Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 101, NWS Hastings, NE

June 30, 2020Merrick County, Nance County, Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jun 30, 2020, 10:14 PM CDT for Merrick County, Nance County, Nebraska. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 30, 2020, 10:14 PM CDT (03:14 UTC)
Expired: Jun 30, 2020, 11:00 PM CDT
In force: 46 min
Issued by: NWS Hastings, NE
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Merrick County, NE, Nance County, NE

The radar

The Grand Island radar (KUEX), 113 km from the middle of the area, began a volume at 03:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 30, 6:34 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.2 hours before the alert went out and 137 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: 3121 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 59 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 30, 6:40 PM CDT, 3 hours 34 minutes earlier.

Area forecast discussion, Jun 30, 6:40 PM CDT, 3 hours 34 minutes before

AREA FORECAST DISCUSSION
National Weather Service Hastings NE
640 PM CDT Tue Jun 30 2020

.SHORT TERM...(This evening through Wednesday)
Issued at 341 PM CDT Tue Jun 30 2020

Stratus has lifted and is becoming even more like stratocumulus or
even cumulus. On satellite, the individual cells are showing up. The
cold front is just to the west of the forecast area.

Through the remainder of the afternoon, the front is expected to
move into the western part of the forecast area. The upper level
wave moves into the area late this afternoon and into the evening.
The initial concern is the timing of the convection this afternoon
and evening. Most of the models indicate that the convection will
develop along and to the west of the front late this afternoon and
should be moving into the area probably between 6 and 7 pm this
evening. The main area of thunderstorms should be along and north of
Interstate 80, but there is a small chance for some thunderstorms
into north central Kansas. Late tonight, the thunderstorms are
expected to gradually move out of the area by morning.

On Wednesday, a surface high will slide through the area. Skies
should clear through the morning. Even after the cold front moves
through, the temperatures should warm into the lower 90s. The
humidity should remain high and the heat index values will reach the
mid 90s. It could feel fairly warm with winds only around 10 mph or
so.

.LONG TERM...(Wednesday night through Tuesday)
Issued at 341 PM CDT Tue Jun 30 2020

The main story for the next week will be a ridge that builds across
the area. Even with the ridge, there are a few, mainly weak, upper
level waves that move through the ridge. There are several periods
with small chances for showers and thunderstorms as is typical in a
summer pattern. Timing the waves is virtually impossible.

The other part of a typical summer pattern is that the ridge comes
with warmer temperatures. Expect that temperatures will be at or
just a little above normal for this time of year.

&&

.AVIATION...(For the 00Z KGRI/KEAR TAFS through 00Z Thursday)
Issued at 640 PM CDT Tue Jun 30 2020

Main concern for this TAF period will be in the next roughly 6
hours. A surface cold front will continue to push east through
both terminal sites in the next 1-3 hrs, bringing a sharp switch
in winds from south to northwesterly. Gusts around 20 MPH will be
possible. Along with the switch in winds, this front will be the
focus for thunderstorm development, but the overall coverage is a
bit uncertain the further south you go, so kept as a VCTS mention
at this time. Once the front/storm chances push through, VFR
conditions are currently forecast for the remainder of the TAF
period.

&&

.GID WATCHES/WARNINGS/ADVISORIES...
NE...NONE.
KS...NONE.
&&

SHORT TERM...JCB
LONG TERM...JCB
AVIATION...ADP

Hazardous weather outlook, Jun 30, 8:13 PM CDT, 2 hours 1 minute before

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In the hours before

Local storm report, Jun 30, 9:06 PM CDT, 1 hour 8 minutes before

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Local storm report, Jun 30, 9:13 PM CDT, 1 hour 1 minute before

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Local storm report, Jun 30, 9:30 PM CDT, 44 minutes before

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Special weather statement, Jun 30, 9:33 PM CDT, 41 minutes before

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Local storm report, Jun 30, 9:35 PM CDT, 39 minutes before

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Local storm report, Jun 30, 9:37 PM CDT, 37 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
Jun 30, 7:20 PM CDT	Special Weather Statement	GID	Dawson	25 min
Jun 30, 7:51 PM CDT	Special Weather Statement	GID	Buffalo	24 min
Jun 30, 7:59 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Dawson	31 min
Jun 30, 8:20 PM CDT	Special Weather Statement	GID	Sherman	40 min
Jun 30, 8:22 PM CDT	Special Weather Statement	GID	Howard	38 min
Jun 30, 8:34 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Hall, Howard, Sherman	41 min
Jun 30, 8:54 PM CDT	Special Weather Statement	GID	Greeley	51 min
Jun 30, 9:11 PM CDT	Severe Thunderstorm Warning	GID	Hall, Hamilton, Howard, Merrick, Nance	49 min
Jun 30, 9:33 PM CDT	Special Weather Statement	GID	Nance	42 min
Jun 30, 9:48 PM CDT	Severe Thunderstorm Warning	GID	Hall, Hamilton, Howard, Merrick, Polk, York	57 min
Jun 30, 9:56 PM CDT	Severe Thunderstorm Warning	GID	Adams, Clay, Hall, Hamilton	64 min
Jun 30, 10:35 PM CDT	Special Weather Statement	GID	Polk, York	40 min
Jun 30, 10:47 PM CDT	Severe Thunderstorm Warning	GID	Clay, Fillmore, Hamilton, York	43 min
Jun 30, 11:23 PM CDT	Special Weather Statement	GID	Fillmore, York	52 min
Jul 1, 12:10 AM CDT	Special Weather Statement	GID	York	35 min
Jul 1, 1:12 AM CDT	Special Weather Statement	GID	Greeley	33 min
Jul 1, 1:48 AM CDT	Special Weather Statement	GID	York	27 min
Jul 1, 2:31 AM CDT	Special Weather Statement	GID	Polk	44 min
Jul 1, 3:18 AM CDT	Special Weather Statement	GID	Polk	42 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020 Every severe thunderstorm warning in 2020

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.