Alert archive / Nebraska / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 154, NWS North Platte, NE

July 2, 20204 counties in Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 2, 2020, 4:18 PM MDT for 4 counties in Nebraska. It was in force for 57 min. 2 reports 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: Jul 2, 2020, 4:18 PM MDT (22:18 UTC)
Expired: Jul 2, 2020, 5:15 PM MDT
In force: 57 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Arthur County, NE, Keith County, NE, Lincoln County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 135 km from the middle of the area, began a volume at 22:21 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
Jul 2, 4:26 PM MDT	HAIL 1.25	Madrid, NE
Jul 2, 4:51 PM MDT	HAIL 1.5	3 Nne Roscoe, NE	FREQUENT MARBLE SIZE HAIL WITH OCCASIONAL PING PONG SIZE. SPOTTER ALSO REPORTED ESTIMATED 60 MPH WINDS.

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 2 storm reports to this severe thunderstorm warning; the first came 8 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
Jul 2, 1:58 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 10.3 hours before the alert went out and 80 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: 1124 J/kg
Mixed-layer CIN: -248 J/kg
Mixed-layer LCL: 1133 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

517 
WUUS53 KLBF 022218
SVRLBF
NEC005-101-111-135-022315-
/O.NEW.KLBF.SV.W.0154.200702T2218Z-200702T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
518 PM CDT Thu Jul 2 2020

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southeastern Arthur County in west central Nebraska...
  Eastern Perkins County in southwestern Nebraska...
  Keith County in southwestern Nebraska...
  Southwestern Lincoln County in southwestern Nebraska...

* Until 615 PM CDT/515 PM MDT/.

* At 518 PM CDT/418 PM MDT/, severe thunderstorms were located along
  a line extending from Kingsley Dam to 11 miles south of Roscoe to 8
  miles southeast of Madrid, moving northeast at 25 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...
  Ogallala, Paxton, Wallace, Madrid, Elsie, Sarben, Lemoyne,
  Keystone, Roscoe, Kingsley Dam, Grainton, Nevens, Broganville and
  Big Bald Hill.

This includes the following highways...
 Highway 61 between mile markers 82 and 111.
 Highway 92 between mile markers 131 and 138.
 Interstate 80 in Nebraska between mile markers 125 and 153.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 4071 10161 4089 10165 4137 10188 4147 10152
      4122 10124 4070 10109 4070 10160
TIME...MOT...LOC 2218Z 219DEG 20KT 4122 10166 4098 10154 4074 10148 

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

Kulik

2 follow-up statements

490 
WWUS53 KLBF 022243
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
543 PM CDT Thu Jul 2 2020

NEC005-101-111-135-022315-
/O.CON.KLBF.SV.W.0154.000000T0000Z-200702T2315Z/
Arthur NE-Perkins NE-Keith NE-Lincoln NE-
543 PM CDT Thu Jul 2 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM
CDT/515 PM MDT/ FOR SOUTH CENTRAL ARTHUR...NORTHEASTERN PERKINS...
EASTERN KEITH AND WEST CENTRAL LINCOLN COUNTIES...

At 543 PM CDT/443 PM MDT/, severe thunderstorms were located along a
line extending from near Keystone to near Paxton to near Elsie,
moving northeast at 15 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...
Paxton, Wallace, Madrid, Elsie, Keystone, Sarben, Roscoe, Kingsley
Dam, Big Bald Hill, Grainton, Nevens and Broganville.

This includes the following highways...
 Highway 61 between mile markers 93 and 109.
 Highway 92 near mile marker 138.
 Interstate 80 in Nebraska between mile markers 130 and 153.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 4097 10159 4138 10177 4145 10150 4122 10124
      4084 10113 4078 10151
TIME...MOT...LOC 2243Z 212DEG 12KT 4128 10158 4108 10141 4087 10132 

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

Kulik

703 
WWUS53 KLBF 022257
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
457 PM MDT Thu Jul 2 2020

NEC111-135-022306-
/O.CAN.KLBF.SV.W.0154.000000T0000Z-200702T2315Z/
Perkins NE-Lincoln NE-
457 PM MDT Thu Jul 2 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PERKINS AND WEST
CENTRAL LINCOLN COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been cancelled.

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

LAT...LON 4138 10177 4145 10150 4124 10126 4110 10127
      4100 10148 4101 10151
TIME...MOT...LOC 2256Z 218DEG 24KT 4117 10149 

$$

NEC005-101-022315-
/O.CON.KLBF.SV.W.0154.000000T0000Z-200702T2315Z/
Arthur NE-Keith NE-
457 PM MDT Thu Jul 2 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM MDT
FOR SOUTH CENTRAL ARTHUR AND EASTERN KEITH COUNTIES...

At 456 PM MDT, a severe thunderstorm was located near Keystone, or 12
miles east of Ogallala, moving northeast at 25 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...
Paxton, Sarben, Keystone, Big Bald Hill, Nevens and Broganville. 

This includes the following highways...
 Highway 61 between mile markers 105 and 109.
 Interstate 80 in Nebraska between mile markers 134 and 150.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

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

&&

LAT...LON 4138 10177 4145 10150 4124 10126 4110 10127
      4100 10148 4101 10151
TIME...MOT...LOC 2256Z 218DEG 24KT 4117 10149 

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

Kulik

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 Jul 2, 2:16 PM MDT, 2 hours 2 minutes earlier.

