Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 155, NWS Hastings, NE

June 30, 20184 counties in Nebraska

NWS Hastings, NE issued this severe thunderstorm warning at Jun 30, 2018, 5:49 PM CDT for 4 counties in Nebraska. It was in force for 26 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, 2018, 5:49 PM CDT (22:49 UTC)
Expired
Jun 30, 2018, 6:15 PM CDT
In force
26 min
Issued by
NWS Hastings, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
70.0 mph

Counties Adams County, NE, Clay County, NE, Nuckolls County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 15 km from the middle of the area, began a volume at 22:48 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.

IssuedProductOfficeLasted
Jun 30, 3:26 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 193 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-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2018-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2420 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2018-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2420 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
962 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-9 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.2

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, 3:29 PM CDT, 2 hours 20 minutes earlier.

Area forecast discussion, Jun 30, 3:29 PM CDT, 2 hours 20 minutes before
Area Forecast Discussion
National Weather Service Hastings NE
329 PM CDT Sat Jun 30 2018

.SHORT TERM...(This evening through Sunday)
Issued at 328 PM CDT Sat Jun 30 2018

A few thunderstorms have developed along a front that is nearly
stationary across far southern Nebraska this afternoon. Otherwise,
there are mostly cloudy skies for much of the area. Temperatures to
the south of the front are in the upper 80s to lower 90s and to the
north are mostly in the upper 70s and 80s.

The initial period will be the most interesting. The front should be
the focus of thunderstorms during the late afternoon hours. This
area has dew points around 70 degrees. These will be mainly wind and
hail as they affect the area this afternoon into the evening. Later,
mainly during the evening hours, an upper level wave will move into
the area and bring a line of thunderstorms into the area. These
should develop on the high plains and move into the area during the
evening. These storms will have mainly wind as the storms move
through. All of the storms should be through the forecast area by
morning.

A surface high moves into the area behind the thunderstorms and
clears things out for Sunday. The skies will become sunny, but
temperatures will be a little cooler with highs only in the 80s.
This will be cooler than much of the last week has been.

.LONG TERM...(Sunday night through Saturday)
Issued at 328 PM CDT Sat Jun 30 2018

Sunday night through Monday should be a dry period, with
temperatures warming up a little. The surface high moves to the east
Sunday night and by Monday the winds turn to the south and will help
temperatures warm a little.

The south winds will continue to bring in warmer temperatures
through Tuesday. There is a weak upper level wave that moves through
the area Monday night and there could be a few thunderstorms.

For the period Tuesday night through Saturday there will be an upper
level ridge across the central and eastern part of the CONUS. There
are a few mainly weak upper level waves that move around the ridge.
There could be a few thunderstorms, but they should be more on and
off and not very widespread. Temperatures will be fairly warm with
highs in the upper 80s and 90s across the area.

&&

.AVIATION...(For the 18Z KGRI/KEAR TAFS through 18Z Sunday)
Issued at 1224 PM CDT Sat Jun 30 2018

The MVFR ceilings should be relatively short lived and there could
be a little clearing during the afternoon, just enough to get more
thunderstorm development for later this afternoon and into the
evening. The thunderstorms should move out of the area late
tonight and clearing is expected behind the thunderstorms as a
surface high builds into the area.

&&

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

SHORT TERM...JCB
LONG TERM...JCB
AVIATION...JCB
Hazardous weather outlook, Jun 30, 3:39 PM CDT, 2 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Hastings NE
339 PM CDT Sat Jun 30 2018

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-
011200-
Phillips-Smith-Jewell-Rooks-Osborne-Mitchell-Valley-Greeley-Nance-
Sherman-Howard-Merrick-Polk-Dawson-Buffalo-Hall-Hamilton-York-
Gosper-Phelps-Kearney-Adams-Clay-Fillmore-Furnas-Harlan-Franklin-
Webster-Nuckolls-Thayer-
339 PM CDT Sat Jun 30 2018

This Hazardous Weather Outlook is for south central Nebraska and
portions of north central Kansas.

