Alert archive / Iowa / Tornado Warnings in 2022

Tornado Warning 18, NWS La Crosse, WI

June 15, 2022Clayton County, Iowa

NWS La Crosse, WI issued this tornado warning at Jun 15, 2022, 5:17 PM CDT for Clayton County, Iowa. It was in force for 20 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 15, 2022, 5:17 PM CDT (22:17 UTC)
Expired: Jun 15, 2022, 5:37 PM CDT
In force: 20 min
Issued by: NWS La Crosse, WI
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.25 in

County Clayton County, IA

The radar

The La Crosse radar (KARX), 119 km from the middle of the area, began a volume at 22:22 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 15, 2:28 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.3 hours before the alert went out and 140 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1163 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 1197 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted.

687 
WFUS53 KARX 152217
TORARX
IAC043-152300-
/O.NEW.KARX.TO.W.0018.220615T2217Z-220615T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
517 PM CDT Wed Jun 15 2022

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Southwestern Clayton County in northeastern Iowa...

* Until 600 PM CDT.
    
* At 517 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Strawberry Point, or 10 miles north of Manchester,
  moving northeast at 55 mph.

  HAZARD...Tornado and half dollar size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Edgewood around 520 PM CDT.
  Guttenberg around 540 PM CDT.

Other locations impacted by this tornadic thunderstorm include Lock
And Dam 10, Mederville, Garber, Wood, Motor, Elkport and Communia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4265 9159 4284 9134 4284 9110 4283 9109
      4283 9108 4277 9107 4276 9106 4276 9107
      4264 9133
TIME...MOT...LOC 2217Z 234DEG 51KT 4264 9150 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN

$$

Rieck

2 follow-up statements

700 
WWUS53 KARX 152233
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
533 PM CDT Wed Jun 15 2022

IAC043-152300-
/O.CON.KARX.TO.W.0018.000000T0000Z-220615T2300Z/
Clayton IA-
533 PM CDT Wed Jun 15 2022

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR SOUTH
CENTRAL CLAYTON COUNTY...
    
At 533 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Garnavillo, or 7 miles west of Guttenberg, moving
northeast at 60 mph.

HAZARD...Tornado and half dollar size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Guttenberg around 540 PM CDT.

Other locations impacted by this tornadic thunderstorm include Lock
And Dam 10, Garber, Wood, Motor, Elkport, Osterdock and County Roads
X 47 And C 7 X.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4265 9136 4284 9134 4284 9110 4283 9109
      4283 9108 4277 9107 4276 9106 4276 9107
      4264 9133
TIME...MOT...LOC 2233Z 234DEG 51KT 4277 9125 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.25 IN

$$

Rieck

339 
WWUS53 KARX 152237
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
537 PM CDT Wed Jun 15 2022

IAC043-152247-
/O.CAN.KARX.TO.W.0018.000000T0000Z-220615T2300Z/
Clayton IA-
537 PM CDT Wed Jun 15 2022

...THE TORNADO WARNING FOR SOUTH CENTRAL CLAYTON COUNTY IS
CANCELLED...
    
The tornado threat has diminished and the Tornado Warning has been
cancelled. However, large hail and damaging winds remain likely and a
Severe Thunderstorm Warning remains in effect for the area.

A Tornado Watch remains in effect until 1000 PM CDT for northeastern
Iowa...and southwestern Wisconsin.

LAT...LON 4265 9136 4284 9134 4284 9110 4283 9109
      4283 9108 4277 9107 4276 9106 4276 9107
      4264 9133
TIME...MOT...LOC 2236Z 234DEG 51KT 4281 9118 

$$

Rieck

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS La Crosse, WI wrote its last area forecast discussion before this tornado warning went out at Jun 15, 3:33 PM CDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jun 15, 3:33 PM CDT, 1 hour 44 minutes before

Area Forecast Discussion
National Weather Service La Crosse WI
333 PM CDT Wed Jun 15 2022

.DISCUSSION...(This evening through Wednesday)
Issued at 332 PM CDT Wed Jun 15 2022

