Alert archive / Iowa / Mesoscale Discussions in 2006

Mesoscale Discussion 1027

May 30, 20065 counties in Iowa; Atchison County, Holt County, Missouri; Nemaha County, Richardson County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 30, 2006, 1:12 AM CDT for 5 counties in Iowa; Atchison County, Holt County, Missouri; Nemaha County, Richardson County, Nebraska. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 30, 2006, 1:12 AM CDT (06:12 UTC)
Expired
May 30, 2006, 3:45 AM CDT
In force
3 hr
Issued by
the Storm Prediction Center

Counties Adams County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Atchison County, MO, Holt County, MO, Nemaha County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 113 km from the middle of the area, began a volume at 06:12 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

Omaha, NE (KOAX), launched 00:00Z, 6.2 hours before the alert went out and 113 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, Omaha, NE at 00:00Z on 2006-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 719 joules per kilogram.LCLLFCEL10008507005003002001001 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, Omaha, NE at 00:00Z on 2006-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.193958Sfc1 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
719 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1806 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.1
Supercell composite
3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 11:13 AM CDTMesoscale DiscussionSPCCedar, Clinton, Dubuque, Jackson, Jones, Muscatine and 1 more2 hr
May 29, 10:36 PM CDTMesoscale DiscussionSPCCass, Gage, Jefferson, Johnson, Nemaha, Otoe and 2 more2 hr

Nearby

Mesoscale Discussions in Iowa, 2006Mesoscale Discussions in Missouri, 2006Mesoscale Discussions in Nebraska, 2006Every mesoscale discussion in 2006

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.