.DAY ONE...This Afternoon and Tonight.

Thunderstorms are possible through tonight. Thunderstorms are
developing along a front this afternoon. Severe thunderstorms are
possible with this activity with gusty winds to 60 mph and hail
to golf-ball size. A tornado or two are possible. Additional
thunderstorms will move into the area later this evening. Locally
heavy rainfall could cause some localized flooding.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There are additional chances for thunderstorms Monday night and
scattered chances again Thursday and Friday.

Heat will be on the increase again next week, with afternoon and
early evening heat index values reaching 100 degrees in parts of
the area Tuesday through Thursday, including Independence Day.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is expected through the evening.

&&

More information may be obtained at the following web page:
   https://www.weather.gov/hastings

In the hours before

Local storm report, Jun 30, 4:54 PM CDT, 55 minutes before
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Special weather statement, Jun 30, 5:00 PM CDT, 49 minutes before
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Local storm report, Jun 30, 5:03 PM CDT, 46 minutes before
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Special weather statement, Jun 30, 5:03 PM CDT, 46 minutes before
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Local storm report, Jun 30, 5:29 PM CDT, 20 minutes before
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Special weather statement, Jun 30, 5:33 PM CDT, 16 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 10:58 PM CDTSpecial Weather StatementGIDFurnas32 min
Jun 30, 4:01 AM CDTSpecial Weather StatementGIDGosper, Phelps44 min
Jun 30, 2:38 PM CDTSpecial Weather StatementGIDGosper37 min
Jun 30, 2:39 PM CDTSpecial Weather StatementGIDPhelps51 min
Jun 30, 2:41 PM CDTSevere Thunderstorm WarningGIDFurnas, Gosper34 min
Jun 30, 2:43 PM CDTSevere Thunderstorm WarningGIDHarlan, Phelps32 min
Jun 30, 3:06 PM CDTTornado WarningGIDFurnas, Gosper24 min
Jun 30, 3:13 PM CDTSevere Thunderstorm WarningGIDFurnas, Gosper, Harlan, Phelps32 min
Jun 30, 3:27 PM CDTTornado WarningGIDHarlan, Phelps33 min
Jun 30, 3:42 PM CDTSevere Thunderstorm WarningGIDFurnas, Gosper, Phelps33 min
Jun 30, 3:52 PM CDTSevere Thunderstorm WarningGIDKearney, Phelps38 min
Jun 30, 3:54 PM CDTTornado WarningGIDKearney, Phelps36 min
Jun 30, 4:10 PM CDTSevere Thunderstorm WarningGIDPhelps35 min
Jun 30, 4:24 PM CDTTornado WarningGIDKearney36 min
Jun 30, 4:26 PM CDTSevere Thunderstorm WarningGIDKearney, Phelps34 min
Jun 30, 4:36 PM CDTSevere Thunderstorm WarningGIDPhelps24 min
Jun 30, 4:57 PM CDTSevere Thunderstorm WarningGIDAdams, Kearney33 min
Jun 30, 5:00 PM CDTSpecial Weather StatementGIDPhelps30 min
Jun 30, 5:03 PM CDTSpecial Weather StatementGIDFillmore27 min
Jun 30, 5:23 PM CDTSevere Thunderstorm WarningGIDAdams, Clay, Kearney, Webster37 min
Jun 30, 5:33 PM CDTSpecial Weather StatementGIDFillmore42 min
Jun 30, 5:36 PM CDTSevere Thunderstorm WarningGIDFillmore24 min
Jun 30, 6:10 PM CDTSevere Thunderstorm WarningGIDClay, Nuckolls50 min
Jun 30, 6:18 PM CDTSpecial Weather StatementGIDPolk, York42 min
Jun 30, 6:23 PM CDTSevere Thunderstorm WarningGIDFillmore, York21 min
Jun 29, 11:29 PM CDTSpecial Weather StatementGIDPhillips46 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018Every severe thunderstorm warning in 2018

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.