Alert archive / Iowa / Ice Storm Warnings in 2019

Ice Storm Warning 1, NWS Des Moines, IA

February 6, 2019Appanoose County, Davis County, Wapello County, Iowa

NWS Des Moines, IA issued this ice storm warning at Feb 6, 2019, 4:08 PM CST for Appanoose County, Davis County, Wapello County, Iowa. It took effect at Feb 7, 2019, 12:00 AM CST. It was in force for 12 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
Feb 6, 2019, 4:08 PM CST (22:08 UTC)
In effect from
Feb 7, 2019, 12:00 AM CST
Expired
Feb 7, 2019, 12:00 PM CST
In force
12 hr
Issued by
NWS Des Moines, IA

Counties Appanoose County, IA, Davis County, IA, Wapello County, IA

The radar

The Des Moines radar (KDMX), 139 km from the middle of the area, began a volume at 22:12 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

Davenport, (KDVN), launched 12:00Z, 10.1 hours before the alert went out and 193 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 12:00Z on 2019-02-06Temperature 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, Davenport, at 12:00Z on 2019-02-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 square meters per square second.1939587897117Sfc1 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
444 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Des Moines, IA wrote its last area forecast discussion before this ice storm warning went out at Feb 6, 3:50 PM CST, 18 minutes earlier.

Area forecast discussion, Feb 6, 3:50 PM CST, 18 minutes before
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Hazardous weather outlook, Feb 6, 3:58 PM CST, 10 minutes before
Hazardous Weather Outlook
National Weather Service Des Moines IA
358 PM CST Wed Feb 6 2019

IAZ027-028-033>039-044>050-057>062-070>075-081>085-092>095-072200-
Butler-Bremer-Sac-Calhoun-Webster-Hamilton-Hardin-Grundy-
Black Hawk-Crawford-Carroll-Greene-Boone-Story-Marshall-Tama-
Audubon-Guthrie-Dallas-Polk-Jasper-Poweshiek-Cass-Adair-Madison-
Warren-Marion-Mahaska-Adams-Union-Clarke-Lucas-Monroe-Taylor-
Ringgold-Decatur-Wayne-
358 PM CST Wed Feb 6 2019

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

A Winter Weather Advisory is in effect for the area. Please refer
to the National Weather Service website at weather.gov/desmoines
for further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Winter Weather Advisory is in effect for the area Thursday.
Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Bitter cold temperatures and wind chills, into the 20s below
zero are expected Thursday night into early Friday.

.SPOTTER INFORMATION STATEMENT...

IAZ004>007-015>017-023>026-072200-
Emmet-Kossuth-Winnebago-Worth-Palo Alto-Hancock-Cerro Gordo-
Pocahontas-Humboldt-Wright-Franklin-
358 PM CST Wed Feb 6 2019

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

A Winter Weather Advisory is in effect for the area. Please refer
to the National Weather Service website at weather.gov/desmoines
for further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Winter Weather Advisory is in effect for the area through
Thursday evening. Please refer to the National Weather Service
website at weather.gov/desmoines for further details.

Dangerous wind chills are expected on Thursday night into Friday
morning of 30 to nearly 40 below.

.SPOTTER INFORMATION STATEMENT...

IAZ086-096-097-072200-
Wapello-Appanoose-Davis-
358 PM CST Wed Feb 6 2019

This Hazardous Weather Outlook is for portions of central Iowa.

.DAY ONE...This afternoon and tonight

An Ice Storm Warning is in effect for the area. Please refer to
the National Weather Service website at weather.gov/desmoines for
further details.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

An Ice Storm Warning is in effect for the area through Thursday
morning. Please refer to the National Weather Service website at
weather.gov/desmoines for further details.

Bitter cold temperatures and wind chills into the 20s below zero
are expected Thursday night into early Friday.

.SPOTTER INFORMATION STATEMENT...

In the hours before

Local storm report, Feb 6, 11:53 AM CST, 4 hours 15 minutes before
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Local storm report, Feb 6, 11:54 AM CST, 4 hours 14 minutes before
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Special weather statement, Feb 6, 11:57 AM CST, 4 hours 11 minutes before
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Local storm report, Feb 6, 12:01 PM CST, 4 hours 7 minutes before
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The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 5, 9:36 PM CSTWinter Weather AdvisoryDMXAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more54 hr

Nearby

Ice Storm Warnings in Iowa, 2019Every ice 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.