Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 36, NWS North Platte, NE

May 10, 2018Keith County, Perkins County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at May 10, 2018, 6:42 PM MDT for Keith County, Perkins County, Nebraska. It was in force for 48 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 10, 2018, 6:42 PM MDT (00:42 UTC)
Expired: May 10, 2018, 7:30 PM MDT
In force: 48 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Keith County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 138 km from the middle of the area, began a volume at 00:44 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.

What was reported inside it

Time	Report	Where	Remark
May 10, 7:27 PM MDT	HAIL 1.25	6 S Roscoe, NE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 45 minutes after it went out.

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
May 10, 1:41 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.7 hours before the alert went out and 90 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: 1050 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1982 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 446 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

As transmitted.

530 
WUUS53 KLBF 110042
SVRLBF
NEC101-135-110130-
/O.NEW.KLBF.SV.W.0036.180511T0042Z-180511T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
642 PM MDT THU MAY 10 2018

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northeastern Perkins County in southwestern Nebraska...
  Southern Keith County in southwestern Nebraska...

* Until 730 PM MDT

* At 642 PM MDT, a severe thunderstorm was located near Brule, or 7
  miles southwest of Ogallala, moving northeast at 20 mph.

  HAZARD...Golf ball size hail and 60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* This severe thunderstorm will be near, 
  Ogallala around 705 PM MDT. 
  Roscoe around 715 PM MDT. 
  Keystone around 725 PM MDT. 

Other locations impacted by this severe thunderstorm include
Broganville.

This includes the following highways...
 Highway 61 between mile markers 73 and 95.
 Interstate 80 in Nebraska between mile markers 117 and 143.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4092 10181 4107 10192 4130 10149 4092 10132
TIME...MOT...LOC 0042Z 241DEG 18KT 4104 10178 

HAIL...1.75IN
WIND...60MPH
 
$$

Taylor

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, 6:08 PM MDT, 34 minutes earlier.

Area forecast discussion, May 10, 6:08 PM MDT, 34 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
708 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 00Z TAFS through 00Z Friday evening)
Issued at 644 PM CDT Thu May 10 2018

Numerous thunderstorms developing across the eastern Panhandle
into the far western Sandhills. Storms are expected to continue
through the evening hours with movement east-northeast; storms
are anticipated to congeal and transition to clusters/line this
evening as well. Storms are expected to exit out of the local
forecast area during the small hours. Meanwhile, ceilings are
expected to deteriorate to low-end MVFR (less than 2 kft) to IFR
overnight with sub-VFR conditions continuing tomorrow.

&&

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

SHORT TERM...Taylor
LONG TERM...Taylor
AVIATION...ET

Hazardous weather outlook, May 10, 2:52 PM MDT, 3 hours 50 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, 5:29 PM MDT, 1 hour 13 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, 1 hour 9 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, 55 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

Local storm report, May 10, 5:58 PM MDT, 44 minutes before

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

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

0632 PM     HAIL             19 N ELLSWORTH          42.33N 102.29W
05/10/2018  E1.00 INCH       SHERIDAN           NE   PUBLIC

&&

JGOMEZ

Local storm report, May 10, 6:22 PM MDT, 20 minutes before

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

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

0702 PM     HAIL             12 NE OSHKOSH           41.53N 102.18W
05/10/2018  M1.75 INCH       GARDEN             NE   PUBLIC

&&

SJACOBS

Local storm report, May 10, 6:42 PM MDT, 0 minutes before

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

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

0739 PM     HAIL             4 ESE OSHKOSH           41.39N 102.27W
05/09/2018  M1.00 INCH       GARDEN             NE   TRAINED SPOTTER

            VIA SPOTTERNETWORK.ORG

&&

ET

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 6:00 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Perkins	45 min
May 10, 6:09 PM MDT	Severe Thunderstorm Warning	LBF	Garden	51 min
May 10, 6:11 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	28 min
May 10, 6:27 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Grant	48 min
May 10, 6:50 PM MDT	Areal Flood Advisory	LBF	Keith, Perkins	3 hr
May 10, 6:58 PM MDT	Severe Thunderstorm Warning	LBF	Arthur, Garden, Keith	47 min
May 10, 7:05 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	40 min
May 10, 7:16 PM MDT	Severe Thunderstorm Warning	LBF	Hooker, Logan, McPherson, Thomas	44 min
May 10, 7:29 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln, Perkins	46 min
May 10, 7:42 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	48 min
May 10, 7:47 PM MDT	Severe Thunderstorm Warning	LBF	Cherry, Logan, McPherson, Thomas	43 min
May 10, 8:12 PM MDT	Special Weather Statement	LBF	Lincoln	48 min
May 10, 8:25 PM MDT	Areal Flood Advisory	LBF	Perkins	3 hr
May 10, 8:28 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Perkins	47 min
May 10, 8:37 PM MDT	Special Weather Statement	LBF	Lincoln	53 min
May 10, 8:41 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	49 min
May 10, 8:57 PM MDT	Special Weather Statement	LBF	Custer	48 min
May 10, 9:05 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Lincoln	55 min
May 10, 9:09 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	51 min
May 10, 9:13 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Perkins	62 min
May 10, 9:20 PM MDT	Areal Flood Advisory	LBF	Lincoln, Perkins	3 hr
May 10, 9:44 PM MDT	Areal Flood Advisory	LBF	Keith	3 hr
May 10, 9:58 PM MDT	Severe Thunderstorm Warning	LBF	Custer	62 min
May 10, 10:01 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	29 min
May 10, 10:25 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	50 min
May 10, 10:30 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Perkins	45 min
May 10, 10:59 PM MDT	Severe Thunderstorm Warning	LBF	Custer	31 min
May 10, 11:12 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	48 min
May 10, 11:41 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Lincoln	49 min
May 10, 11:53 PM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	52 min
May 11, 12:44 AM MDT	Severe Thunderstorm Warning	LBF	Keith, Lincoln	46 min
May 11, 1:27 AM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan, McPherson	48 min
May 11, 2:12 AM MDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan	63 min
May 11, 3:05 AM MDT	Special Weather Statement	LBF	Hooker	55 min
May 11, 3:36 AM MDT	Special Weather Statement	LBF	Grant	39 min
May 11, 3:58 AM MDT	Special Weather Statement	LBF	Hooker	47 min
May 11, 4:14 AM MDT	Special Weather Statement	LBF	Grant	46 min
May 11, 4:18 AM MDT	Special Weather Statement	LBF	Thomas	27 min
May 11, 4:50 AM MDT	Special Weather Statement	LBF	Thomas	40 min
May 11, 4:56 AM MDT	Special Weather Statement	LBF	Cherry	49 min
May 11, 5:53 AM MDT	Special Weather Statement	LBF	Brown	52 min
May 11, 6:55 AM MDT	Special Weather Statement	LBF	Thomas	50 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.