Alert archive / Nebraska / Frost Advisories in 2011

Frost Advisory 5, NWS Hastings, NE

September 29, 201115 counties in Nebraska

NWS Hastings, NE issued this frost advisory at Sep 29, 2011, 3:23 PM CDT for 15 counties in Nebraska. It took effect at Sep 30, 2011, 1:00 AM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Sep 29, 2011, 3:23 PM CDT (20:23 UTC)
In effect from: Sep 30, 2011, 1:00 AM CDT
Expired: Sep 30, 2011, 9:00 AM CDT
In force: 8 hr
Issued by: NWS Hastings, NE

Counties Adams County, NE, Buffalo County, NE, Dawson County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Sherman County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 76 km from the middle of the area, began a volume at 20:25 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 12:00Z, 8.4 hours before the alert went out and 140 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: 2311 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -189 m²/s²
0-3 km storm-relative helicity: 235 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 Hastings, NE wrote its last area forecast discussion before this frost advisory went out at Sep 29, 3:23 PM CDT, 0 minutes earlier.

Area forecast discussion, Sep 29, 3:23 PM CDT, 0 minutes before

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Hazardous weather outlook, Sep 29, 12:45 PM CDT, 2 hours 38 minutes before

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The office that day

Everything else NWS Hastings, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 29, 12:30 PM CDT	Red Flag Warning	GID	Jewell, Mitchell, Osborne, Phillips, Rooks, Smith	7 hr

Nearby

Frost Advisories in Nebraska, 2011 Every frost advisory in 2011

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.