Alert archive / Iowa / Tornado Warnings in 2019

Tornado Warning 4, NWS La Crosse, WI

May 24, 2019Allamakee County, Iowa

NWS La Crosse, WI issued this tornado warning at May 24, 2019, 8:30 PM CDT for Allamakee County, Iowa. It was in force for 45 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
May 24, 2019, 8:30 PM CDT (01:30 UTC)
Expired
May 24, 2019, 9:15 PM CDT
In force
45 min
Issued by
NWS La Crosse, WI
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Allamakee County, IA

The radar

The La Crosse radar (KARX), 54 km from the middle of the area, began a volume at 01:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 24, 7:49 PM CDTTornado WatchSPC3 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 203 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2019-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2019-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
137 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

787 
WFUS53 KARX 250130
TORARX
IAC005-250215-
/O.NEW.KARX.TO.W.0004.190525T0130Z-190525T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service La Crosse WI
830 PM CDT Fri May 24 2019

The National Weather Service in La Crosse has issued a

* Tornado Warning for...
  Central Allamakee County in northeastern Iowa...

* Until 915 PM CDT.
    
* At 830 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Waukon, moving northeast at 35 mph.

  HAZARD...Tornado.

  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...
  Waukon around 835 PM CDT.
  Lansing around 900 PM CDT.

Other locations impacted by this tornadic thunderstorm include
Ludlow, County Roads A 52 And W 60, State Road 9 And County X 20, Red
Barn Campground, Churchtown and Village Creek.

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 4322 9159 4331 9160 4346 9123 4345 9123
      4341 9120 4339 9120 4337 9122 4335 9121
      4333 9114 4331 9111
TIME...MOT...LOC 0130Z 242DEG 29KT 4327 9154 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CA
3 follow-up statements
587 
WWUS53 KARX 250139
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
839 PM CDT Fri May 24 2019

IAC005-250215-
/O.CON.KARX.TO.W.0004.000000T0000Z-190525T0215Z/
Allamakee IA-
839 PM CDT Fri May 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR CENTRAL
ALLAMAKEE COUNTY...
    
At 838 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Waukon, moving northeast at 35 mph.

HAZARD...Tornado.

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...
  Lansing around 900 PM CDT.

Other locations impacted by this tornadic thunderstorm include State
Road 9 And County X 20, Red Barn Campground, Churchtown and Village
Creek.

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 4325 9145 4335 9150 4346 9123 4345 9123
      4341 9120 4339 9120 4337 9122 4335 9121
      4333 9114 4331 9111
TIME...MOT...LOC 0138Z 245DEG 30KT 4329 9144 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CA
487 
WWUS53 KARX 250148
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
848 PM CDT Fri May 24 2019

IAC005-250215-
/O.CON.KARX.TO.W.0004.000000T0000Z-190525T0215Z/
Allamakee IA-
848 PM CDT Fri May 24 2019

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR
NORTHEASTERN ALLAMAKEE COUNTY...
    
At 847 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lansing, moving northeast at 50 mph.

HAZARD...Tornado.

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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Allamakee County, including the following locations...
Churchtown, Village Creek and Red Barn Campground.

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 4327 9135 4339 9141 4346 9123 4345 9123
      4341 9120 4339 9120 4337 9122 4335 9121
      4333 9114 4331 9111
TIME...MOT...LOC 0147Z 244DEG 41KT 4334 9129 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CA
556 
WWUS53 KARX 250206
SVSARX

Severe Weather Statement
National Weather Service La Crosse WI
906 PM CDT Fri May 24 2019

IAC005-250216-
/O.EXP.KARX.TO.W.0004.000000T0000Z-190525T0215Z/
Allamakee IA-
906 PM CDT Fri May 24 2019

...THE TORNADO WARNING FOR NORTHEASTERN ALLAMAKEE COUNTY WILL EXPIRE
AT 915 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

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

LAT...LON 4327 9135 4339 9141 4346 9123 4345 9123
      4341 9120 4339 9120 4337 9122 4335 9121
      4333 9114 4331 9111
TIME...MOT...LOC 0206Z 242DEG 29KT 4341 9112 

$$

CA

The office that day

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

IssuedProductOfficeCountiesLasted
May 24, 7:37 PM CDTSevere Thunderstorm WarningARXAllamakee, Winneshiek38 min
May 24, 7:59 PM CDTSpecial Weather StatementARXWinneshiek46 min
May 24, 8:26 PM CDTSevere Thunderstorm WarningARXAllamakee, Winneshiek41 min

Nearby

Tornado Warnings in Iowa, 2019Every tornado warning in 2019Tornadoes in 2019

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.