Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS Hastings, NE

July 30, 2021Greeley County, Nance County, Valley County, Nebraska

NWS Hastings, NE issued this special weather statement at Jul 30, 2021, 11:58 PM CDT for Greeley County, Nance County, Valley County, Nebraska. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 30, 2021, 11:58 PM CDT (04:58 UTC)
Expired: Jul 31, 2021, 12:45 AM CDT
In force: 47 min
Issued by: NWS Hastings, NE

Counties Greeley County, NE, Nance County, NE, Valley County, NE

The radar

The Grand Island radar (KUEX), 138 km from the middle of the area, began a volume at 05:00 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 00:00Z, 5.0 hours before the alert went out and 169 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: 2669 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 3.4
Supercell composite: 19.5

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 30, 7:11 PM CDT, 4 hours 47 minutes earlier.

Area forecast discussion, Jul 30, 7:11 PM CDT, 4 hours 47 minutes before

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Hazardous weather outlook, Jul 30, 8:50 PM CDT, 3 hours 8 minutes before

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In the hours before

Special weather statement, Jul 30, 9:24 PM CDT, 2 hours 34 minutes before

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Special weather statement, Jul 30, 11:14 PM CDT, 44 minutes before

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Special weather statement, Jul 30, 11:58 PM CDT, 0 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
Jul 30, 11:14 PM CDT	Special Weather Statement	GID	Greeley	46 min

Nearby

Special Weather Statements in Nebraska, 2021 Every special weather statement 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.