Alert archive / Iowa / Excessive Heat Warnings in 2012
Excessive Heat Warning 1, NWS Omaha, NE
NWS Omaha, NE issued this excessive heat warning at Jul 4, 2012, 3:42 PM CDT for 5 counties in Nebraska; 8 counties in Iowa. It was in force for 53 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
- Jul 4, 2012, 3:42 PM CDT (20:42 UTC)
- Expired
- Jul 6, 2012, 9:00 PM CDT
- In force
- 53 hr
- Issued by
- NWS Omaha, NE
Counties Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Burt County, NE, Douglas County, NE, Sarpy County, NE, Thurston County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 47 km from the middle of the area, began a volume at 20:39 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 12:00Z, 8.7 hours before the alert went out and 48 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.
- Mixed-layer CAPE
- 483 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 2028 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- -16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
What forecasters said that day
The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Omaha, NE wrote its last area forecast discussion before this excessive heat warning went out at Jul 3, 6:33 PM CDT, 21 hours 9 minutes earlier.
Area forecast discussion, Jul 3, 6:33 PM CDT, 21 hours 9 minutes before
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</html>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:55 AM CDT | Heat Advisory | OAX | Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more | 65 hr |
Nearby
Excessive Heat Warnings in Iowa, 2012Excessive Heat Warnings in Nebraska, 2012Every excessive heat warning in 2012
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.