Alert archive / Nebraska / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 241, NWS North Platte, NE

July 28, 2018Chase County, Nebraska

NWS North Platte, NE issued this severe thunderstorm warning at Jul 28, 2018, 9:09 PM MDT for Chase County, Nebraska. It was in force for 31 min. 3 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 28, 2018, 9:09 PM MDT (03:09 UTC)
Expired: Jul 28, 2018, 9:40 PM MDT
In force: 31 min
Issued by: NWS North Platte, NE
Area: Storm-based polygon
Hail: 2.5 in
Wind: 70.0 mph

County Chase County, NE

The radar

The Goodland radar (KGLD), 123 km from the middle of the area, began a volume at 03:10 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 28, 9:10 PM MDT	TSTM WND DMG	14 Wsw Imperial, NE	REPORT OF FAIRLY LARGE TREE BROKEN IN HALF
Jul 28, 9:10 PM MDT	TSTM WND GST 70	15 W Imperial, NE
Jul 28, 9:10 PM MDT	TSTM WND GST 75	14 Wsw Imperial, 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 3 storm reports to this severe thunderstorm warning; the first came 1 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 28, 5:40 PM MDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 131 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: 565 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1240 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

As transmitted.

732 
WUUS53 KLBF 290309
SVRLBF
NEC029-290400-
/O.NEW.KLBF.SV.W.0241.180729T0309Z-180729T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service North Platte NE
909 PM MDT SAT JUL 28 2018

The National Weather Service in North Platte has issued a

* Severe Thunderstorm Warning for...
  Southwestern Chase County in southwestern Nebraska...

* Until 1000 PM MDT.

* At 909 PM MDT, a severe thunderstorm was located 8 miles southeast
  of Lamar, or 14 miles west of Imperial, moving southeast at 35 mph.

  HAZARD...Tennis ball size hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Champion and Crete. 

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 4053 10205 4056 10173 4035 10157 4035 10205
TIME...MOT...LOC 0309Z 333DEG 29KT 4047 10191 

HAIL...2.50IN
WIND...70MPH
 
$$

JWS

1 follow-up statement

528 
WWUS53 KLBF 290340
SVSLBF

Severe Weather Statement
National Weather Service North Platte NE
940 PM MDT SAT JUL 28 2018

NEC029-290350-
/O.CAN.KLBF.SV.W.0241.000000T0000Z-180729T0400Z/
Chase NE-
940 PM MDT SAT JUL 28 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CHASE COUNTY IS
CANCELLED...
                
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 cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 100 AM MDT for
southwestern Nebraska.

LAT...LON 4053 10205 4056 10173 4035 10157 4035 10205
TIME...MOT...LOC 0339Z 333DEG 29KT 4024 10176 

$$

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 Jul 28, 5:31 PM MDT, 3 hours 38 minutes earlier.

Area forecast discussion, Jul 28, 5:31 PM MDT, 3 hours 38 minutes before

Area Forecast Discussion
National Weather Service North Platte NE
631 PM CDT Sat Jul 28 2018

.SHORT TERM...(This evening through Sunday)
Issued at 328 PM CDT Sat Jul 28 2018

Isolated thunderstorms have initiated north of Casper and Douglas
Wyoming this afternoon and are forecast to develop into a
thunderstorm cluster across the nrn and cntrl panhandle early this
evening and continue moving southeast through southwest Nebraska
late this evening. A belt of strong 500mb winds near 50 kts will
accompany this system and help to sustain the system tonight. The
presence of strong shear aloft and steep mid level lapse rates
upstream of the area will aid in the potential for supercell
thunderstorms in the panhandle and western sandhills early this
evening, upon which and enhanced risk for severe storms currently
exists. Further east, the system is likely to become elevated as
it congeals southeastward with a damaging wind and large hail
threat still expected, for west central and southwest Nebraska.
With a forward propagating system expected, heavy rainfall is a
threat with areas of 1 to 2 inches possible. Do not expect flash
flooding, although localized flooding could occur due to recent
rainfall. Mesoscale models have been consistent today for high
confidence of occurrence. The system should exit all but far
southeast zones by midnight. Chance for showers and a few
thunderstorms exit overnight, although models do indicate weak
subsidence behind the system to lessen redevelopment.

For Sunday, rain and thunderstorm chances continue as a series of
shortwaves move across Nebraska. Models suggest likely pops west
of a Cody through Broken Bow line by afternoon. Heavy rain is not
anticipated to be a major threat on Sunday. A few strong to
locally severe storms are possible, west of Cody through Callaway.

.LONG TERM...(Sunday night through Saturday)
Issued at 328 PM CDT Sat Jul 28 2018

Chances for showers and thunderstorms continue Sunday night as an
upper trough axis rotates south from nrn South Dakota to northern
Nebraska overnight. Ahead of this feature, a belt of 500mb winds
from 35 to 45 kts will drop southward out of the area overnight.
this will result in lessening chances overnight. Highest pops
during the evening across western and central areas from 40 to 50
percent. It appears the threat for any strong storms Sunday
evening should have shifted southwest of the area.

A strong upper level ridge will build across the western US on
Monday, as an upper trough develops southward from the western
Great Lakes. Still at least a sight chance for showers or a few
thunderstorms due to the influence from the upper trough to our
east. As the upper ridge builds eastward next week, dry weather,
and warming temperatures can be expected. Highs Monday, to range
in the upper 70s, warming to the upper 80s to lower 90s by Friday
and Saturday.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 630 PM CDT Sat Jul 28 2018

Timing and extent of thunderstorms will again be the forecast
challenge for the next 24 hrs.

