Alert archive / Iowa / Special Weather Statements in 2017
Special Weather Statement, NWS Des Moines, IA
NWS Des Moines, IA issued this special weather statement at Aug 3, 2017, 3:33 AM CDT for Guthrie County, Iowa. It was in force for 27 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
- Aug 3, 2017, 3:33 AM CDT (08:33 UTC)
- Expired
- Aug 3, 2017, 4:00 AM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
County Guthrie County, IA
The radar
The Des Moines radar (KDMX), 85 km from the middle of the area, began a volume at 08:36 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
Omaha, NE (KOAX), launched 00:00Z, 8.6 hours before the alert went out and 140 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
- 1511 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
285 WWUS83 KDMX 030833 SPSDMX Special Weather Statement National Weather Service Des Moines IA 333 AM CDT THU AUG 3 2017 IAZ057-058-030900- Guthrie IA-Audubon IA- 333 AM CDT THU AUG 3 2017 ...Dime sized hail possible... At 332 AM CDT, Doppler radar was tracking a strong thunderstorm 10 miles south of Audubon, moving east at 30 mph. Dime size hail will be possible with this storm. Locations impacted include... Guthrie Center, Exira and Springbrook State Park. LAT...LON 4151 9490 4163 9494 4182 9448 4154 9442 TIME...MOT...LOC 0832Z 254DEG 27KT 4157 9501 $$ Ansorge
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 4:49 AM CDT | Special Weather Statement | DMX | Adams | 41 min |
| Aug 3, 7:12 AM CDT | Special Weather Statement | DMX | Clarke, Decatur, Lucas, Wayne | 48 min |
| Aug 3, 7:41 AM CDT | Special Weather Statement | DMX | Appanoose, Lucas, Monroe, Wayne | 64 min |
| Aug 3, 8:24 AM CDT | Special Weather Statement | DMX | Davis, Wapello | 66 min |
Nearby
Special Weather Statements in Iowa, 2017Every special weather statement in 2017
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.