Alert archive / Nebraska / Snow Squall Warnings in 2021

Snow Squall Warning 4, NWS Cheyenne, WY

January 14, 2021Cheyenne County, Kimball County, Nebraska

NWS Cheyenne, WY issued this snow squall warning at Jan 14, 2021, 1:03 PM MST for Cheyenne County, Kimball County, Nebraska. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jan 14, 2021, 1:03 PM MST (20:03 UTC)
Expired
Jan 14, 2021, 1:30 PM MST
In force
27 min
Issued by
NWS Cheyenne, WY
Area
Storm-based polygon

Counties Cheyenne County, NE, Kimball County, NE

The radar

The Cheyenne radar (KCYS), 128 km from the middle of the area, began a volume at 20:03 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

Denver, CO (KDNR), launched 12:00Z, 8.1 hours before the alert went out and 142 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2021-01-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2021-01-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939587897117136156Sfc1 km3 km6 km9 kmRMLM
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
1 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
2072 m above ground
0-6 km bulk shear
124 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

752 
WWUS55 KCYS 142003
SQWCYS

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service Cheyenne WY
103 PM MST Thu Jan 14 2021

NEC033-105-142030-
/O.NEW.KCYS.SQ.W.0004.210114T2003Z-210114T2030Z/
Cheyenne NE-Kimball NE-
103 PM MST Thu Jan 14 2021

The National Weather Service in Cheyenne has issued a

* Snow Squall Warning for...
  Southwestern Cheyenne County in the Panhandle of Nebraska...
  East central Kimball County in the Panhandle of Nebraska...

* Until 130 PM MST.

* At 103 PM MST, a dangerous snow squall was located near Lorenzo, or
  10 miles southwest of Sidney, moving southeast at 45 mph.

  HAZARD...Extremely poor visibility in snow and blowing snow. Wind 
           gusts greater than 30 mph.

  SOURCE...Radar and webcams.

  IMPACT...Dangerous life-threatening travel.

* 

This includes Interstate 80 in Nebraska between mile markers 29 and
65.
 
Locations impacted include...
Sidney, Potter, Dix, Brownson, Sidney Airport and Lorenzo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.

&&

LAT...LON 4119 10352 4129 10348 4128 10325 4109 10278
      4100 10316 4100 10320
TIME...MOT...LOC 2003Z 337DEG 41KT 4106 10315 

$$

Mokry

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 14, 1:28 PM MSTSnow Squall WarningCYSCheyenne, Kimball32 min

Nearby

Snow Squall Warnings in Nebraska, 2021Every snow squall warning in 2021

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.