Alert archive / Nebraska / Heat Advisories in 2021
Heat Advisory 8, NWS Omaha, NE
NWS Omaha, NE issued this heat advisory at Jul 29, 2021, 2:58 PM CDT for 10 counties in Nebraska. It took effect at Jul 30, 2021, 12:00 PM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 29, 2021, 2:58 PM CDT (19:58 UTC)
- In effect from
- Jul 30, 2021, 12:00 PM CDT
- Expired
- Jul 30, 2021, 8:50 PM CDT
- In force
- 9 hr
- Issued by
- NWS Omaha, NE
Counties Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Seward County, NE
The radar
The Omaha radar (KOAX), 100 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 100 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
- 1971 J/kg
- Mixed-layer CIN
- -229 J/kg
- Mixed-layer LCL
- 1128 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this heat advisory 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 heat advisory went out at Jul 29, 12:23 PM CDT, 2 hours 35 minutes earlier.
Area forecast discussion, Jul 29, 12:23 PM CDT, 2 hours 35 minutes before
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</html>Hazardous weather outlook, Jul 29, 3:50 AM CDT, 11 hours 8 minutes before
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Special weather statement, Jul 29, 1:21 PM CDT, 1 hour 37 minutes before
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</html>Special weather statement, Jul 29, 2:18 PM CDT, 40 minutes before
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<main class="wrap">
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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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 29, 5:14 PM CDT | Special Weather Statement | OAX | Richardson | 16 min |
Nearby
Heat Advisories in Nebraska, 2021Every heat advisory in 2021
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.