Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 76, NWS North Platte, NE

June 7, 2020Cherry County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jun 7, 2020, 6:07 PM MDT for Cherry County, Nebraska. It was in force for 38 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: Jun 7, 2020, 6:07 PM MDT (00:07 UTC)
Expired: Jun 7, 2020, 6:45 PM MDT
In force: 38 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

County Cherry County, NE

The radar

The North Platte radar (KLNX), 110 km from the middle of the area, began a volume at 00:06 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
Jun 7, 6:20 PM MDT	HAIL 1.75	14 S Eli, NE	BROKEN WINDOWS ON SOUTH SIDE OF HOUSE DUE TO HAIL.

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 13 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
Jun 7, 2:31 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.1 hours before the alert went out and 190 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: 963 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 2797 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 325 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 11.0

Open this sounding in Storm Lab

The text

As transmitted.

831 
WUUS53 KLBF 080007
SVRLBF
NEC031-080045-
/O.NEW.KLBF.SV.W.0076.200608T0007Z-200608T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
607 PM MDT Sun Jun 7 2020

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cherry County in north central Nebraska...

* Until 645 PM MDT.

* At 607 PM MDT, a severe thunderstorm was located 7 miles southwest
  of Medicine Lake, or 35 miles east of Gordon, moving northeast at
  40 mph.

  HAZARD...Ping pong 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.

* Locations impacted include...
  Cody, Nenzel, Medicine Lake, Eli, Indian Hill, Cody Lake and
  Highway 61 crossing the Snake River.

This includes the following highways...
 Highway 20 between mile markers 147 and 167.
 Highway 61 between mile markers 200 and 201.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4255 10142 4256 10172 4300 10145 4299 10104
TIME...MOT...LOC 0007Z 206DEG 34KT 4264 10153 

HAIL...1.50IN
WIND...60MPH
 
$$

Snively

1 follow-up statement

927 
WWUS53 KLBF 080027
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
627 PM MDT Sun Jun 7 2020

NEC031-080045-
/O.CON.KLBF.SV.W.0076.000000T0000Z-200608T0045Z/
Cherry NE-
627 PM MDT Sun Jun 7 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR NORTH CENTRAL CHERRY COUNTY...

At 626 PM MDT, a severe thunderstorm was located near Medicine Lake,
or 31 miles southeast of Martin, moving northeast at 45 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.

Locations impacted include...
Cody, Nenzel, Medicine Lake, Eli and Cody Lake. 

This includes Highway 20 between mile markers 149 and 167.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4269 10130 4270 10156 4300 10141 4299 10104
TIME...MOT...LOC 0026Z 211DEG 39KT 4279 10140 

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

Snively

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 Jun 7, 5:23 PM MDT, 44 minutes earlier.

Area forecast discussion, Jun 7, 5:23 PM MDT, 44 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
623 PM CDT Sun Jun 7 2020

.UPDATE...
Issued at 351 PM CDT Sun Jun 7 2020

Wind gusts to around 60 miles per hour have occurred at Imperial,
North Platte and Broken Bow. This is about 10 mph faster than the
HRRR model predicted this morning. Strong gusts should continue to
sunset and a high wind warning is now in effect for parts of
southwest and central Nebraska.

&&

.SHORT TERM...(This evening through Monday night)
Issued at 327 PM CDT Sun Jun 7 2020

A reasonably strong cap is in place this afternoon across wrn and
ncntl Nebraska but a few of the CAMs indicate a brief but intense
period of storm development late this afternoon. With the loss of
daytime heating this evening, the cap will strengthen and the models
show the storms quickly dissipating. SPC asked for a 20z LBF upper
air sounding to determine the strength of the cap which would
dictate the potential for severe weather. If any of the vaulting
towers this afternoon can build down through the cap layer and tap
into the boundary layer moisture, 50kt winds at h500mb and MLCAPE
between 2500 and 3000J/KG would support supercells.

No other convection is expected tonight or Monday morning.

