Alert archive / Nebraska / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 43, NWS Cheyenne, WY

August 24, 2002Kimball County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 24, 2002, 7:19 PM MDT for Kimball County, Nebraska. It was in force for 26 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: Aug 24, 2002, 7:19 PM MDT (01:19 UTC)
Expired: Aug 24, 2002, 7:45 PM MDT
In force: 26 min
Issued by: NWS Cheyenne, WY
Area: Counties, with a storm outline in the text

County Kimball County, NE

The radar

The Cheyenne radar (KCYS), 107 km from the middle of the area, began a volume at 01:19 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 24, 1:15 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 1.3 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-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: 740 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 2494 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

487 
WUUS55 KCYS 250119
SVRCYS
NEC105-250145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
717 PM MDT SAT AUG 24 2002

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA

* UNTIL 745 PM MDT

* AT 709 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER CENTRAL KIMBALL COUNTY...OR ABOUT 8 MILES
  SOUTHEAST OF KIMBALL...MOVING SOUTHEAST AT 20 MPH.

THIS SEVERE THUNDERSTORM WARNING REPLACED THE PREVIOUSLY ISSUED 
TORNADO WARNING FOR NORTHERN KIMBALL COUNTY.

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 58 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM MDT SATURDAY EVENING
FOR THE PANHANDLE OF NEBRASKA AND SOUTHEAST WYOMING.

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

LAT...LON 4124 10353 4111 10368 4100 10356 4103 10337

&&
DAUGHERTY

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 Aug 24, 3:10 PM MDT, 4 hours 9 minutes earlier.

Area forecast discussion, Aug 24, 3:10 PM MDT, 4 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
310 PM MDT SAT AUG 24 2002

AIRMASS CONTINUES MODERATELY UNSTABLE IN WATCH AREA. INVERTED TROUGH
JUST WEST OF WY/NEB BORDER WITH WEAK LOW LEVEL CONVERGENCE AND 50S
TO LOWER 60S DEWPOINTS TO EAST. STRONGEST STORMS HAVE SHIFTED TO FAR
EAST PART OF CWA AND EASTWARD. JUST STARTING TO SEE SOME
STRENGTHENING OF STORMS SOUTH OF DGW ON WEST EDGE WATCH AREA WHERE
AIRMASS ALSO MODERATELY UNSTABLE. WILL HIT THIS EVENING HARD WRT
POPS...T-STORM STRENGTH. WESTERLYS RETURN IN BOUNDARY LAYER FOR SUN
PM AS WELL AS DRIER AIR. WILL CONTINUE SLIGHT CHANCE OF EVENING
STORMS PANHANDLE. AVN INDICATES SMALL AREA QPF NORTHERN PANHANDLE AT
36 HRS/6 PM SUN. FRONTAL BOUNDARY STALLS JUST NORTH AND WEST OF CWA
FOR MON PM AND TUE AM...THEN DROPS SOUTH. INCREASING QPF AND COOLER
TEMPS FOR TUE.

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

COX

In the hours before

Local storm report, Aug 24, 3:49 PM MDT, 3 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE CHEYENNE WY
349 PM MDT SAT AUG 24 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0122 PM    22 W CHEYENNE             WY   F0 TORNADO
08/24/02   LARAMIE

0128 PM    16 SE LARAMIE             WY   F0 TORNADO
08/24/02   ALBANY

0145 PM    25 NE SIDNEY              NE   1.75 INCH HAIL
08/24/02   CHEYENNE

0149 PM    23 W CHEYENNE             WY   .75 INCH HAIL
08/24/02   LARAMIE

Local storm report, Aug 24, 3:49 PM MDT, 3 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE, WY
349 PM MDT SAT AUG 24 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0336 PM    22 W CHEYENNE             WY   F0 TORNADO
08/24/02   LARAMIE

0149 PM    23 W CHEYENNE             WY   .75 INCH HAIL
08/24/02   LARAMIE

0128 PM    16 SE LARAMIE             WY   F0 TORNADO
08/24/02   ALBANY

0145 PM    25 NE SIDNEY              NE   1.75 INCH HAIL
08/24/02   CHEYENNE

0149 PM    23 W CHEYENNE             WY   .75 INCH HAIL
08/24/02   LARAMIE

Local storm report, Aug 24, 4:45 PM MDT, 2 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
445 PM MDT SAT AUG 24 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0122 PM    22 W CHEYENNE             WY   F0 TORNADO
08/24/02   LARAMIE

0128 PM    16 SE LARAMIE             WY   F0 TORNADO
08/24/02   ALBANY

0145 PM    25 NE SIDNEY              NE   1.75 INCH HAIL
08/24/02   CHEYENNE

0149 PM    23 W CHEYENNE             WY   .75 INCH HAIL
08/24/02   LARAMIE

0330 PM    6 N LODGEPOLE             NE   CROP DAMAGE
08/24/02   CHEYENNE                       LARGE HAIL AND STRONG WINDS
                                          STRIPPED CORN AND
                                          SOYBEAN.  OCCURRED BETWEEN
                                          330 PM AND 4 PM.

0436 PM    VETERAN                   WY   1.75 INCH HAIL
08/24/02   GOSHEN

Local storm report, Aug 24, 6:01 PM MDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
601 PM MDT SAT AUG 24 2002

TIME(MDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0122 PM    22 W CHEYENNE             WY   F0 TORNADO
08/24/02   LARAMIE

0128 PM    16 SE LARAMIE             WY   F0 TORNADO
08/24/02   ALBANY

0145 PM    25 NE SIDNEY              NE   1.75 INCH HAIL
08/24/02   CHEYENNE

0149 PM    23 W CHEYENNE             WY   .75 INCH HAIL
08/24/02   LARAMIE

0330 PM    6 N LODGEPOLE             NE   CROP DAMAGE
08/24/02   CHEYENNE                       LARGE HAIL AND STRONG WINDS
                                          STRIPPED CORN AND
                                          SOYBEAN.  OCCURRED BETWEEN
                                          330 PM AND 4 PM.

0436 PM    VETERAN                   WY   1.75 INCH HAIL
08/24/02   GOSHEN

0512 PM    SIDNEY                    NE   .88 INCH HAIL
08/24/02   CHEYENNE

0515 PM    SIDNEY                    NE   1.75 INCH HAIL
08/24/02   CHEYENNE

Special weather statement, Aug 24, 6:10 PM MDT, 1 hour 9 minutes before

WYZ059-060-067-068-070-250030-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
610 PM MDT SAT AUG 24 2002

...TORNADO WATCH 632 THAT WAS IN EFFECT FOR THE SOUTHEAST PLAINS OF
WYOMING HAS BEEN CANCELLED...

THE THUNDERSTORMS THAT PRODUCED SEVERE WEATHER OVER THE SOUTHEAST
WYOMING PLAINS HAVE WEAKENED OR MOVED INTO THE WESTERN NEBRASKA
PANHANDLE EARLY THIS EVENING.  NO ADDITIONAL SEVERE WEATHER IS
EXPECTED IN SOUTHEAST WYOMING FOR THE REST OF THE EVENING AND
THE TORNADO WATCH FOR THAT AREA HAS BEEN CANCELLED.

&&
WEILAND
WCJIN-WYSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 24, 6:26 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	34 min
Aug 24, 6:43 PM MDT	Tornado Warning	CYS	Kimball	32 min
Aug 24, 7:13 PM MDT	Tornado Warning	CYS	Cheyenne	42 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 2002 Every severe thunderstorm warning in 2002

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.