Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 31, NWS North Platte, NE

May 10, 2018Cherry County, Grant County, Sheridan County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 10, 2018, 5:56 PM MDT for Cherry County, Grant County, Sheridan County, Nebraska. It was in force for 49 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: May 10, 2018, 5:56 PM MDT (23:56 UTC)
Expired: May 10, 2018, 6:45 PM MDT
In force: 49 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 2.0 in
Wind: 50.0 mph

Counties Cherry County, NE, Grant County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 114 km from the middle of the area, began a volume at 23:59 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 1, 7:32 PM MST	Severe Thunderstorm Watch	SPC	135 days
May 10, 1:41 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.9 hours before the alert went out and 158 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1685 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 371 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

350 
WUUS53 KLBF 102356
SVRLBF
NEC031-075-161-110045-
/O.NEW.KLBF.SV.W.0031.180510T2356Z-180511T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
556 PM MDT THU MAY 10 2018

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cherry County in north central Nebraska...
  Northern Grant County in west central Nebraska...
  Southeastern Sheridan County in the Panhandle of Nebraska...

* Until 645 PM MDT

* At 555 PM MDT, a severe thunderstorm was located 8 miles east of
  Ellsworth, or 38 miles east of Alliance, moving northeast at 25
  mph.

  HAZARD...Two inch hail. 

  SOURCE...Radar indicated. 

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles. 

* Locations impacted include...
  Ashby, Watson Lake, Bingham, Duluth, Dipping Vat Meadow, Finnegan
  Lake, Intersection of Highway 61 and Survey Valley Road and Mother
  Lake.

This includes the following highways...
 Highway 2 between mile markers 123 and 143, and between mile markers
153 and 157.
 Highway 61 between mile markers 160 and 186.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4239 10172 4202 10155 4199 10207 4201 10207
      4201 10218 4220 10227
TIME...MOT...LOC 2355Z 239DEG 22KT 4210 10213 

HAIL...2.00IN
WIND...<50MPH
 
$$

JWS

3 follow-up statements

999 
WWUS53 KLBF 110015
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
615 PM MDT THU MAY 10 2018

NEC031-075-161-110045-
/O.CON.KLBF.SV.W.0031.000000T0000Z-180511T0045Z/
Cherry NE-Grant NE-Sheridan NE-
615 PM MDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR SOUTHWESTERN CHERRY...NORTHERN GRANT AND SOUTHEASTERN SHERIDAN
COUNTIES...

At 614 PM MDT, a severe thunderstorm was located 10 miles north of
Ashby, or 44 miles southeast of Rushville, moving northeast at 25
mph.

HAZARD...Two inch hail. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. 

Locations impacted include...
Ashby, Watson Lake, Bingham, Duluth, Dipping Vat Meadow, Finnegan
Lake, Intersection of Highway 61 and Survey Valley Road and Mother
Lake.

This includes the following highways...
 Highway 2 between mile markers 126 and 143, and between mile markers
153 and 157.
 Highway 61 between mile markers 160 and 186.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4239 10172 4202 10155 4199 10207 4201 10207
      4201 10215 4223 10217
TIME...MOT...LOC 0014Z 240DEG 23KT 4218 10200 

HAIL...2.00IN
WIND...<50MPH
 
$$

JWS

158 
WWUS53 KLBF 110026
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
626 PM MDT THU MAY 10 2018

NEC031-075-161-110045-
/O.CON.KLBF.SV.W.0031.000000T0000Z-180511T0045Z/
Cherry NE-Grant NE-Sheridan NE-
626 PM MDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR SOUTHWESTERN CHERRY...NORTHERN GRANT AND SOUTHEASTERN SHERIDAN
COUNTIES...

At 626 PM MDT, a severe thunderstorm was located 13 miles north of
Ashby, or 44 miles west of Mullen, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Ashby, Watson Lake, Bingham, Duluth, Dipping Vat Meadow, Finnegan
Lake, Intersection of Highway 61 and Survey Valley Road and Mother
Lake.

