Alert archive / Nebraska / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 150, NWS Cheyenne, WY

July 1, 2019Scotts Bluff County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 1, 2019, 7:56 PM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 1, 2019, 7:56 PM MDT (01:56 UTC)
Expired: Jul 1, 2019, 8:30 PM MDT
In force: 34 min
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Scotts Bluff County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 144 km from the middle of the area, began a volume at 01:57 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.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 1.9 hours before the alert went out and 222 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: 275 J/kg
Mixed-layer CIN: -171 J/kg
Mixed-layer LCL: 1224 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

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 Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 5:00 PM MDT, 2 hours 56 minutes earlier.

Area forecast discussion, Jul 1, 5:00 PM MDT, 2 hours 56 minutes before

Area Forecast Discussion
National Weather Service Cheyenne WY
500 PM MDT Mon Jul 1 2019

.SHORT TERM...(This evening through Tuesday night)
Issued at 232 PM MDT Mon Jul 1 2019

Convection popping over se Wy currently but not really organizing
much as shear is pretty low and only modest instabilities. Could
see a few stronger storms at times into this evening, likely
brief, with strong wind gusts the main threat. HRRR pretty much
keep activity over se Wy with little over the Panhandle. Tuesday
pretty much more of the same as the CWA remains under a generally
WSW upper flow with weak impulses riding across, with sctd showers
and tstms once again in the aftn and evening, a few potentially
strong.  Activity waning in the evening.

.LONG TERM...(Wednesday through Monday)
Issued at 232 PM MDT Mon Jul 1 2019

Fairly stagnant weather pattern over the region through the period
with upper troughing over the Pacific northwest and upper ridging
over the southern plains keeping a generally swly upper flow over
the area. Weak impulses will pass by from time to time keeping
sctd mainly aftn and evening showers/tstms through the period.
Temperatures remaining around seasonal averages.

&&

.AVIATION...(For the 00Z TAFS through 00Z Tuesday evening)
Issued at 456 PM MDT Mon Jul 1 2019

Thunderstorms early this evening impacting airfields along and
south of a line from Wheatland to Torrington to Scottsbluff. Looks
like storms die off after 03Z or so. Could see low stratus
returning to KCDR and KAIA...given forecast wind directions
though...not quite confident enough to add. Will continue
monitoring for the 06Z TAFs.

&&

.FIRE WEATHER...
Issued at 232 PM MDT Mon Jul 1 2019

Concerns expected to stay low with little change expected in the
weather over the area this week. Temperatures will be seasonal
with scattered showers and thunderstorms pretty much every day,
mostly in the afternoons and evenings.

&&

.HYDROLOGY...
Issued at 219 AM MDT Mon Jul 1 2019

Additional rainfall and snowmelt over the next several days could
bring levels back to action stage, but the heaviest rain looks to
stay to the east of the mountain ranges.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&

SHORT TERM...RE
LONG TERM...RE
AVIATION...GCC
FIRE WEATHER...RE
HYDROLOGY...RUBIN

Hazardous weather outlook, Jul 1, 10:27 AM MDT, 9 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
1027 AM MDT Mon Jul 1 2019

NEZ002-003-019>021-054-055-095-096-WYZ101>119-021000-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-North Laramie Range-
Ferris/Seminoe/Shirley Mountains-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
Laramie Valley-South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
1027 AM MDT Mon Jul 1 2019

This hazardous weather outlook is for portions of western
Nebraska...east central Wyoming...south central Wyoming and
southeast Wyoming.

.DAY ONE...TODAY AND TONIGHT

Isolated to scattered afternoon and evening thunderstorms are
expected. A few of the storms may become strong to marginally severe
over southeast Wyoming along and east of Interstate 25, and over the
southern Nebraska Panhandle. Strong wind gusts appear to be the main
threat though some hail is possible as well.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Scattered afternoon and evening thunderstorms will be possible
nearly every day through the weekend.

.Spotter information statement...

Spotter activation is not expected.

In the hours before

Local storm report, Jul 1, 7:08 PM MDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
708 PM MDT MON JUL 1 2019

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

0703 PM     HAIL             WHEATLAND               42.05N 104.96W
07/01/2019  M0.88 INCH       PLATTE             WY   PUBLIC

&&

WILLS

Local storm report, Jul 1, 7:21 PM MDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
721 PM MDT MON JUL 1 2019

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

0617 PM     HAIL             6 ENE JAY EM            42.49N 104.25W
07/01/2019  E1.00 INCH       GOSHEN             WY   CO-OP OBSERVER

&&

WM

Local storm report, Jul 1, 7:25 PM MDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
725 PM MDT MON JUL 1 2019

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

0710 PM     FLASH FLOOD      14 NE LINGLE            42.30N 104.17W
07/01/2019                   GOSHEN             WY   PUBLIC

&&

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

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
728 PM MDT MON JUL 1 2019

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

0700 PM     TSTM WND GST     11 NNE TORRINGTON       42.20N 104.07W
07/01/2019  M64 MPH          GOSHEN             WY   MESONET

            ALSOP MESONET SITE.

