Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS Hastings, NE

April 6, 2021Thayer County, Nebraska

NWS Hastings, NE issued this special weather statement at Apr 6, 2021, 11:28 PM CDT for Thayer 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
Apr 6, 2021, 11:28 PM CDT (04:28 UTC)
Expired
Apr 7, 2021, 12:15 AM CDT
In force
47 min
Issued by
NWS Hastings, NE

County Thayer County, NE

The radar

The Grand Island radar (KUEX), 68 km from the middle of the area, began a volume at 04:30 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, 4.5 hours before the alert went out and 161 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 00:00Z on 2021-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 337 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 00:00Z on 2021-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -55 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
337 J/kg
Mixed-layer CIN
-220 J/kg
Mixed-layer LCL
1216 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-55 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Apr 6, 6:30 PM CDT, 4 hours 58 minutes earlier.

Area forecast discussion, Apr 6, 6:30 PM CDT, 4 hours 58 minutes before
AREA FORECAST DISCUSSION
National Weather Service Hastings NE
630 PM CDT Tue Apr 6 2021

.DISCUSSION...(This evening through Tuesday)
Issued at 359 PM CDT Tue Apr 6 2021

Right now the main focus is monitoring conditions over the next few
hours with convection expected to begin to develop along and ahead
of the sfc cold front here shortly. The front has been rather slow
to progress so far today with the triple point generally over far
southwest NE currently (though the dry line is essentially
collocated with the front at this point). Plenty of CU has
developed across the entire area today and has played a role in
keeping things strongly capped so far today. Strong to severe
storms are expected to develop rapidly if the cap breaks...with
around 2,000 j/k of CAPE (mainly over SW portions of the area) and
40-50 kts of effective shear, the main severe threats would be
large hail and damaging winds, but a weak tornado is not out of
the question. While the cap is most likely to break in the western
portions of the area, the eastern areas will have a much harder
time and are likely to stay capped longer and we could see the
severe threat decrease rapidly after midnight tonight. Going
forward, the front looks to continue to slowly inch eastward
overnight bringing gusty winds as well as continuing showers and
thunderstorms.

Behind the front precip chances become more synoptically driven with
light to moderate wraparound precip expected through most of the day
tomorrow. Overall tomorrow is going to be a rather wet and dreary
day with highs expected to only be in the 40s with gusty
northwest winds. Thankfully this won't las too long as conditions
begin to dry out on Thursday and highs rebound back up into the
upper 50s and into the 60s.

To be honest, not a lot of time was spent on the long term
sections of the forecast today. More time was devoted to parsing
out the details of today's anticipated severe weather. The
long term can best be characterized as a series of upper level
waves that moves through and brings more periodic chances for
showers and potentially some thunderstorms. At the upper levels
the current closed low is expected to pass through KS by Thursday
afternoon and deepen as it goes. Behind this current low we will
see brief but collapsing ridging as we enter mainly northwest flow
ahead of the next trof that begins to descend over western MT by
around 00z Friday. As this new trof deepens and pushes eastward, a
new closed low is expected to form Friday afternoon around the
NE,SD,WY border. This low is also expected to deepen as it looks
to swing right through the center of NE by around 00z Saturday.
Then we look to be in something of a "lather, rinse, repeat"
situation where the low migrates east, brief ridging takes over
ahead of another trof descending over MT. While these can appear
to be fairly similar patterns, the devil will be in the details as
usual and confidence in the outer periods is not the greatest
right now.

&&

.AVIATION...(For the 00Z KGRI/KEAR TAFS through 00Z Thursday)
Issued at 610 PM CDT Tue Apr 6 2021

A line of TSRAs is developing to the west and expected to impact
the terminals between 07/01-07/04Z. There will likely be some
gusty winds with the initial passage...gusting 40-45 KTs...along
with the potential for heavy rain...hail and MVFR CIGS. Once this
front/line moves through...CIGS will continue to gradually lower
to IFR levels overnight...with with -SHRAs or VCSHs through much
of the day on Wednesday...along with strong northwesterly winds
gusting to near 40 KTS during the afternoon hours.

&&

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

DISCUSSION...Shawkey
AVIATION...Rossi
Hazardous weather outlook, Apr 6, 8:52 PM CDT, 2 hours 36 minutes before
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In the hours before

Local storm report, Apr 6, 8:27 PM CDT, 3 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
827 PM CDT TUE APR 6 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0758 PM     TSTM WND GST     4 N KEARNEY             40.75N 99.08W
04/06/2021  E60 MPH          BUFFALO            NE   EMERGENCY MNGR

            STRONG WINDS ALONG THE COLD FRONT ENHANCED
            BY THE CONVECTION UPSTREAM. ESTMATED A SWATH
            OF WINDS A HALF MILE WEST TO EAST WITH THE
            NORTHERN EDGE NEAR GLENWOOD CORNERS.

&&

JMBW
Local storm report, Apr 6, 8:35 PM CDT, 2 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HASTINGS NE
835 PM CDT TUE APR 6 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0835 PM     HAIL             1 W BURR OAK            39.87N 98.32W
04/06/2021  M0.88 INCH       JEWELL             KS   TRAINED SPOTTER

&&
Special weather statement, Apr 6, 8:39 PM CDT, 2 hours 49 minutes before
Special Weather Statement
National Weather Service Hastings NE
839 PM CDT Tue Apr 6 2021

KSZ019-070230-
Mitchell KS-
839 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR MITCHELL COUNTY UNTIL 930 PM
CDT...

At 839 PM CDT, Doppler radar was tracking a strong thunderstorm over
Victor, or 15 miles southwest of Beloit, moving northeast at 40 mph.

Wind gusts of 50 to 55 mph will be possible with this storm.

Locations impacted include...
Beloit, Asherville, Simpson, Hunter, Scottsville and Victor.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
north central Kansas.

LAT...LON 3924 9849 3957 9824 3957 9793 3922 9793
      3922 9849
TIME...MOT...LOC 0139Z 217DEG 37KT 3929 9829

Heinlein
Special weather statement, Apr 6, 8:45 PM CDT, 2 hours 43 minutes before
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Local storm report, Apr 6, 9:15 PM CDT, 2 hours 13 minutes before
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Special weather statement, Apr 6, 11:28 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 7:00 PM CDTSevere Thunderstorm WarningGIDDawson30 min
Apr 6, 7:06 PM CDTSevere Thunderstorm WarningGIDFranklin, Webster15 min
Apr 6, 7:29 PM CDTSevere Thunderstorm WarningGIDBuffalo, Dawson20 min
Apr 6, 7:40 PM CDTSpecial Weather StatementGIDSherman35 min
Apr 6, 7:52 PM CDTSpecial Weather StatementGIDBuffalo23 min
Apr 6, 8:04 PM CDTSpecial Weather StatementGIDHoward, Kearney41 min
Apr 6, 8:15 PM CDTSpecial Weather StatementGIDBuffalo, Sherman, Valley30 min
Apr 6, 8:45 PM CDTSpecial Weather StatementGIDNuckolls45 min
Apr 6, 7:14 PM CDTSevere Thunderstorm WarningGIDOsborne, Smith46 min
Apr 6, 7:59 PM CDTSpecial Weather StatementGIDSmith46 min
Apr 6, 8:11 PM CDTSevere Thunderstorm WarningGIDJewell, Smith49 min
Apr 6, 8:39 PM CDTSpecial Weather StatementGIDMitchell51 min

Nearby

Special Weather Statements in Nebraska, 2021Every 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.