Alert archive / Nebraska / Special Weather Statements in 2017

Special Weather Statement, NWS Hastings, NE

August 20, 2017York County, Nebraska

NWS Hastings, NE issued this special weather statement at Aug 20, 2017, 2:38 AM CDT for York County, Nebraska. It was in force for 22 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 20, 2017, 2:38 AM CDT (07:38 UTC)
Expired: Aug 20, 2017, 3:00 AM CDT
In force: 22 min
Issued by: NWS Hastings, NE

County York County, NE

The radar

The Grand Island radar (KUEX), 92 km from the middle of the area, began a volume at 07:42 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, 7.6 hours before the alert went out and 115 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: 505 J/kg
Mixed-layer CIN: -393 J/kg
Mixed-layer LCL: 1964 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 269 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 Aug 20, 1:15 AM CDT, 1 hour 23 minutes earlier.

Area forecast discussion, Aug 20, 1:15 AM CDT, 1 hour 23 minutes before

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Hazardous weather outlook, Aug 19, 9:56 PM CDT, 4 hours 42 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Hastings NE
956 PM CDT Sat Aug 19 2017

KSZ005>007-017>019-NEZ039>041-046>049-060>064-072>077-082>087-
201200-
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-
956 PM CDT Sat Aug 19 2017

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

.DAY ONE...Tonight.

A severe thunderstorm watch remains in effect until 1 AM for south
central Nebraska. The watch has been cancelled for north central
Kansas.

Scattered thunderstorms will continue over much of the area
tonight with the most widespread coverage expected across south
central Nebraska. A strong storm or two can't be ruled out in
north central Kansas but widespread severe weather appears
unlikely.

In south central Nebraska, the main hazards will be hail ranging
in size from quarters to golf balls, along with 60 mph winds from
the stronger storms. Not all areas will experience severe weather
however. Pockets of a quick 1 to 2 inches of rain are possible
too, and that could lead to short term flooding issues, especially
along and north of Interstate 80.

Thunderstorm intensity should diminish by 1 am through rainfall
may linger for a few more hours.

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

There is another chance for thunderstorms Sunday afternoon
through the overnight. Some storms could be severe with large
hail and damaging wind gusts.

Most, if not all, of the daytime on Monday should be dry, but
scattered to widespread thunderstorms are expected to develop
during the late afternoon and evening hours. Once again, some
strong to severe storms are possible with the best chance of
thunderstorms being during the evening and overnight hours
although a few thunderstorms could linger into Tuesday morning.

Slight chances for thunderstorms return to the forecast late
Thursday night into Friday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening. Please pass along
any severe weather reports to the National Weather Service.

&&

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

In the hours before

Special weather statement, Aug 20, 12:33 AM CDT, 2 hours 5 minutes before

Special Weather Statement
National Weather Service Hastings NE
1233 AM CDT SUN AUG 20 2017

NEZ040-041-047-200615-
Nance NE-Howard NE-Greeley NE-
1233 AM CDT SUN AUG 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GREELEY...
NORTHWESTERN NANCE AND NORTHEASTERN HOWARD COUNTIES UNTIL 115 AM
CDT...

At 1232 AM CDT, Doppler radar was tracking a strong thunderstorm near
Wolbach, or 26 miles southeast of Ord, moving northeast at 20 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Wolbach, Belgrade and Cushing.

A severe thunderstorm watch remains in effect until 100 AM CDT for
central Nebraska.

LAT...LON 4148 9829 4148 9810 4149 9810 4150 9805
      4139 9795 4130 9827 4139 9827 4139 9829
      4130 9829 4128 9841 4144 9867 4157 9829
TIME...MOT...LOC 0532Z 238DEG 19KT 4143 9847

Mangels

Special weather statement, Aug 20, 12:51 AM CDT, 1 hour 47 minutes before

Special Weather Statement
National Weather Service Hastings NE
1251 AM CDT SUN AUG 20 2017

NEZ064-076-077-200630-
Clay NE-York NE-Fillmore NE-
1251 AM CDT SUN AUG 20 2017

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CLAY...SOUTHERN YORK
AND FILLMORE COUNTIES UNTIL 130 AM CDT...

At 1251 AM CDT, Doppler radar was tracking a strong thunderstorm over
Grafton, or 17 miles south of York, moving east at 30 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Geneva, Sutton, Exeter, Fairmont, McCool Junction, Milligan, Grafton
and Lushton.

This includes Interstate 80 between mile markers 355 and 365.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.

&&

A severe thunderstorm watch remains in effect until 100 AM CDT for
south central and east central Nebraska.

LAT...LON 4045 9788 4070 9792 4070 9783 4075 9783
      4088 9737 4046 9737
TIME...MOT...LOC 0551Z 264DEG 27KT 4063 9769

Mangels

Special weather statement, Aug 20, 1:09 AM CDT, 1 hour 29 minutes before

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Special weather statement, Aug 20, 1:32 AM CDT, 1 hour 6 minutes before

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Special weather statement, Aug 20, 2:03 AM CDT, 35 minutes before

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Special weather statement, Aug 20, 2:38 AM 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
Aug 19, 9:52 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Dawson, Phelps	23 min
Aug 19, 10:02 PM CDT	Special Weather Statement	GID	Buffalo	28 min
Aug 19, 10:39 PM CDT	Special Weather Statement	GID	Sherman	51 min
Aug 19, 10:57 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Kearney	48 min
Aug 19, 11:02 PM CDT	Special Weather Statement	GID	Sherman	43 min
Aug 19, 11:11 PM CDT	Special Weather Statement	GID	Greeley, Howard	49 min
Aug 19, 11:19 PM CDT	Special Weather Statement	GID	Merrick, Polk	41 min
Aug 19, 11:27 PM CDT	Severe Thunderstorm Warning	GID	Hamilton, Merrick, Polk	48 min
Aug 19, 11:36 PM CDT	Severe Thunderstorm Warning	GID	Greeley, Howard, Merrick, Nance	24 min
Aug 19, 11:38 PM CDT	Areal Flood Warning	GID	Hamilton, Merrick, Polk, York	21 hr
Aug 19, 11:56 PM CDT	Special Weather Statement	GID	Merrick	49 min
Aug 19, 11:59 PM CDT	Severe Thunderstorm Warning	GID	Polk, York	31 min
Aug 20, 12:33 AM CDT	Special Weather Statement	GID	Nance	42 min
Aug 20, 12:51 AM CDT	Special Weather Statement	GID	Fillmore	39 min
Aug 20, 12:58 AM CDT	Severe Thunderstorm Warning	GID	Fillmore	17 min
Aug 20, 1:09 AM CDT	Special Weather Statement	GID	Clay	36 min
Aug 20, 1:32 AM CDT	Special Weather Statement	GID	Clay	28 min
Aug 20, 2:03 AM CDT	Special Weather Statement	GID	York	27 min
Aug 20, 4:32 AM CDT	Special Weather Statement	GID	York	43 min

Nearby

Special Weather Statements in Nebraska, 2017 Every special weather statement in 2017

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.