An anomalous upper low featuring -30C temperatures at h500mb has
moved into the Pacific Northwest. The upper low will move east
tonight and drive a Pacific cold front into cntl Nebraska Monday
afternoon. The front and the upper low will be the basis for a
combined severe weather/flood threat late Monday afternoon through
Tuesday morning affecting the eastern Sandhills, southwest and ncntl
Nebraska. Precipitable water in the models increases to between 1.5
and 2.0 inches supporting the heavy rain threat which will occur
along and north of the front. The models show about a 50 mile wide
swath of heavy rain behind the front Monday night with totals around
4 inches.

WPC suggested slow moving storms, warm cloud precipitation
processes, storm training and back building will contribute to the
flood threat Monday night. Along and ahead of the front, SPC
suggested a tornado threat late Monday afternoon and Monday evening.
Wind damage and large hail would be possible west or behind the
front. A flood watch is in place for Custer county Monday night.
Recent heavy rainfall in this area has pushed 3-hr flood guidance
below 2 inches in many areas.

The location of the front, which could be as far east as Norfolk to
McCook or as far west as Imperial to O'Neill, will dictate the
location of the tornado threats and there is about a 50 or 70 mile
spread in the models east and west with the location of the highest
rainfall amounts.

.LONG TERM...(Tuesday through Sunday)
Issued at 327 PM CDT Sun Jun 7 2020

An upper level trof will move across wrn and ncntl Nebraska
Tuesday. Moisture wrapped around a closed h700mb low moving through
Nebraska is the basis for ocassional showers throughout the day. The
h700mb low and the moisture will exit the region Tuesday night. Dry
weather is in place Wednesday through Saturday.

The models are in reasonably good agreement showing another upper
low/trof moving through the wrn U.S. next Sunday. This would be the
next chance for thunderstorm development.

&&

.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 623 PM CDT Sun Jun 7 2020

Wind is the primary aviation weather concern for western and north
central Nebraska. Strong southerly winds will continue to gust
frequently around 40 kts through sundown, then slowly decrease
overnight to where most gusts should subside by 08/12z. However,
low level wind shear conditions arise with a 55+ kt southerly jet
at 2kft. A cool front begins to work through the region Monday
morning, resulting in a wind shift to northwesterly and some gusts
above 20 kts again during the afternoon. Another concern,
primarily this evening, is scattered thunderstorms in the
panhandle and western Sandhills. Brief drops in cigs/visby, along
with erratic wind gusts, are possible at KGRN, KVTN, KTIF.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
High Wind Warning until 9 PM CDT /8 PM MDT/ this evening for
NEZ038-058-059-069>071.

Flood Watch from Monday evening through Tuesday morning for
NEZ038.

&&

UPDATE...CDC
SHORT TERM...CDC
LONG TERM...CDC
AVIATION...Snively

Hazardous weather outlook, Jun 7, 2:57 PM MDT, 3 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
357 PM CDT Sun Jun 7 2020

NEZ004>010-022>029-035>038-056>059-069>071-094-082100-
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-
357 PM CDT Sun Jun 7 2020 /257 PM MDT Sun Jun 7 2020/

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

.DAY ONE...TONIGHT.

Isolated to scattered severe thunderstorms are anticipated to
develop across parts of the Sandhills into northern Nebraska this
evening. Large hail and damaging winds are the main hazards. A
severe thunderstorm watch is in effect until 10 pm CT.

Winds will continue to remain strong through the rest of the
evening with gust of 45 mph or greater possible.

The combination of strong winds, low relative humidity and hot
temperatures through this evening will continue elevated to
Critical fire weather conditions across portions of the Nebraska
Panhandle into southwest Nebraska. For more detailed information
please refer to the latest Fire Weather Planning Forecast for more
details.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

Scattered thunderstorms are expected to develop Monday afternoon
and become numerous across north central Nebraska Monday evening.
Some storms could become severe and produce large hail and wind
damage. An isolated tornado may form and this would be most
likely
along a cold front draped across north central Nebraska.

Some storms may also produce locally heavy rainfall which could
cause flooding. A Flood watch has been posted for Custer county
Monday night through early Tuesday morning.

.SPOTTER INFORMATION STATEMENT...

Please relay any information about observed severe weather to the
NWS.