Expecting a couple areas of development, one being the north
central and the other being the southwest. In either case, severe
storms are possible but have stayed with MVFR cigs/vis through the
evening and overnight. Some possibility that stratus will drop to
IFR by morning but confidence is not high due to uncertainty of
coverage and duration of TSRA tonight.

&&

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

SHORT TERM...Roberg
LONG TERM...Roberg
AVIATION...Stoppkotte

Hazardous weather outlook, Jul 28, 2:22 PM MDT, 6 hours 47 minutes before

Hazardous Weather Outlook...CORRECTED
National Weather Service North Platte NE
322 PM CDT Sat Jul 28 2018

NEZ004>010-022>029-035>038-056>059-069>071-094-292015-
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-
322 PM CDT Sat Jul 28 2018 /222 PM MDT Sat Jul 28 2018/

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

.DAY ONE...TONIGHT.

Scattered severe thunderstorms are likely this evening. The area
of concern is generally along and west of a line from Merriman to
Brownlee to Sargent. Large hail and damaging winds are the primary
hazard. A few storms may produce damaging winds as high as 75 mph
and very large hail, 2 inches in diameter or larger. Very heavy
rainfall is also possible and an isolated tornado may form.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

Thunderstorms, a few strong or possibly severe, are likely Sunday
afternoon and Sunday evening. The area of concern for severe
weather is generally along and west of line from Cody to Thedford
to Arnold and the hazards are large hail and wind damage.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed between 6 pm and 11 pm along and
west of a line from Merriman to Brownlee to Sargent.

&&

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

In the hours before

Local storm report, Jul 28, 7:46 PM MDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
846 PM CDT SAT JUL 28 2018

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

0846 PM     HAIL             9 S OSHKOSH             41.28N 102.34W
07/28/2018  E2.00 INCH       GARDEN             NE   PUBLIC

            BROKEN WINDOWS AND HEAVY DAMAGE TO SIDING

&&

THORNE

Local storm report, Jul 28, 7:50 PM MDT, 1 hour 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
850 PM CDT SAT JUL 28 2018

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

0845 PM     HAIL             8 S OSHKOSH             41.29N 102.34W
07/28/2018  E1.75 INCH       GARDEN             NE   PUBLIC

&&

THORNE

Local storm report, Jul 28, 7:51 PM MDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
851 PM CDT SAT JUL 28 2018

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

0845 PM     TSTM WND GST     8 S OSHKOSH             41.29N 102.34W
07/28/2018  E60 MPH          GARDEN             NE   PUBLIC

&&

THORNE

Local storm report, Jul 28, 7:57 PM MDT, 1 hour 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
857 PM CDT SAT JUL 28 2018

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

0856 PM     TSTM WND GST     10 W BIG SPRINGS        41.06N 102.27W
07/28/2018  E75 MPH          DEUEL              NE   PUBLIC

&&

THORNE

Local storm report, Jul 28, 8:45 PM MDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
945 PM CDT SAT JUL 28 2018

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

0730 PM     HAIL             OSHKOSH                 41.41N 102.34W
07/28/2018  M3.00 INCH       GARDEN             NE   PUBLIC

            REPORT VIA SOCIAL MEDIA WITH A PICTURE

&&

THORNE

Local storm report, Jul 28, 8:47 PM MDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORTH PLATTE NE
947 PM CDT SAT JUL 28 2018

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

0932 PM     HAIL             1 S VENANGO             40.75N 102.04W
07/28/2018  E2.75 INCH       PERKINS            NE   TRAINED SPOTTER

&&

THORNE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 6:13 PM MDT	Special Weather Statement	LBF	Box Butte	32 min
Jul 28, 6:18 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Sheridan	42 min
Jul 28, 6:30 PM MDT	Special Weather Statement	LBF	Cherry	45 min
Jul 28, 6:31 PM MDT	Special Weather Statement	LBF	Brown	44 min
Jul 28, 6:32 PM MDT	Special Weather Statement	LBF	Garfield	43 min
Jul 28, 6:44 PM MDT	Severe Thunderstorm Warning	LBF	Garden	46 min
Jul 28, 6:52 PM MDT	Special Weather Statement	LBF	Arthur	38 min
Jul 28, 7:12 PM MDT	Severe Thunderstorm Warning	LBF	Garden, Keith	48 min
Jul 28, 7:39 PM MDT	Areal Flood Advisory	LBF	Cherry, Thomas	2 hr
Jul 28, 7:39 PM MDT	Severe Thunderstorm Warning	LBF	Deuel, Garden, Keith	51 min
Jul 28, 7:49 PM MDT	Areal Flood Advisory	LBF	Garfield, Holt	2 hr
Jul 28, 7:59 PM MDT	Severe Thunderstorm Warning	LBF	Perkins	46 min
Jul 28, 8:31 PM MDT	Severe Thunderstorm Warning	LBF	Chase, Perkins	44 min
Jul 28, 9:27 PM MDT	Areal Flood Advisory	LBF	Chase, Frontier, Hayes	3 hr
Jul 29, 6:30 AM MDT	River Flood Warning	LBF	Hayes	25 hr
Jul 29, 3:11 PM MDT	Special Weather Statement	LBF	Keya Paha	49 min
Jul 29, 3:22 PM MDT	Severe Thunderstorm Warning	LBF	Sheridan	23 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.