Alert archive / Iowa / Special Weather Statements in 2017
Special Weather Statement, NWS La Crosse, WI
NWS La Crosse, WI issued this special weather statement at Jun 29, 2017, 10:10 PM CDT for Chickasaw County, Howard County, Winneshiek County, Iowa; Fillmore County, Minnesota. It was in force for 65 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
- Jun 29, 2017, 10:10 PM CDT (03:10 UTC)
- Expired
- Jun 29, 2017, 11:15 PM CDT
- In force
- 65 min
- Issued by
- NWS La Crosse, WI
Counties Chickasaw County, IA, Howard County, IA, Winneshiek County, IA, Fillmore County, MN
The radar
The La Crosse radar (KARX), 71 km from the middle of the area, began a volume at 03:13 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, 3.2 hours before the alert went out and 209 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
- 111 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 1070 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -100 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted.
865 WWUS83 KARX 300310 SPSARX Special Weather Statement National Weather Service La Crosse WI 1010 PM CDT THU JUN 29 2017 IAZ009>011-019-029-030-MNZ094>096-300415- Clayton-Winneshiek-Howard-Chickasaw-Fayette-Allamakee-Fillmore- Houston-Mower- 1010 PM CDT THU JUN 29 2017 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT HOWARD...NORTHWESTERN CLAYTON...NORTHERN FAYETTE...WESTERN ALLAMAKEE...WINNESHIEK...EASTERN CHICKASAW...WESTERN HOUSTON AND FILLMORE COUNTIES... At 1010 PM CDT, radar indicated strong thunderstorms were located along a line extending from near Spring Valley to near Jerico. Movement was east at 30 mph. Winds in excess of 40 mph are possible with these storms. Locations impacted include... Decorah, Waukon, Cresco, New Hampton, West Union, Preston, Spring Valley, Postville, Spring Grove, Harmony, Calmar and Fredericksburg. LAT...LON 4382 9163 4290 9137 4291 9229 4368 9249 TIME...MOT...LOC 0310Z 263DEG 27KT 4363 9239 4312 9223 $$ 04
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 11:01 PM CDT | Special Weather Statement | ARX | Crawford, Grant, Richland | 59 min |
| Jun 29, 9:28 PM CDT | Special Weather Statement | ARX | Chickasaw, Floyd, Mitchell | 62 min |
| Jun 29, 9:42 PM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 33 min |
| Jun 30, 6:01 PM CDT | Special Weather Statement | ARX | Mower | 29 min |
| Jun 30, 6:12 PM CDT | Special Weather Statement | ARX | Wabasha | 33 min |
Nearby
Special Weather Statements in Iowa, 2017Special Weather Statements in Minnesota, 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.