Alert archive / Nebraska / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 51, NWS Cheyenne, WY

July 5, 2000Scotts Bluff County, Sioux County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 5, 2000, 6:15 PM MDT for Scotts Bluff County, Sioux County, Nebraska. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jul 5, 2000, 6:15 PM MDT (00:15 UTC)
Expired: Jul 5, 2000, 7:00 PM MDT
In force: 45 min
Issued by: NWS Cheyenne, WY
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Scotts Bluff County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 150 km from the middle of the area, began a volume at 00:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 5, 5:45 PM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.3 hours before the alert went out and 230 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: 1824 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1845 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -28 m²/s²
0-3 km storm-relative helicity: 73 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.

196 
WUUS55 KCYS 060016
SVRCYS
NEC157-165-060100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
615 PM MDT WED JUL 5 2000

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA     
  SOUTHEASTERN SIOUX COUNTY IN THE PANHANDLE OF NEBRASKA

INCLUDING THE CITIES OF...SCOTTSBLUFF...GERING...MINATARE.

* UNTIL 700 PM MDT

* AT 613 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM OVER NORTHEAST SCOTTS BLUFF COUNTY...ABOUT 7 
MILES NORTHEAST OF SCOTTSBLUFF...MOVING NORTHEAST AT 20 MPH.

THIS SEVERE STORM HAS A HISTORY OF THREE QUARTER INCH DIAMTER HAIL AND
HEAVY RAIN.  

THIS WARNING REPLACES THE PREVIOUSLY ISSUED TORNADO WARNING.  

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 11 PM MDT 
WEDNESDAY EVENING FOR THE PANHANDLE OF NEBRASKA. 

LAT...LON 4197 10370 4184 10353 4214 10305 4232 10329

WEILAND

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 5, 2:07 PM MDT, 4 hours 8 minutes earlier.

Area forecast discussion, Jul 5, 2:07 PM MDT, 4 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
207 PM MDT WED JUL 5 2000

OUTFLOW FM CNTRL NEB STRMS MOVG WWD ACRS E BDR CWA. EXTRAPOLATN HAS
THIS APCHG WY/NEB BDR AT 00Z. STRMS FIRING NNEWD ALG SFC CNVRGNC
AXIS W & N FRM CYS. MSTR CNVRGNC AXIS JUST E THIS FLO AXIS...EXTENDG
FM CYS-AIA. STRMS WL REACH OUTFLOW BNDRY SHRTLY AFT 00Z. 19Z RUC
SHOWS DVLPG TROFINESS AT 5H JUST W WY/NEB BDR DURG AFTN WITH INCRSG
DIFFRNTL VORT ADVCTN...MNLY PANHANDL. ETA/AVN HV THIS IDEA ALSO. BIG
QUESTION IS WHEN/WHERE SVR WX WL START. BLV CDR-AIA AREA...WITH HIEST
SR HELICITIES...STILL HAS RISK MST DANGEROUS WX. ETA HAS 60-70% RHS
IN BNDRY LYR SW SD/NRN PANHANDL BY 12Z THU...SO WL KP IDEA OF
FOG/PSBL SPRINKLES OVR PANHANDL AND SPILLG W ACRS WY BDR THU MRNG.
AFTR THAT STGR WLYS FLUSH MSTR AND POPS ZERO OR NR SO. TEMPS LWST
ELEVATNS NXT CPL DAYS IN 90S...BRKG 100S NEB PANHANDL...ESP TOMORROW.

.EXTENDED DISCUSSION...UPPER LEVEL RIDGE OF HIGH PRESSURE WILL
CONTINUE TO DOMINATE THE CWA IN THE EXTENDED.  THE RIDGE BROADENS
AND RETROGRADES INTO THE WESTERN US WITH TIME. MEANWHILE...A TROF OF
LOW PRESSURE REMAINS ALONG THE WEST COAST. NO MAJOR WEATHER SYSTEMS
PROGGED TO EFFECT THE AREA.  HOWEVER...WITH THE FLOW AROUND THE
LARGE HIGH PRESSURE...MONSOONAL MOISTURE WILL BE TRANSPORTED INTO
THE AREA FOR DIURNAL THUNDERSTORMS EACH DAY.

.CYS...
WY...NONE.
NE...NONE.

COX

'

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 6:59 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	46 min
Jul 5, 7:28 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne	47 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2000 Every severe thunderstorm warning in 2000

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.