This includes the following highways...
 Highway 2 between mile markers 126 and 143, and between mile markers
153 and 157.
 Highway 61 between mile markers 160 and 186.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4239 10172 4202 10155 4199 10207 4201 10207
      4201 10215 4223 10217
TIME...MOT...LOC 0026Z 227DEG 24KT 4221 10188 

HAIL...1.00IN
WIND...60MPH
 
$$

JWS

816 
WWUS53 KLBF 110046
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
646 PM MDT THU MAY 10 2018

NEC031-075-161-110056-
/O.EXP.KLBF.SV.W.0031.000000T0000Z-180511T0045Z/
Cherry NE-Grant NE-Sheridan NE-
646 PM MDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHERRY...NORTHERN
GRANT AND SOUTHEASTERN SHERIDAN COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been allowed to expire.  However very 
heavy rain is still possible with this thunderstorm.

A severe thunderstorm watch remains in effect until 700 PM MDT for
the Panhandle of, north central and west central Nebraska.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
North Platte.

LAT...LON 4239 10172 4202 10155 4199 10207 4201 10207
      4201 10215 4223 10217
TIME...MOT...LOC 0046Z 239DEG 22KT 4227 10175 

$$

JWS

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 North Platte, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at May 10, 2:49 PM MDT, 3 hours 7 minutes earlier.

Area forecast discussion, May 10, 2:49 PM MDT, 3 hours 7 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
349 PM CDT Thu May 10 2018

.SHORT TERM...(This evening through Friday)
Issued at 334 PM CDT Thu May 10 2018

Models continue to agree that thunderstorms will congeal into an MCS
across the Sandhills into southwest NE early this evening, and then
track eastward across north central and central Nebraska mid to late
evening. Surface low pressure will be located across northeast
CO. early this evening, with a warm front extending east from the
low across west central and southwest Nebraska. This is the area
where low level moisture will be maximized with SFC dew points
near 60F. This is also the area of best instability and strongest
shear. Large hail and wind damage seem most likely in these areas
as the storms move through. In addition there is a small chance
that an isolated tornado may form, especially right near the warm
front where LCL levels may be lower due to the local higher
moisture content.

.LONG TERM...(Friday night through Thursday)
Issued at 334 PM CDT Thu May 10 2018

Unsettled weather will continue Friday into Saturday. A large upper
level low pressure system will remain established across the
western CONUS. We'll be on the eastern fringes, with a chance for
showers through Saturday. NAM does continue to indicate some
instability in the mid levels Friday night, and will include
thunder during this time. Otherwise the surface front will be well
to the south in KS, with an overcast stratus cloud deck and cool
temperatures locked in our area both Friday and Saturday. By
Sunday, expected some improvement as the upper level low weakens
across the Rockies. Breaks in the clouds should allow highs to
reach the mid and upper 60s.

The upper trough will reload and deepen next week across the
western U.S. This will continue southwest flow aloft across the
central plains. A stationary front will meander north and south
during this time, separating warm, humid Gulf air to the south and
cooler drier Canadian air to the north. This, with the upper
trough locate d to the west, should yield a good set up for at
least scattered thunderstorms at times. Highs mostly will be in
the mid to upper 70s, with perhaps some lower 80s.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1246 PM CDT Thu May 10 2018

Main forecast challenge involves timing of TSRA and coverage, as
well as stratus to follow. Short range models/CAMS indicate a
variety of possible outcomes with the TSRA but confidence is good
on at least SCT coverage of storms by this evening. Main complex
should track across the Sandhills but will affect both TAF sites
this evening. Stratus should develop quickly behind the MCS cold
pool and will remain in place for most of the day Friday.
Therefore a trend toward LIFR is in the forecast.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.
&&

SHORT TERM...Taylor
LONG TERM...Taylor
AVIATION...Stoppkotte

Hazardous weather outlook, May 10, 2:52 PM MDT, 3 hours 4 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
352 PM CDT Thu May 10 2018

NEZ004>010-022>029-035>038-056>059-069>071-094-112100-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-
Grant-Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-
Logan-Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
352 PM CDT Thu May 10 2018 /252 PM MDT Thu May 10 2018/

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

.DAY ONE...TONIGHT.

Severe thunderstorms capable of large hail and wind damage are
expected late this afternoon and early evening across western
Nebraska. The risk of severe weather will spread east into north
central and central Nebraska this evening.

Storm activity will develop across the Panhandle late this
afternoon. The thunderstorms are expected to become numerous as
they move east through western Nebraska early this evening and
later across north central Nebraska in central Nebraska.

Large hail is the main threat late this afternoon and early this
evening across the Panhandle and western Nebraska. Then more of a
wind damage threat is expected as storms move east across north
central and central Nebraska.

