Alert archive / Nebraska / Special Weather Statements in 2021

Special Weather Statement, NWS Hastings, NE

August 24, 2021Polk County, Nebraska

NWS Hastings, NE issued this special weather statement at Aug 24, 2021, 11:27 PM CDT for Polk County, Nebraska. It was in force for 48 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: Aug 24, 2021, 11:27 PM CDT (04:27 UTC)
Expired: Aug 25, 2021, 12:15 AM CDT
In force: 48 min
Issued by: NWS Hastings, NE
Hail: 0.88 in
Wind: 40

County Polk County, NE

The radar

The Omaha radar (KOAX), 103 km from the middle of the area, began a volume at 04:29 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 102 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: 3303 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1689 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 8.5

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 Aug 24, 6:37 PM CDT, 4 hours 50 minutes earlier.

Area forecast discussion, Aug 24, 6:37 PM CDT, 4 hours 50 minutes before

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Hazardous weather outlook, Aug 24, 8:28 PM CDT, 2 hours 59 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Hastings NE
828 PM CDT Tue Aug 24 2021

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-
251200-
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-
828 PM CDT Tue Aug 24 2021

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

.DAY ONE...Overnight.

Isolated to perhaps scattered thunderstorms are possible through
much of the night, mainly within Nebraska portions of the outlook
area, and particularly favoring counties along and north of
Interstate 80. While most storms should be fairly weak, a few
could be strong to perhaps marginally severe, with the main
threats being hail up to around quarter size, and wind gusts to
around 60 MPH.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Heat index values may reach or exceed 100 degrees across northern
Kansas and near Highway 81 in Nebraska both Wednesday and
Thursday afternoons.

Periodic chances for scattered thunderstorms continue Wednesday
night through Sunday night. There is a Marginal Risk for severe
storms Thursday afternoon and overnight. Thereafter, details
regarding thunderstorm severity remain limited.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report any possible instances of hail
or wind gusts over 50 MPH that might occur overnight

&&

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

Pfannkuch

In the hours before

Special weather statement, Aug 24, 11:27 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Hastings NE
1127 PM CDT Tue Aug 24 2021

NEZ041-048-049-250515-
Merrick NE-Nance NE-Polk NE-
1127 PM CDT Tue Aug 24 2021

...A strong thunderstorm will impact portions of northeastern Merrick
and Polk Counties through 1215 AM CDT...

At 1126 PM CDT, Doppler radar was tracking a strong thunderstorm near
Clarks, or 24 miles north of York, moving northeast at 30 mph.

HAZARD...Winds in excess of 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Silver Creek around 1140 PM CDT.
  Osceola around 1145 PM CDT.

Other locations in the path of this storm include Shelby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4109 9778 4129 9789 4139 9760 4133 9760
      4134 9757 4136 9752 4137 9745 4139 9737
      4115 9737
TIME...MOT...LOC 0426Z 246DEG 24KT 4121 9774

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

JCB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 10:34 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance, Polk	26 min
Aug 24, 10:48 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, Merrick, Polk	42 min
Aug 25, 2:11 AM CDT	Heat Advisory	GID	Fillmore, Nuckolls, Thayer	18 hr
Aug 25, 3:18 PM CDT	Heat Advisory	GID	Fillmore, Nuckolls, Polk, Thayer, York	29 hr

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.