Key Messages:

 - Severe potential late this afternoon into this evening

 - Windy conditions Thursday

 - Hot conditions Sunday into early next week

his evening into Thursday

Latest water vapor satellite imagery shows vigorous shortwave trough
embedded southwest flow aloft over the eastern Dakotas/western
Minnesota. Out ahead of the shortwave trough...showers/storms have
begun to redevelop over much of Minnesota and western
Wisconsin...per latest mosaic radar. Latest SPC analysis indicate
southwest/central Wisconsin and northeast Iowa have begun to have no
surface convective inhibition and surface based CAPE of 3000 to 4500
j/kg. In combination...of decent low level 0-1km
shear...approximately 10 to 20 knots...and effective shear of 40 to
50 knots. Storms are expected to be severe this afternoon and into
early this evening. With decent low level shear and deep shear over
the forecast area...main threats will be tornadoes...damaging winds
and large hail. Locally heavy rain will also be possible...with
precipitable water values of 1.5 to 2 inches across the area.

Shortwave trough and associated surface features will track east of
the region tonight into Thursday. This will allow for drier airmass
to advect into the region. Subsidence behind the shortwave
trough/pressure gradient tightens behind surface front and winds
mixing down aloft will increase wind speeds of 20 to 25 mph and
gusts 35 to 40 miles per hour possibly...as bufkit soundings show
top of mix layer winds to be 35 to 38 knots across the northern
portions of the forecast area.

Friday into Saturday

Surface ridge builds into the Upper Great Lakes Region/Upper
Mississippi River Valley Friday into Saturday and provide dry
weather and more comfortable temperatures across the forecast area.
High temperatures are expected to be in the upper 70s to lower 80s.

Main forecast concerns Saturday night into Wednesday are hot
conditions Monday into Tuesday. The 15.12z GFS/ECMWF are in decent
agreement building upper level ridge into the central United States
Monday into Tuesday. 925mb temperatures will warm to plus 22 to plus
25 degrees celsius and the 15.00z NAEFS indicate plus 2 to plus 2.5
standard temperature anomalies over the forecast area. High
temperatures are expected to climb into the upper 80s to middle 90s
Monday into Tuesday. A couple of shortwave energy overtopping the
upper level ridge will flatten the upper level ridge Tuesday night
into Wednesday. These pieces of energy will provide a small chance
of showers/storms late Tuesday into Wednesday across much of the
forecast area.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 1233 PM CDT Wed Jun 15 2022

Main taf concerns are showers and thunderstorms to impact the taf
sites this afternoon. Then windy conditions Thursday. A cold front
will track across the area this afternoon. Showers/storms are
expected along the front and impact the taf sites this afternoon.
However...the showers/storms will impact RST taf early to middle
of the afternoon and move east of the taf site by 20-21z
timeframe. Expect the showers/storms to impact the LSE taf site
through 23z. Storms could be severe this afternoon. MVFR or IFR
conditions are expected in the heavier/stronger showers/storms.
Behind the cold front clearing skies and drier airmass is expected
to filter into the region. Low level wind shear will be possible
after 10z to around 14z at taf sites. Winds will mix down from
aloft after 14z and gusts up to 35 knots late in the taf period.

&&

.HYDROLOGY...
Issued at 332 PM CDT Wed Jun 15 2022

With a couple of rounds of convection in the last couple of
days...any additional heavy rainfall late this afternoon into this
evening could cause flash flooding. Airmass is very moist and
precipitable water values are 1.5 to 2 inches across the forecast
area.  Areas that have been affected by higher amounts in the
previous couple of days will be more susceptible to flash
flooding.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...NONE.
MN...NONE.
IA...NONE.
&&

DISCUSSION...DTJ
AVIATION...DTJ
HYDROLOGY...DTJ

Hazardous weather outlook, Jun 15, 12:33 PM CDT, 4 hours 44 minutes before

Hazardous Weather Outlook
National Weather Service La Crosse WI
1233 PM CDT Wed Jun 15 2022

IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029-
032>034-041>044-053>055-061-162145-
Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette-
Clayton-Wabasha-Dodge-Olmsted-Winona-Mower-Fillmore-Houston-
Taylor-Clark-Buffalo-Trempealeau-Jackson-La Crosse-Monroe-Juneau-
Adams-Vernon-Crawford-Richland-Grant-
1233 PM CDT Wed Jun 15 2022

This Hazardous Weather Outlook is for portions of southeast
Minnesota...northeast Iowa...and southwest into central
Wisconsin.

