Alert archive / Iowa / Winter Storm Warnings in 2019

Winter Storm Warning 11, NWS La Crosse, WI

April 26, 20194 counties in Wisconsin; 5 counties in Minnesota; 8 counties in Iowa

NWS La Crosse, WI issued this winter storm warning at Apr 26, 2019, 3:05 PM CDT for 4 counties in Wisconsin; 5 counties in Minnesota; 8 counties in Iowa. It took effect at Apr 27, 2019, 7:00 AM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 26, 2019, 3:05 PM CDT (20:05 UTC)
In effect from
Apr 27, 2019, 7:00 AM CDT
Expired
Apr 27, 2019, 2:48 PM CDT
In force
8 hr
Issued by
NWS La Crosse, WI

Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Crawford County, WI, Grant County, WI, Richland County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 72 km from the middle of the area, began a volume at 20:06 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 nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 8.1 hours before the alert went out and 217 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, Minneapolis, MN at 12:00Z on 2019-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2019-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -28 square meters per square second.1939587897Sfc1 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
1278 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
-28 m²/s²
0-3 km storm-relative helicity
46 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 4:02 AM CDTWinter Storm WatchARXCrawford, Grant, La Crosse, Richland, Vernon11 hr
Apr 26, 3:05 PM CDTWinter Weather AdvisoryARXAdams, Buffalo, Juneau, La Crosse, Monroe, Trempealeau24 hr

Nearby

Winter Storm Warnings in Iowa, 2019Winter Storm Warnings in Minnesota, 2019Winter Storm Warnings in Wisconsin, 2019Every winter storm warning 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.