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 1, 2017, 8:22 PM CDT for Cerro Gordo County, Wright County, Iowa. It was in force for 38 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 1, 2017, 8:22 PM CDT (01:22 UTC)
- Expired
- Aug 1, 2017, 9:00 PM CDT
- In force
- 38 min
- Issued by
- NWS Des Moines, IA
Counties Cerro Gordo County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 125 km from the middle of the area, began a volume at 01:22 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, 1.4 hours before the alert went out and 223 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
- 162 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1902 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
924
WWUS83 KDMX 020122
SPSDMX
Special Weather Statement
National Weather Service Des Moines IA
822 PM CDT TUE AUG 1 2017
IAZ016-017-025-026-036-020200-
Hamilton IA-Wright IA-Cerro Gordo IA-Franklin IA-Hancock IA-
822 PM CDT TUE AUG 1 2017
...LINE OF STRONG STORMS MAY PRODUCE WINDS OF 40 TO 50 MPH
ALONG WITH PENNY TO DIME SIZE HAIL...
At 821 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Eagle Grove to near Mason City. Movement
was south at 35 mph.
Dime size hail and wind gusts up to 50 mph will be possible with
these storms.
Locations impacted include...
Mason City, Garner, Clarion, Eagle Grove, Belmond, Sheffield,
Rockwell, Clear Lake, Big Wall Lake, Mason City Municipal Airport,
Elm Lake, Ventura, Kanawha, Goldfield, Dows, Klemme, Latimer,
Thornton, Coulter and Meservey.
LAT...LON 4304 9302 4289 9302 4246 9393 4247 9393
4247 9396 4282 9396 4320 9347 4323 9321
TIME...MOT...LOC 0121Z 340DEG 31KT 4271 9390 4318 9321
$$
KotenbergThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:12 PM CDT | Special Weather Statement | DMX | Humboldt | 33 min |
| Aug 1, 7:16 PM CDT | Special Weather Statement | DMX | Kossuth, Winnebago | 29 min |
| Aug 1, 7:45 PM CDT | Special Weather Statement | DMX | Cerro Gordo, Hancock, Worth | 45 min |
| Aug 1, 8:56 PM CDT | Special Weather Statement | DMX | Franklin, Hamilton | 34 min |
| Aug 1, 9:13 PM CDT | Special Weather Statement | DMX | Webster | 32 min |
| Aug 1, 9:21 PM CDT | Special Weather Statement | DMX | Hamilton, Hardin | 39 min |
| Aug 1, 9:47 PM CDT | Special Weather Statement | DMX | Hamilton, Webster | 28 min |
| Aug 1, 9:58 PM CDT | Special Weather Statement | DMX | Story | 32 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.