Alert archive / Iowa / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 85, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 21, 2017, 10:47 PM CDT for Osceola County, Iowa. It was in force for 28 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 21, 2017, 10:47 PM CDT (03:47 UTC)
- Expired
- Jun 21, 2017, 11:15 PM CDT
- In force
- 28 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
County Osceola County, IA
The radar
The Sioux Falls radar (KFSD), 97 km from the middle of the area, began a volume at 03:47 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 10:50 PM CDT | HAIL 1 | 4 Ene Sibley, IA | |
| Jun 21, 10:58 PM CDT | HAIL 0.88 | 4 W Ocheyedan, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 3.8 hours before the alert went out and 225 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
- 1414 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
826 WUUS53 KFSD 220347 SVRFSD IAC143-220415- /O.NEW.KFSD.SV.W.0085.170622T0347Z-170622T0415Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Sioux Falls SD 1047 PM CDT WED JUN 21 2017 The National Weather Service in Sioux Falls has issued a * Severe Thunderstorm Warning for... Osceola County in northwestern Iowa... * Until 1115 PM CDT * At 1047 PM CDT, a severe thunderstorm was located near Sibley, moving east at 15 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * This severe thunderstorm will be near, Ocheyedan and Harris around 1115 PM CDT. Other locations impacted by this severe thunderstorm include Bigelow. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4327 9539 4339 9580 4350 9580 4350 9539 TIME...MOT...LOC 0347Z 284DEG 14KT 4343 9568 HAIL...1.25IN WIND...<50MPH $$ JH
2 follow-up statements
990 WWUS53 KFSD 220402 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 1102 PM CDT WED JUN 21 2017 IAC143-220415- /O.CON.KFSD.SV.W.0085.000000T0000Z-170622T0415Z/ Osceola IA- 1102 PM CDT WED JUN 21 2017 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR EASTERN OSCEOLA COUNTY... At 1102 PM CDT, a severe thunderstorm was located near Ocheyedan, or 9 miles east of Sibley, moving east at 20 mph. HAZARD...Half dollar size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe storm will be near... Ocheyedan around 1105 PM CDT. Harris around 1115 PM CDT. Other locations impacted by this severe thunderstorm include Bigelow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare immediately for large hail and deadly cloud to ground lightning. Seek shelter inside a well-built structure. Stay away from windows. && LAT...LON 4336 9571 4350 9571 4350 9539 4327 9539 TIME...MOT...LOC 0402Z 284DEG 18KT 4341 9556 HAIL...1.25IN WIND...<50MPH $$ JH
119
WWUS53 KFSD 220417
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
1117 PM CDT WED JUN 21 2017
IAC143-220426-
/O.EXP.KFSD.SV.W.0085.000000T0000Z-170622T0415Z/
Osceola IA-
1117 PM CDT WED JUN 21 2017
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN OSCEOLA COUNTY HAS
EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.
LAT...LON 4336 9571 4350 9571 4350 9539 4327 9539
TIME...MOT...LOC 0416Z 284DEG 14KT 4340 9549
$$
JHThe office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 10:17 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay | 13 min |
| Jun 21, 11:33 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson | 27 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2017Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.