&&

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

Gomez

In the hours before

Local storm report, Jun 7, 4:13 PM MDT, 1 hour 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
513 PM CDT SUN JUN 7 2020

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

0300 PM     NON-TSTM WND DMG 10 S NORTH PLATTE       40.99N 100.77W
06/07/2020                   LINCOLN            NE   NWS EMPLOYEE

            4 INCH DIAMETER TREE BRANCH DOWN IN ESTIMATED 50 MPH WIND

&&

SMELTZER

Local storm report, Jun 7, 4:57 PM MDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
557 PM CDT SUN JUN 7 2020

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

0540 PM     NON-TSTM WND GST VALENTINE               42.87N 100.55W
06/07/2020  M60 MPH          CHERRY             NE   ASOS

&&

SNIVELY

Local storm report, Jun 7, 4:58 PM MDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
558 PM CDT SUN JUN 7 2020

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

0511 PM     NON-TSTM WND GST IMPERIAL                40.52N 101.64W
06/07/2020  M61 MPH          CHASE              NE   ASOS

&&

CBROWN

Local storm report, Jun 7, 5:58 PM MDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
658 PM CDT SUN JUN 7 2020

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

0625 PM     NON-TSTM WND GST VALENTINE               42.87N 100.55W
06/07/2020  M64 MPH          CHERRY             NE   ASOS

&&

JGOMEZ

Local storm report, Jun 7, 5:59 PM MDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
659 PM CDT SUN JUN 7 2020

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

0620 PM     NON-TSTM WND GST IMPERIAL                40.52N 101.64W
06/07/2020  M63 MPH          CHASE              NE   ASOS

&&

JGOMEZ

Special weather statement, Jun 7, 6:03 PM MDT, 4 minutes before

Special Weather Statement
National Weather Service North Platte NE
603 PM MDT Sun Jun 7 2020

NEZ094-080045-
Western Cherry NE-
603 PM MDT Sun Jun 7 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CHERRY COUNTY UNTIL
645 PM MDT...

At 603 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Cody to 23 miles southwest of Medicine
Lake. Movement was northeast at 40 mph.

Nickel size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Cody, Kilgore, Nenzel, Medicine Lake, Cody Lake, Highway 61 crossing
the Snake River, Eli, Round Lake, Indian Hill and Schoolhouse Lake.

This includes the following highways...
 Highway 20 between mile markers 146 and 174.
 Highway 61 between mile markers 189 and 207.

A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
north central Nebraska.

LAT...LON 4241 10145 4241 10192 4300 10146 4299 10091
TIME...MOT...LOC 0003Z 206DEG 34KT 4297 10121 4246 10172

Snively

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 6:03 PM MDT	Special Weather Statement	LBF	Cherry	42 min
Jun 7, 6:44 PM MDT	Severe Thunderstorm Warning	LBF	Cherry	46 min
Jun 7, 6:48 PM MDT	Special Weather Statement	LBF	Grant	42 min
Jun 8, 1:33 PM MDT	High Wind Warning	LBF	Arthur, Chase, Custer, Deuel, Frontier, Garden and 6 more	30 hr
Jun 8, 5:03 PM MDT	Severe Thunderstorm Warning	LBF	Custer, Lincoln, Logan	42 min
Jun 8, 5:04 PM MDT	Special Weather Statement	LBF	Blaine	41 min
Jun 8, 5:25 PM MDT	Special Weather Statement	LBF	Lincoln	50 min
Jun 8, 5:37 PM MDT	Special Weather Statement	LBF	Blaine, Rock	53 min
Jun 8, 5:38 PM MDT	Severe Thunderstorm Warning	LBF	Lincoln	52 min
Jun 8, 5:42 PM MDT	Severe Thunderstorm Warning	LBF	Blaine, Custer	48 min
Jun 8, 5:44 PM MDT	Special Weather Statement	LBF	Brown	46 min
Jun 8, 5:45 PM MDT	Special Weather Statement	LBF	Thomas	45 min
Jun 8, 5:54 PM MDT	Tornado Warning	LBF	Blaine, Custer	51 min
Jun 8, 5:56 PM MDT	Tornado Warning	LBF	Lincoln	49 min
Jun 8, 5:58 PM MDT	Severe Thunderstorm Warning	LBF	Brown, Rock	47 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2020 Every severe thunderstorm warning in 2020

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.