Alert archive / Iowa / Tornado Warnings in 2010
Tornado Warning 9, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at Jun 1, 2010, 1:59 PM CDT for Clay County, Iowa. It was in force for 31 min. 1 report 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 1, 2010, 1:59 PM CDT (18:59 UTC)
- Expired
- Jun 1, 2010, 2:30 PM CDT
- In force
- 31 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
County Clay County, IA
The radar
The Sioux Falls radar (KFSD), 144 km from the middle of the area, began a volume at 19:00 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 1, 2:10 PM CDT | HAIL 1 | Spencer, IA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 1, 1:53 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 7.0 hours before the alert went out and 226 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
- 1529 J/kg
- Mixed-layer CIN
- -110 J/kg
- Mixed-layer LCL
- 815 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
139
WFUS53 KFSD 011859
TORFSD
IAC041-011930-
/O.NEW.KFSD.TO.W.0009.100601T1859Z-100601T1930Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
159 PM CDT TUE JUN 1 2010
THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A
* TORNADO WARNING FOR...
CLAY COUNTY IN NORTHWEST IOWA...
* UNTIL 230 PM CDT
* AT 159 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS
DANGEROUS STORM WAS LOCATED NEAR ROYAL...OR 5 MILES SOUTHWEST OF
SPENCER...AND MOVING EAST AT 30 MPH.
* THIS TORNADIC STORM WILL BE NEAR...
SPENCER AROUND 205 PM CDT...
OTHER LOCATIONS IMPACTED BY THIS TORNADIC THUNDERSTORM INCLUDE
DICKENS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.
&&
LAT...LON 4300 9526 4315 9534 4325 9491 4324 9491
4306 9491 4305 9491
TIME...MOT...LOC 1859Z 253DEG 27KT 4309 9518
$$
WILLIAMS2 follow-up statements
911 WWUS53 KFSD 011911 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 211 PM CDT TUE JUN 1 2010 IAC041-011930- /O.CON.KFSD.TO.W.0009.000000T0000Z-100601T1930Z/ CLAY IA- 211 PM CDT TUE JUN 1 2010 ...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHEASTERN CLAY COUNTY UNTIL 230 PM CDT... AT 211 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR SPENCER...MOVING NORTHEAST AT 30 MPH. THIS TORNADO WILL AFFECT THE TOWN OF DICKES BY 215 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 4303 9506 4317 9519 4325 9491 4305 9491 TIME...MOT...LOC 1911Z 245DEG 27KT 4313 9507 $$ WILLIAMS
405 WWUS53 KFSD 011927 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 227 PM CDT TUE JUN 1 2010 IAC041-011937- /O.EXP.KFSD.TO.W.0009.000000T0000Z-100601T1930Z/ CLAY IA- 227 PM CDT TUE JUN 1 2010 ...THE TORNADO WARNING FOR NORTHEASTERN CLAY COUNTY WILL EXPIRE AT 230 PM CDT... THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED AREA. LAT...LON 4303 9506 4317 9519 4325 9491 4305 9491 TIME...MOT...LOC 1927Z 245DEG 27KT 4318 9492 $$ WILLIAMS
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 1:07 PM CDT | Tornado Warning | FSD | O'Brien, Sioux | 23 min |
| Jun 1, 1:28 PM CDT | Tornado Warning | FSD | Clay, O'Brien | 32 min |
| Jun 1, 2:47 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 28 min |
| Jun 1, 3:37 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 23 min |
Nearby
Tornado Warnings in Iowa, 2010Every tornado warning in 2010Tornadoes in 2010
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.