Alert archive / Iowa / Special Weather Statements in 2018
Special Weather Statement, NWS Des Moines, IA
NWS Des Moines, IA issued this special weather statement at May 8, 2018, 8:39 PM CDT for Humboldt County, Iowa. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 8, 2018, 8:39 PM CDT (01:39 UTC)
- Expired
- May 8, 2018, 9:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Des Moines, IA
County Humboldt County, IA
The radar
The Des Moines radar (KDMX), 124 km from the middle of the area, began a volume at 01:40 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, 1.7 hours before the alert went out and 232 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1184 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at May 8, 6:43 PM CDT, 1 hour 56 minutes earlier.
Area forecast discussion, May 8, 6:43 PM CDT, 1 hour 56 minutes before
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</html>Hazardous weather outlook, May 8, 5:55 PM CDT, 2 hours 44 minutes before
Hazardous Weather Outlook National Weather Service Des Moines IA 555 PM CDT Tue May 8 2018 IAZ004>007-015>017-023>028-033>039-044>050-057>059-092300- 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- 555 PM CDT Tue May 8 2018 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight Scattered thunderstorms are likely tonight. A few storms may be strong, with hail and strong winds the main threats. Locally heavy rainfall is also possible. River flooding continues or may occur across northern Iowa in parts of the Des Moines, Iowa and Cedar River basins. Flood Warnings remain in effect for some of these areas. Please refer to the National Weather Service website at weather.gov/desmoines for further details. .DAYS TWO THROUGH SEVEN...Wednesday through Monday There are periodic thunderstorm chances Wednesday morning and again Thursday evening through Saturday. At this time, severe weather chances are low. Moderate rainfall is possible Thursday evening through Saturday which may extend current river flood warnings across the region or lead to additional river flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ060>062-070>075-081>086-092>097-092300- Polk-Jasper-Poweshiek-Cass-Adair-Madison-Warren-Marion-Mahaska- Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur- Wayne-Appanoose-Davis- 555 PM CDT Tue May 8 2018 This Hazardous Weather Outlook is for portions of central Iowa. .DAY ONE...Tonight Scattered, non-severe thunderstorms are possible tonight, especially southeast. .DAYS TWO THROUGH SEVEN...Wednesday through Monday There are periodic thunderstorm chances Wednesday morning and again Thursday evening through Saturday. At this time, severe weather chances are low, though a few storms may be strong on Thursday and Saturday evenings, especially south and southeast. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. Kotenberg
In the hours before
Special weather statement, May 8, 5:07 PM CDT, 3 hours 32 minutes before
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</html>Special weather statement, May 8, 8:39 PM CDT, 0 minutes before
Special Weather Statement National Weather Service Des Moines IA 839 PM CDT TUE MAY 8 2018 IAZ024-090215- Humboldt IA- 839 PM CDT TUE MAY 8 2018 ...Strong storm moving through northern Humboldt County... At 838 PM CDT, Doppler radar was tracking a strong thunderstorm near Dakota City, moving north at 15 mph. Dime size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Humboldt, Livermore, Bode, Lu Verne, St. Joseph, Hardy and Humboldt Municipal Airport. LAT...LON 4273 9407 4274 9428 4291 9432 4291 9397 TIME...MOT...LOC 0138Z 187DEG 13KT 4277 9420 Martin
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 8:10 PM CDT | Special Weather Statement | DMX | Greene | 35 min |
| May 8, 8:55 PM CDT | Special Weather Statement | DMX | Emmet | 50 min |
| May 8, 9:16 PM CDT | Special Weather Statement | DMX | Hancock | 29 min |
| May 8, 10:46 PM CDT | Special Weather Statement | DMX | Wright | 29 min |
| May 9, 2:21 AM CDT | Special Weather Statement | DMX | Bremer, Butler | 54 min |
Nearby
Special Weather Statements in Iowa, 2018Every special weather statement 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.