.DAY ONE...This Afternoon and Tonight

Severe storms are likely this afternoon through early evening.
Hazards include very large hail, tornadoes, damaging winds, and
heavy rain. Strong tornadoes are possible, especially across
southwest and central Wisconsin. Localized flash flooding could
occur.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon.

.EMERGENCY MANAGEMENT COORDINATION...

No webinar is scheduled.

In the hours before

Local storm report, Jun 15, 3:49 PM CDT, 1 hour 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
349 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0343 PM     TSTM WND GST     PATCH GROVE             42.94N 90.97W
06/15/2022  M65 MPH          GRANT              WI   FIRE DEPT/RESCUE

            ALSO REPORTED PEA SIZE HAIL.

&&

EAD

Local storm report, Jun 15, 4:19 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
419 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0412 PM     TSTM WND DMG     6 NNE WILTON            43.90N 90.49W
06/15/2022                   MONROE             WI   AMATEUR RADIO

            TREES DOWNS BLOCKING ROAD AT COUNTY A AND
            STATE HIGHWAY 131.

&&

EAD

Local storm report, Jun 15, 4:53 PM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
453 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0447 PM     TSTM WND DMG     MAUSTON                 43.80N 90.08W
06/15/2022                   JUNEAU             WI   LAW ENFORCEMENT

            CONFIRMED TORNADO. DAMAGE TO HOSPITAL AND
            GROUNDS.

&&

EAD

Local storm report, Jun 15, 5:12 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
512 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0505 PM     TSTM WND DMG     MAUSTON                 43.80N 90.08W
06/15/2022                   JUNEAU             WI   PUBLIC

            STREET SIGNS DOWN, SIGNAL LIGHTS DAMAGED.

&&

EAD

Local storm report, Jun 15, 5:15 PM CDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
515 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     FUNNEL CLOUD     1 E ADAMS               43.96N 89.80W
06/15/2022                   ADAMS              WI   PUBLIC

&&

EAD

Local storm report, Jun 15, 5:17 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LA CROSSE WI
517 PM CDT WED JUN 15 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0515 PM     TSTM WND DMG     4 SSE VALLEY            43.60N 90.51W
06/15/2022                   VERNON             WI   EMERGENCY MNGR

            STRUCTURE DAMAGE TO A HOUSE AND TWO CAMPERS.
            DAMAGE CONTINUES TOWARDS HWY 82 AND CANNON
            AVE.

&&

The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 12:35 AM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	26 min
Jun 15, 3:02 AM CDT	Special Weather Statement	ARX	Chickasaw, Floyd, Howard, Mitchell	58 min
Jun 15, 3:37 AM CDT	Special Weather Statement	ARX	Fayette	38 min
Jun 15, 9:47 AM CDT	Severe Thunderstorm Warning	ARX	Floyd, Mitchell	43 min
Jun 15, 10:25 AM CDT	Severe Thunderstorm Warning	ARX	Chickasaw, Howard	40 min
Jun 15, 10:52 AM CDT	Severe Thunderstorm Warning	ARX	Winneshiek	38 min
Jun 15, 11:32 AM CDT	Areal Flood Advisory	ARX	Floyd, Howard, Mitchell	4 hr
Jun 15, 5:09 PM CDT	Severe Thunderstorm Warning	ARX	Clayton, Fayette	36 min

Nearby

Tornado Warnings in Iowa, 2022 Every tornado warning in 2022 Tornadoes in 2022

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.