An isolated tornado could form late this afternoon or early this
evening, and this would be most likely to occur about 35 miles
north or south of a line from Oshkosh to North Platte.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

Thunderstorms are possible at times Friday through Wednesday. The
risk of organized severe weather appears low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed late this afternoon and tonight.

&&

Get your weather, hydrological, and climate information at
http://www.weather.gov/northplatte

Taylor

In the hours before

Local storm report, May 10, 3:47 PM MDT, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
447 PM CDT THU MAY 10 2018

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

0440 PM     HAIL             6 E GORDON              42.81N 102.09W
05/10/2018  E1.75 INCH       CHERRY             NE   PUBLIC

&&

JGOMEZ

Local storm report, May 10, 4:14 PM MDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
514 PM CDT THU MAY 10 2018

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

0511 PM     HAIL             22 SE GORDON            42.58N 101.90W
05/10/2018  E1.00 INCH       CHERRY             NE   PUBLIC

&&

JGOMEZ

Special weather statement, May 10, 4:15 PM MDT, 1 hour 41 minutes before

Special Weather Statement
National Weather Service North Platte NE
415 PM MDT THU MAY 10 2018

NEZ022-056-102300-
Deuel NE-Garden NE-
415 PM MDT THU MAY 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN GARDEN AND NORTHERN
DEUEL COUNTIES UNTIL 500 PM MDT...

At 415 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Lodgepole, or 14 miles northwest of Chappell, moving
northeast at 40 mph.

Nickel size hail will be possible with this storm.

This strong thunderstorm will be near...
  Oshkosh around 445 PM MDT.
  Lewellen around 455 PM MDT.

Other locations impacted by this storm include Ash Hollow State
Historical Park, Bluewater Battlefield State Historical Park, Mount
Vernon, Windlass Hill, Intersection of Highway 27 and 9 Mile Road and
Sugar Loaf Hill.

This includes Highway 92 between mile markers 115 and 117.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 700 PM MDT for
the Panhandle of Nebraska.

LAT...LON 4146 10264 4169 10199 4142 10201 4140 10208
      4119 10209 4113 10261 4139 10261 4140 10264
TIME...MOT...LOC 2215Z 241DEG 34KT 4126 10263

Taylor

Local storm report, May 10, 5:29 PM MDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
629 PM CDT THU MAY 10 2018

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

0613 PM     HAIL             2 E GORDON              42.81N 102.16W
05/10/2018  M1.00 INCH       SHERIDAN           NE   TRAINED SPOTTER

&&

ET

Local storm report, May 10, 5:33 PM MDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
633 PM CDT THU MAY 10 2018

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

0610 PM     HAIL             18 ESE LAKESIDE         41.96N 102.14W
05/10/2018  E1.75 INCH       GARDEN             NE   PUBLIC

            GOLF BALL SIZE HAIL AND 40 TO 50 MPH WINDS.

&&

JGOMEZ

Local storm report, May 10, 5:47 PM MDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
647 PM CDT THU MAY 10 2018

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

0635 PM     HEAVY RAIN       GORDON                  42.81N 102.20W
05/10/2018  E0.00 INCH       SHERIDAN           NE   PUBLIC

            HEAVY RAIN, STREET FLOODING IN TOWN.

&&

JGOMEZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 3:34 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	41 min
May 10, 3:37 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	38 min
May 10, 4:13 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	47 min
May 10, 4:15 PM MDT	Special Weather Statement	LBF	Garden	45 min
May 10, 4:25 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	50 min
May 10, 4:25 PM MDT	Severe Thunderstorm Warning	LBF	Garden	50 min
May 10, 4:28 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	47 min
May 10, 4:41 PM MDT	Severe Thunderstorm Warning	LBF	Garden	35 min
May 10, 4:50 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	40 min
May 10, 4:57 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Grant, Sheridan	48 min
May 10, 4:58 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	47 min
May 10, 5:08 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	52 min
May 10, 5:22 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Grant, Sheridan	38 min
May 10, 5:29 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	46 min
May 10, 5:40 PM MDT	Severe Thunderstorm Warning	LBF	Garden	50 min
May 10, 5:50 PM MDT	Areal Flood Advisory	LBF	Cherry, Sheridan	3 hr

Nearby

Severe Thunderstorm Warnings in Nebraska, 2018 Every 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.