Alert archive / Nebraska / Dense Fog Advisories in 2021
Dense Fog Advisory 10, NWS North Platte, NE
NWS North Platte, NE issued this dense fog advisory at Sep 15, 2021, 5:56 AM CDT for Frontier County, Hayes County, Nebraska. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 15, 2021, 5:56 AM CDT (10:56 UTC)
- Expired
- Sep 15, 2021, 10:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS North Platte, NE
Counties Frontier County, NE, Hayes County, NE
The radar
The Goodland radar (KGLD), 153 km from the middle of the area, began a volume at 10:58 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
Denver, CO (KDNR), launched 00:00Z, 10.9 hours before the alert went out and 225 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
- 994 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1842 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS North Platte, NE wrote its last area forecast discussion before this dense fog advisory went out at Sep 15, 4:27 AM CDT, 1 hour 29 minutes earlier.
Area forecast discussion, Sep 15, 4:27 AM CDT, 1 hour 29 minutes before
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</html>Hazardous weather outlook, Sep 15, 3:51 AM CDT, 2 hours 5 minutes before
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</html>Nearby
Dense Fog Advisories in Nebraska, 2021Every dense fog 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.