&&

GCLAYCOM

Special weather statement, Jul 1, 7:33 PM MDT, 23 minutes before

Special Weather Statement
National Weather Service Cheyenne WY
733 PM MDT Mon Jul 1 2019

WYZ106>108-020215-
East Platte County WY-
Central Laramie Range and Southwest Platte County WY-
Goshen County WY-
733 PM MDT Mon Jul 1 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL GOSHEN AND
SOUTHEASTERN PLATTE COUNTIES UNTIL 815 PM MDT...

At 732 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Chugcreek, or 10 miles east of Wheatland, moving
southeast at 25 mph.

Penny size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Wheatland, Slater, Chugcreek, Bordeaux, Y-O Ranch and Veteran.

This includes Interstate 25 in Wyoming between mile markers 64 and
77.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 4194 10503 4212 10490 4216 10450 4200 10430
      4174 10463
TIME...MOT...LOC 0132Z 310DEG 20KT 4201 10476

Brothers

Local storm report, Jul 1, 7:52 PM MDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
752 PM MDT MON JUL 1 2019

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

0748 PM     HAIL             3 N MITCHELL            41.99N 103.81W
07/01/2019  M1.00 INCH       SCOTTS BLUFF       NE   STORM CHASER

&&

WILLS

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 1, 6:22 PM MDT	Special Weather Statement	CYS	Converse	38 min
Jul 1, 6:23 PM MDT	Special Weather Statement	CYS	Platte	37 min
Jul 1, 6:28 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	47 min
Jul 1, 7:02 PM MDT	Special Weather Statement	CYS	Platte	28 min
Jul 1, 7:08 PM MDT	Areal Flood Advisory	CYS	Goshen, Niobrara	3 hr
Jul 1, 7:14 PM MDT	Flash Flood Warning	CYS	Goshen	3 hr
Jul 1, 7:33 PM MDT	Special Weather Statement	CYS	Goshen	42 min
Jul 1, 8:06 PM MDT	Special Weather Statement	CYS	Goshen	24 min
Jul 1, 8:09 PM MDT	Areal Flood Advisory	CYS	Goshen, Platte	3 hr
Jul 1, 8:31 PM MDT	Flash Flood Warning	CYS	Goshen	3 hr
Jul 1, 11:24 PM MDT	Flash Flood Warning	CYS	Goshen	7 hr
Jul 1, 11:54 PM MDT	Areal Flood Advisory	CYS	Goshen, Laramie	6 hr
Jul 2, 2:48 PM MDT	Special Weather Statement	CYS	Converse	27 min
Jul 2, 2:57 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Platte	33 min
Jul 2, 3:04 PM MDT	Special Weather Statement	CYS	Converse	41 min
Jul 2, 3:24 PM MDT	Special Weather Statement	CYS	Platte	51 min
Jul 2, 3:30 PM MDT	Special Weather Statement	CYS	Converse	45 min
Jul 2, 3:38 PM MDT	Special Weather Statement	CYS	Converse	37 min
Jul 2, 4:18 PM MDT	Special Weather Statement	CYS	Platte	42 min
Jul 2, 4:43 PM MDT	Areal Flood Advisory	CYS	Albany, Converse, Platte	3 hr
Jul 2, 4:47 PM MDT	Severe Thunderstorm Warning	CYS	Albany, Converse, Platte	43 min
Jul 2, 4:55 PM MDT	Tornado Warning	CYS	Albany, Converse, Platte	18 min
Jul 2, 5:00 PM MDT	Special Weather Statement	CYS	Laramie	30 min
Jul 2, 5:23 PM MDT	Special Weather Statement	CYS	Goshen	52 min
Jul 2, 5:29 PM MDT	Special Weather Statement	CYS	Laramie	31 min
Jul 2, 5:30 PM MDT	Special Weather Statement	CYS	Converse	30 min
Jul 2, 5:32 PM MDT	Special Weather Statement	CYS	Niobrara	28 min
Jul 2, 5:44 PM MDT	Flash Flood Warning	CYS	Goshen	3 hr
Jul 2, 5:44 PM MDT	Severe Thunderstorm Warning	CYS	Goshen	46 min
Jul 1, 7:12 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff, Sioux	48 min
Jul 1, 8:31 PM MDT	Special Weather Statement	CYS	Scotts Bluff	44 min
Jul 1, 8:34 PM MDT	Special Weather Statement	CYS	Scotts Bluff	41 min
Jul 1, 9:14 PM MDT	Special Weather Statement	CYS	Banner	31 min
Jul 1, 9:44 PM MDT	Special Weather Statement	CYS	Banner	46 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2019 Every severe thunderstorm warning in 2019

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.