Alert archive / Kansas / Tornado Watches in 2000

Tornado Watch 607

July 21, 20007 counties in Colorado; 11 counties in Kansas

The Storm Prediction Center issued this tornado watch at Jul 21, 2000, 4:15 PM MDT for 7 counties in Colorado; 11 counties in Kansas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 21, 2000, 4:15 PM MDT (22:15 UTC)
Expired: Jul 21, 2000, 10:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

Counties Baca County, CO, Bent County, CO, Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Lincoln County, CO, Prowers County, CO, Cheyenne County, KS, Grant County, KS, Greeley County, KS, Hamilton County, KS, Kearny County, KS, Morton County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Wallace County, KS, Wichita County, KS

The radar

The Goodland radar (KGLD), 117 km from the middle of the area, began a volume at 22:15 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.

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jul 21, 6:23 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	67 min
Jul 21, 7:07 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	53 min
Jul 21, 7:30 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	45 min
Jul 21, 7:45 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	45 min
Jul 21, 7:45 PM MDT	Tornado Warning	GLD	Sherman	45 min
Jul 21, 7:59 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	61 min
Jul 21, 8:33 PM MDT	Severe Thunderstorm Warning	GLD	Sherman	42 min
Jul 21, 8:40 PM MDT	Severe Thunderstorm Warning	GLD	Cheyenne	65 min
Jul 21, 8:50 PM MDT	Severe Thunderstorm Warning	GLD	Wallace	55 min
Jul 21, 8:58 PM MDT	Severe Thunderstorm Warning	GLD	Kit Carson	47 min
Jul 21, 9:36 PM MDT	Severe Thunderstorm Warning	GLD	Wichita	54 min

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.3 hours before the alert went out and 128 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: 780 J/kg
Mixed-layer CIN: -305 J/kg
Mixed-layer LCL: 1125 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

013 
WWUS9 KMKC 212151
SEL7  
MKC WW 212145
COZ000-KSZ000-220400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 607
STORM PREDICTION CENTER NORMAN OK
345 PM MDT FRI JUL 21 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EASTERN COLORADO                           
   WESTERN KANSAS                             

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 415 PM UNTIL 1000
PM MDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 70 STATUTE MILES EAST AND WEST
OF A LINE FROM 65 MILES NORTHEAST OF LIMON COLORADO TO 15 MILES
WEST OF ELKHART KANSAS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 605...WW 606...

DISCUSSION...STRONGLY SHEARED AND VERY UNSTABLE AIRMASS ACROSS ERN
CO INTO WRN KS.  STORMS DEVELOPING E SIDE OF DEN CYCLONE VICINITY
LIC AND ALONG SE WY/NERN CO BORDER.  STORMS WILL RAPIDLY INTENSIFY
AND PROPAGATE SEWD WITH SUPERCELLS AND ISOLATED TORNADOES. 
ADDITIONALLY VERY LARGE HAIL ASSOCIATED WITH SUPERCELLS WITH
DAMAGING WIND THREAT INCREASING SEWD DURING EVENING.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 33030.


...HALES

395,1012 365,1005 365,1032 395,1040

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 2:15 PM MDT	Tornado Watch	SPC	Logan, Morgan, Phillips, Sedgwick, Weld, Yuma	7 hr

Nearby

Tornado Watches in Kansas, 2000 Tornado Watches in Colorado, 2000 Every tornado watch 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.