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, 9:13 PM CDT for Webster County, Iowa. It was in force for 32 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, 9:13 PM CDT (02:13 UTC)
- Expired
- Aug 1, 2017, 9:45 PM CDT
- In force
- 32 min
- Issued by
- NWS Des Moines, IA
County Webster County, IA
The radar
The Des Moines radar (KDMX), 107 km from the middle of the area, began a volume at 02:15 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, 2.2 hours before the alert went out and 211 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
- 601 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1685 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
992
WWUS83 KDMX 020213
SPSDMX
Special Weather Statement
National Weather Service Des Moines IA
913 PM CDT TUE AUG 1 2017
IAZ024-034-035-020245-
Humboldt IA-Calhoun IA-Webster IA-
913 PM CDT TUE AUG 1 2017
...LINE OF STORMS MAY PRODUCE DIME TO NICKEL SIZE HAIL ALONG
WITH WIND GUSTS TO 50 MPH...
At 912 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southeast of Dakota City to near
Manson. Movement was southeast at 25 mph.
Dime size hail and wind gusts up to 50 mph will be possible with
these storms.
Locations impacted include...
Fort Dodge, Manson, Fort Dodge Regional Airport, Coalville, Badger,
Otho, Duncombe, Twin Lakes, Barnum, Thor, Vincent, Moorland, Clare,
Somers, Knierim, Woodman Hollow State Park, Frank A Gotch State Park
and Lizard Creek State Recreation Area.
LAT...LON 4255 9464 4256 9460 4256 9444 4261 9444
4272 9406 4244 9397 4234 9453
TIME...MOT...LOC 0212Z 327DEG 21KT 4266 9411 4252 9459
$$
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, 8:22 PM CDT | Special Weather Statement | DMX | Cerro Gordo, Wright | 38 min |
| Aug 1, 8:56 PM CDT | Special Weather Statement | DMX | Franklin, Hamilton | 34 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.