Areal Flood Warning | DMX | Boone, Story | 12 hr |
| Jul 4, 6:52 PM CDT | Flash Flood Warning | DMX | Humboldt, Kossuth, Palo Alto, Pocahontas | 4 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 2019Every severe thunderstorm warning in 2019
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.