Alert archive / Nebraska / Freeze Warnings in 2017

Freeze Warning 1, NWS Omaha, NE

April 10, 20176 counties in Nebraska

NWS Omaha, NE issued this freeze warning at Apr 10, 2017, 3:28 PM CDT for 6 counties in Nebraska. It took effect at Apr 11, 2017, 1:00 AM CDT. It was in force for 7 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: Apr 10, 2017, 3:28 PM CDT (20:28 UTC)
In effect from: Apr 11, 2017, 1:00 AM CDT
Expired: Apr 11, 2017, 8:00 AM CDT
In force: 7 hr
Issued by: NWS Omaha, NE

Counties Butler County, NE, Gage County, NE, Jefferson County, NE, Lancaster County, NE, Saline County, NE, Seward County, NE

The radar

The Omaha radar (KOAX), 92 km from the middle of the area, began a volume at 20:31 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

Topeka, KS (KFOE), launched 12:00Z, 8.5 hours before the alert went out and 216 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: 1300 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -55 m²/s²
0-3 km storm-relative helicity: 141 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 freeze 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 freeze warning went out at Apr 10, 3:27 PM CDT, 1 minute earlier.

Area forecast discussion, Apr 10, 3:27 PM CDT, 1 minute before

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Hazardous weather outlook, Apr 10, 11:39 AM CDT, 3 hours 49 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:14 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	46 min
Apr 9, 8:26 PM CDT	Special Weather Statement	OAX	Butler, Saunders	34 min
Apr 9, 8:44 PM CDT	Special Weather Statement	OAX	Lancaster	46 min
Apr 9, 8:52 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Lancaster, Saline	38 min
Apr 9, 9:11 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Lancaster, Nemaha, Otoe	49 min
Apr 9, 9:24 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Otoe, Pawnee	33 min
Apr 9, 9:47 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	43 min
Apr 9, 10:02 PM CDT	Special Weather Statement	OAX	Pawnee	43 min
Apr 9, 10:18 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Nemaha, Pawnee, Richardson	42 min
Apr 9, 10:26 PM CDT	Special Weather Statement	OAX	Pawnee	49 min
Apr 9, 10:30 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Johnson, Nemaha, Pawnee, Richardson	45 min
Apr 9, 11:01 PM CDT	Special Weather Statement	OAX	Nemaha	29 min
Apr 9, 11:17 PM CDT	Special Weather Statement	OAX	Nemaha	43 min
Apr 9, 11:36 PM CDT	Special Weather Statement	OAX	Nemaha, Richardson	24 min
Apr 9, 11:39 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Richardson	36 min
Apr 10, 12:16 AM CDT	Severe Thunderstorm Warning	OAX	Richardson	29 min
Apr 9, 10:05 PM CDT	Special Weather Statement	OAX	Fremont	40 min

Nearby

Freeze Warnings in Nebraska, 2017 Every freeze warning in 2017

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.