Alert archive / Iowa / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 139, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jun 28, 2017, 3:52 PM CDT for Chickasaw County, Fayette County, Winneshiek County, Iowa. It was in force for 38 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 28, 2017, 3:52 PM CDT (20:52 UTC)
- Expired
- Jun 28, 2017, 4:30 PM CDT
- In force
- 38 min
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Chickasaw County, IA, Fayette County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 118 km from the middle of the area, began a volume at 20:55 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 28, 3:59 PM CDT | HAIL 0.75 | 3 Nne Boyd, IA | NEAR 205TH AND HIGHWAY 18. |
| Jun 28, 4:03 PM CDT | TSTM WND DMG | Calmar, IA | TREE SNAPPED. RELAYED VIA BROADCAST MEDIA. TIME ESTIMATED FROM RADAR. |
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 28, 2:53 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 8.9 hours before the alert went out and 198 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
- 134 J/kg
- Mixed-layer CIN
- -204 J/kg
- Mixed-layer LCL
- 1152 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
571
WUUS53 KARX 282052
SVRARX
IAC037-065-191-282130-
/O.NEW.KARX.SV.W.0139.170628T2052Z-170628T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service La Crosse WI
352 PM CDT WED JUN 28 2017
The National Weather Service in La Crosse has issued a
* Severe Thunderstorm Warning for...
Northern Fayette County in northeastern Iowa...
Southern Winneshiek County in northeastern Iowa...
Chickasaw County in northeastern Iowa...
* Until 430 PM CDT
* At 351 PM CDT, a severe thunderstorm was located over New Hampton,
moving east at 60 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Fredericksburg around 355 PM CDT.
Lawler around 400 PM CDT.
Waucoma around 405 PM CDT.
Hawkeye and Fort Atkinson around 410 PM CDT.
West Union and Calmar around 415 PM CDT.
Ossian around 420 PM CDT.
Clermont and Elgin around 425 PM CDT.
Other locations impacted by this severe thunderstorm include
Chickasaw, Wadena, Castalia, St. Lucas and North Washington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
Iowa.
LAT...LON 4290 9205 4291 9208 4291 9255 4315 9255
4322 9161 4282 9161
TIME...MOT...LOC 2051Z 271DEG 53KT 4305 9230
HAIL...1.00IN
WIND...60MPH
$$
JAM3 follow-up statements
926
WWUS53 KARX 282104
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
404 PM CDT WED JUN 28 2017
IAC037-065-191-282130-
/O.CON.KARX.SV.W.0139.000000T0000Z-170628T2130Z/
Fayette IA-Winneshiek IA-Chickasaw IA-
404 PM CDT WED JUN 28 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR NORTHERN FAYETTE...SOUTHERN WINNESHIEK AND CHICKASAW COUNTIES...
At 403 PM CDT, a severe thunderstorm was located over Lawler, or 8
miles east of New Hampton, moving east at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters reported penny sized hail in New
Hampton at 345 PM.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe storm will be near...
Hawkeye and Fort Atkinson around 415 PM CDT.
Calmar around 420 PM CDT.
West Union and Ossian around 425 PM CDT.
Clermont and Elgin around 430 PM CDT.
Other locations impacted by this severe thunderstorm include
Chickasaw, Wadena, Castalia, St. Lucas and Jackson Junction.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
Iowa.
LAT...LON 4290 9205 4291 9208 4291 9255 4304 9255
4318 9214 4322 9161 4282 9161
TIME...MOT...LOC 2103Z 272DEG 43KT 4305 9214
HAIL...1.00IN
WIND...60MPH
$$
JAM995
WWUS53 KARX 282117
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
417 PM CDT WED JUN 28 2017
IAC037-065-191-282130-
/O.CON.KARX.SV.W.0139.000000T0000Z-170628T2130Z/
Fayette IA-Winneshiek IA-Chickasaw IA-
417 PM CDT WED JUN 28 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR NORTHERN FAYETTE...SOUTHERN WINNESHIEK AND SOUTHERN CHICKASAW
COUNTIES...
At 417 PM CDT, severe thunderstorms were located along a line
extending from near Ossian to near Fredericksburg, moving east at 50
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
These severe storms will be near...
Clermont, Ossian and Elgin around 420 PM CDT.
West Union and Hawkeye around 430 PM CDT.
Other locations impacted by these severe thunderstorms include
Wadena, Castalia, St. Lucas, Jackson Junction and Festina.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
A tornado watch remains in effect until 1000 PM CDT for northeastern
Iowa.
LAT...LON 4290 9205 4291 9208 4291 9255 4300 9255
4314 9212 4322 9161 4282 9161
TIME...MOT...LOC 2117Z 276DEG 42KT 4312 9167 4293 9223
HAIL...1.00IN
WIND...60MPH
$$
JAM707
WWUS53 KARX 282131
SVSARX
Severe Weather Statement
National Weather Service La Crosse WI
431 PM CDT WED JUN 28 2017
IAC037-065-191-282140-
/O.EXP.KARX.SV.W.0139.000000T0000Z-170628T2130Z/
Fayette IA-Winneshiek IA-Chickasaw IA-
431 PM CDT WED JUN 28 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FAYETTE...SOUTHERN
WINNESHIEK AND SOUTHERN CHICKASAW COUNTIES HAS EXPIRED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been allowed to expire. However heavy rain
is still possible with these thunderstorms.
A tornado watch remains in effect until 1000 PM CDT for northeastern
Iowa.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
La Crosse.
LAT...LON 4290 9205 4291 9208 4291 9255 4300 9255
4314 9212 4322 9161 4282 9161
TIME...MOT...LOC 2130Z 270DEG 53KT 4312 9141 4293 9198
$$
JAMThe office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:02 PM CDT | Special Weather Statement | ARX | Chickasaw, Floyd, Winneshiek | 43 min |
| Jun 28, 3:38 PM CDT | Special Weather Statement | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd | 52 min |
| Jun 28, 4:34 PM CDT | Special Weather Statement | ARX | Clayton, Fayette | 56 min |
| Jun 28, 4:49 PM CDT | Tornado Warning | ARX | Clayton | 26 min |
| Jun 28, 5:11 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 64 min |
| Jun 28, 5:36 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 54 min |
| Jun 28, 5:51 PM CDT | Flash Flood Warning | ARX | Clayton, Fayette | 3 hr |
| Jun 28, 6:04 PM CDT | Special Weather Statement | ARX | Clayton | 26 min |
| Jun 28, 6:19 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 26 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.