Alert archive / Nebraska / Frost Advisories in 2024

Frost Advisory 2, NWS Cheyenne, WY

September 30, 2024Box Butte County, Dawes County, Nebraska

NWS Cheyenne, WY issued this frost advisory at Sep 30, 2024, 7:31 PM MDT for Box Butte County, Dawes County, Nebraska. It took effect at Oct 1, 2024, 3:00 AM MDT. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Sep 30, 2024, 7:31 PM MDT (01:31 UTC)
In effect from: Oct 1, 2024, 3:00 AM MDT
Expired: Oct 1, 2024, 8:00 AM MDT
In force: 5 hr
Issued by: NWS Cheyenne, WY

Counties Box Butte County, NE, Dawes County, NE

The radar

The Rapid City radar (KUDX), 185 km from the middle of the area, began a volume at 01:33 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.5 hours before the alert went out and 256 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 3402 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -64 m²/s²
0-3 km storm-relative helicity: 185 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cheyenne, WY wrote its last area forecast discussion before this frost advisory went out at Sep 30, 5:40 PM MDT, 1 hour 51 minutes earlier.

Area forecast discussion, Sep 30, 5:40 PM MDT, 1 hour 51 minutes before

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Hazardous weather outlook, Sep 30, 5:03 AM MDT, 14 hours 28 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 1, 1:31 AM MDT	High Wind Watch	CYS	Albany, Carbon, Laramie, Platte	34 hr
Oct 1, 1:49 AM MDT	Red Flag Warning	CYS	Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more	42 hr
Oct 1, 1:26 PM MDT	High Wind Warning	CYS	Albany, Carbon, Laramie, Platte	22 hr

Nearby

Frost Advisories in Nebraska, 2024 Every frost advisory in 2024

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.