Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 113, NWS Cheyenne, WY

July 11, 1998Cheyenne County, Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 11, 1998, 3:58 PM MDT for Cheyenne County, Kimball County, Nebraska. It was in force for 62 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 11, 1998, 3:58 PM MDT (21:58 UTC)
Expired
Jul 11, 1998, 5:00 PM MDT
In force
62 min
Issued by
NWS Cheyenne, WY
Area
Whole counties

Counties Cheyenne County, NE, Kimball County, NE

The radar

The Cheyenne radar (KCYS), 122 km from the middle of the area, began a volume at 21:59 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, 10.0 hours before the alert went out and 149 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 1998-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 1998-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1936 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
61 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCYS 112157 RRA
SVRCYS
NEC033-105-112300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
358 PM MDT SAT JUL 11 1998

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KIMBALL COUNTY IN THE NEBRASKA PANHANDLE
  WESTERN CHEYENNE COUNTY IN THE NEBRASKA PANHANDLE

* UNTIL 500 PM MDT

* AT 350 PM MDT...SPOTTERS INDICATED A SEVERE THUNDERSTORM 10 MILES
  WEST OF KIMBALL... MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  KIMBALL AT 400 PM MDT
  DIX AT 410 PM MDT
  POTTER 415 PM MDT

SPOTTERS 13 MILES EAST OF THE WYOMING NEBRASKA BORDER ON
INTERSATE 80 INDICATED 60 TO 65 MPH WINDS WITH THESE STORMS... PERSONS
IN THE PATH OF THIS STORM SHOULD WATCH OUT FOR FLYING DEBRIS.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS!

LRE


&

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.

In the hours before

Special weather statement, Jul 11, 10:15 AM MDT, 5 hours 43 minutes before
WYZ061>070-NEZ001>003-019>021-054-055-120000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1015 AM MDT SAT JUL 11 1998

THE SEVERE WEATHER POTENTIAL IN SOUTHEAST WYOMING AND THE NEBRASKA
PANHANDLE IS LOW TODAY.

SPOTTER ACTIVATION MAY BE REQUIRED IN THE NEBRASKA PANHANDLE.

DISCUSSION...THE ATMOSPHERE OVER SOUTHEAST WYOMING WILL DRY OUT SOME
THIS AFTERNOON WITH BETTER LOW LEVEL MOISTURE PERSISTING OVER THE
NEBRASKA PANHANDLE AS A TROUGH OF LOW PRESSURE DEVELOPS OVER THE HIGH
PLAINS EAST OF THE FRONT RANGE TODAY.

DAY TIME HEATING WILL CAUSE MODERATE INSTABILITY OVER EXTREME SOUTHEAST
WYOMING AND THE NEBRASKA PANHANDLE THIS AFTERNOON.  DIRECTIONAL WIND
SHEAR WILL BE BETTER THAN YESTERDAY AND MAY CAUSE ISOLATED SUPER
CELL THUNDERSTORMS LATER IN THE DAY...ESPECIALLY OVER THE NEBRASKA
PANHANDLE.  A 10 TO 20 PERCENT COVERAGE OF AFTERNOON THUNDERSTORMS IS
EXPECTED OVER THE AREA.

WCJIN-WYSE-WYNE
PAL
Special weather statement, Jul 11, 10:15 AM MDT, 5 hours 43 minutes before
WYZ061>070-NEZ001>003-019>021-054-055-120000-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1015 AM MDT SAT JUL 11 1998

THE SEVERE WEATHER POTENTIAL IN SOUTHEAST WYOMING AND THE NEBRASKA
PANHANDLE IS LOW TODAY.

SPOTTER ACTIVATION MAY BE REQUIRED IN THE NEBRASKA PANHANDLE.

DISCUSSION...THE ATMOSPHERE OVER SOUTHEAST WYOMING WILL DRY OUT SOME
THIS AFTERNOON WITH BETTER LOW LEVEL MOISTURE PERSISTING OVER THE
NEBRASKA PANHANDLE AS A TROUGH OF LOW PRESSURE DEVELOPS OVER THE HIGH
PLAINS EAST OF THE FRONT RANGE TODAY.

DAY TIME HEATING WILL CAUSE MODERATE INSTABILITY OVER EXTREME SOUTHEAST
WYOMING AND THE NEBRASKA PANHANDLE THIS AFTERNOON.  DIRECTIONAL WIND
SHEAR WILL BE BETTER THAN YESTERDAY AND MAY CAUSE ISOLATED SUPER
CELL THUNDERSTORMS LATER IN THE DAY...ESPECIALLY OVER THE NEBRASKA
PANHANDLE.  A 10 TO 20 PERCENT COVERAGE OF AFTERNOON THUNDERSTORMS IS
EXPECTED OVER THE AREA.

WCJIN-WYSE-WYNE
PAL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 11, 5:19 PM MDTSevere Thunderstorm WarningCYSCheyenne41 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998Every severe thunderstorm warning in 1998

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.