Area forecast discussion, Jul 2, 2:16 PM MDT, 2 hours 2 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
316 PM CDT Thu Jul 2 2020

.SHORT TERM...(This evening through Friday night)
Issued at 308 PM CDT Thu Jul 2 2020

The main concern in the short term is with thunderstorm development
late afternoon into evening.  A surface trof will move into the area
late afternoon and evening with thunderstorms expected to develop
across the Panhandle and northeast Colorado and move into the
western and southwest Nebraska. Severe storms will be possible with
the main hazards being large hail and strong winds. The area of
greatest threat for severe thunderstorms looks to be across
southwest Nebraska. CAPE values will be 3500 to around 5000 J/kg
across much of the forecast area. 0-6KM shear is good with values
around 25 to 30 across southwest Nebraska and a little less across
the Sandhills with values around 20 to 25 kts. Thunderstorm activity
is expected to diminish after midnight.

Overnight temperatures in western Nebraska will be in the low 60s
and will range into the upper 60s in northeast Nebraska. Trended
temperaturesto cooler guidance as they are expected to be lower
than previously anticipated due to a lack of widespread
cloudiness. There is decent low level moisture tonight with dew
points reaching the upper 60s in north central Nebraska.

For Friday, slight thunderstorm chances will be possible Friday
afternoon into Friday evening, at this time it does not look like
severe thunderstorms will be possible. High temperatures for
Friday are expected to be 5 to 10 degrees above normal with
temperatures in the low to mid 90s.

.LONG TERM...(Saturday through Thursday)
Issued at 308 PM CDT Thu Jul 2 2020

The upper level ridge pattern will remain in place over the weekend
and early next week bringing southwesterly upper level flow. Dew
points will generally remain in the 60s over the weekend but drop to
the 50s early next week. Thunderstorm activity will remain a
possibility each day during the afternoon with the greatest chances
on Sunday and Monday. Temperatures in the 90s are expected through
the weekend and early next week. The highest temperatures could
reach 100 degrees in southwest Nebraska on Wednesday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 110 PM CDT Thu Jul 2 2020

The main aviation concern will be the chance of thunderstorms across
much of western and north central Nebraska. Thunderstorms are
expected to develop across northwest Colorado and the western
Panhandle by late afternoon. Thunderstorms will then move eastward
throughout the evening. The best timing for thunderstorms to impact
both terminals will be between 00Z and 06Z. Large hail and erratic
strong winds will be possible in these thunderstorms. Quiet weather
will then return through Friday morning.

&&

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

SHORT TERM...Gomez/Meltzer
LONG TERM...Gomez/Meltzer
AVIATION...Kulik

Hazardous weather outlook, Jul 2, 2:12 PM MDT, 2 hours 6 minutes before

Hazardous Weather Outlook
National Weather Service North Platte NE
312 PM CDT Thu Jul 2 2020

NEZ004>010-022>029-035>038-056>059-069>071-094-032015-
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-
312 PM CDT Thu Jul 2 2020 /212 PM MDT Thu Jul 2 2020/

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

.DAY ONE...TONIGHT.

Scattered thunderstorms are possible across western Nebraska late this
afternoon into evening. A few storms will be capable of large
hail, gusty winds, frequent lightning, and brief heavy rainfall.
The greatest risk of a strong or severe storm is generally across
southwest Nebraska this evening.

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

Additional thunderstorm chances exist Friday afternoon and
evening across much of western and central Nebraska. The threat
of severe weather is low.

A marginal risk of severe storms is possible on Saturday across
the outlook area. Large hail and gusty winds are the primary
threat.

Thunderstorm chances remain through the weekend and into early
next week. At this time, the threat for organized severe weather
is low.

.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

In the hours before

Special weather statement, Jul 2, 3:39 PM MDT, 39 minutes before

Special Weather Statement
National Weather Service North Platte NE
439 PM CDT Thu Jul 2 2020

NEZ058-069-070-022230-
Chase NE-Hayes NE-Perkins NE-
439 PM CDT Thu Jul 2 2020

...SPECIAL WEATHER STATEMENT...

At 438 PM CDT/338 PM MDT/, Doppler radar was tracking a strong
thunderstorm near Champion, or 8 miles southwest of Imperial, moving
east at 25 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Imperial, Wauneta, Enders, Enders Reservoir State Recreation Area,
Champion, Crete, Center Dam Campground, Wanamaker State Wildfire
Management Area, Area A Campground and Church Grove Campground.

This includes Highway 61 between mile markers 25 and 47.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT/900
PM MDT/ for southwestern Nebraska.

LAT...LON 4035 10184 4052 10189 4070 10135 4035 10134
TIME...MOT...LOC 2138Z 258DEG 20KT 4045 10177

Kulik

Local storm report, Jul 2, 4:07 PM MDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
507 PM CDT THU JUL 2 2020

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

0450 PM     HAIL             2 SSW CHAMPION          40.44N 101.72W
07/02/2020  E1.50 INCH       CHASE              NE   PUBLIC

&&

CBROWN

Local storm report, Jul 2, 4:09 PM MDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
509 PM CDT THU JUL 2 2020

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

0502 PM     TSTM WND GST     1 ENE IMPERIAL          40.52N 101.62W
07/02/2020  M60 MPH          CHASE              NE   ASOS

            ASOS STATION KIML IMPERIAL AIRPORT.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 3:39 PM MDT	Special Weather Statement	LBF	Chase	51 min
Jul 2, 3:48 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Hayes	42 min
Jul 2, 4:07 PM MDT	Severe Thunderstorm Warning	LBF	Chase	23 min
Jul 2, 5:11 PM MDT	Special Weather Statement	LBF	Keith	49 min
Jul 2, 5:27 PM MDT	Special Weather Statement	LBF	Hayes	48 min
Jul 2, 5:55 PM MDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes, Lincoln	65 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.