Alert archive / Nebraska / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 2, NWS Cheyenne, WY

April 2, 2001Scotts Bluff County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Apr 2, 2001, 6:06 PM MDT for Scotts Bluff County, Nebraska. It was in force for 39 min. 6 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 2, 2001, 6:06 PM MDT (00:06 UTC)
Expired: Apr 2, 2001, 6:45 PM MDT
In force: 39 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 120 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
Apr 2, 6:08 PM MDT	Hail 0.75	Mitchell, NE
Apr 2, 6:16 PM MDT	Hail 1.25	Gering, NE
Apr 2, 6:25 PM MDT	Hail 1	Scottsbluff, NE
Apr 2, 6:26 PM MDT	Hail 1.25	Gering, NE
Apr 2, 6:30 PM MDT	Hail 2	Scottsbluff, NE	2 inch hail reported on the east side of Scottsbluff, NE.
Apr 2, 6:48 PM MDT	Hail 0.75	Scottsbluff, NE

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.1 hours before the alert went out and 224 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: 175 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 2702 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KCYS 030008
SVRCYS
NEC157-030045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
606 PM MDT MON APR 2 2001

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA
  THIS INCLUDES THE CITY OF SCOTTSBLUFF

* UNTIL 645 PM MDT

* AT 606 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTH OF MITCHELL...OR ABOUT 8 MILES
  WEST OF SCOTTSBLUFF...MOVING NORTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE TERRYTOWN AND GERING

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

REPORT SEVERE WEATHER TO THE NEAREST LAW EN?FORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN CHEYENNE.

$$
JK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 6:46 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill, Scotts Bluff	44 min
Apr 2, 7:51 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	39 min
Apr 2, 8:30 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Scotts Bluff	40 min
Apr 2, 9:17 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	48 min
Apr 2, 9:17 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	48 min
Apr 2, 10:04 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	41 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.