Flash Flooding and Hail in Colorado, July 12 to 13, 2001

Name: Flash Flooding and Hail in Colorado, July 12 to 13, 2001
Start: 2001-07-12T18:59
End: 2001-07-13T00:30
Location: Colorado

July 12 to 13, 2001 · NWS GLD · 4 events in 2 counties and zones

3 flash flood, 1 hail, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 4

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Goodland, KS wrote its last area forecast discussion before the first event at Jul 12, 1:25 PM MST, 5 hours 34 minutes earlier.

Area forecast discussion, Jul 12, 1:25 PM MST, 5 hours 34 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GOODLAND KS
225 PM MDT THU JUL 12 2001

CHALLENGES ARE THE EXTENT OF TSRA COVERAGE TONIGHT AND SAT NIGHT.

MODELS SIMILAR BUT I THINK AVN DEPICTS EXITING 50H S/W OVER E KS
BEST. WILL LEAN THAT WAY.

50H HTS HAVE RISEN IN LAST 24 HRS ABOUT 20M AND RIDGE LINE HAS
SHIFTED WEST. HOWEVER STILL PLENTY OF MOISTURE AT ALL LEVELS. THAT
WITH HEATING AND SLIGHT CAA ALOFT BEHIND EXITING S/W IS KEY TO 40 TO
60 POPS TONIGHT. SOME SEVERE POSS BUT THINK BEST CHANCE FOR THAT IS
IN FAR EAST CO. AFTER END TSRAS BY MIDNIGHT COMBINATION OF VERY
MOIST BOUNDARY LAYER...LIGHT EAST WINDS AND INCREASING STABILITY
ABOVE THINK LOW CLOUDS AND AREAS OF FOG LIKELY EVERYWHERE IN CWA.
LITTLE CHANGE IN TEMPS FROM LAST NIGHT.

FRI WILL GO A LITTLE ABOVE GUID ON TEMPS (IN UPPER 80S) BASED ON
FEWER CLDS AS RIDGE LINE STABILIZES TO WEST AND CENTER BEGINS TO
ANCHOR IN NE NM. ALSO NEAR OR SLIGHTLY BELOW POPS GUID.

FRI NIGHT SLIGHTLY COOLER AS SLIGHTLY DRIER AIR AND LESS CLDS OVER
AREA. WINDS REMAIN LIGHT. LOW TEMPS NEAR 60 MANY AREAS EXCEPT EAST.
20 PERCENT OR LESS POPS.

SAT AND SAT NIGHT LITTLE CHANGE IN TEMPS AS UPPER HIGH INITIALLY
REMAINS ANCHORED IN NE NM THEN AXIS OF RIDGE BEGINS TO SLOWLY MOVE
TO EAST. MODELS SHOW STRONG S/W RUNS THRU RIDGE FROM WEST LATE SAT
SO WILL GO ABOVE GUID ON POPS MOST AREAS SAT NIGHT. LOTS OF MONSONAL
MOIST IN AREA BY THEN AS UNDER WSW FLOW ALOFT.

WILL KEEP FIRST 4 DAYS OF EXTENDED THE SAME AS RIDGE MOVES NE AND
STRENGTHENS DURING DAY MON. HOWEVER HAVE ADDED CH TSRAS ON THU AS
RIDGE BEGINS TO FLATTEN/WEAKEN.

.GLD...NONE.

RJC

In the hours before

Local storm report, Jul 12, 4:55 PM MST, 2 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
555 PM MDT THU JUL 12 2001

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

0539 PM    4 E ATWOOD                KS   60 MPH TSTM GUST
07/12/01   RAWLINS                        NEAR ZERO VISIBILITY ON
                                          HIGHWAY 36 FOUR MILES
                                          EAST OF ATWOOD.
                                          REPORTED BY STORM
                                          SPOTTER.

Local storm report, Jul 12, 5:01 PM MST, 1 hour 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
601 PM MDT THU JUL 12 2001

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

0558 PM    2 SW ATWOOD               KS   60 MPH TSTM GUST
07/12/01   RAWLINS                        LOW VISIBILITY DUE TO
                                          BLOWING DUST. REPORTED
                                          BY STORM SPOTT_ER.

Local storm report, Jul 12, 5:04 PM MST, 1 hour 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
604 PM MDT THU JUL 12 2001

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

0602 PM    ATWOOD                    KS   WIND DAMAGE
07/12/01   RAWLINS                        1 INCH TREE LIMBS AND
                                          OTHER DEBRIS BLOWING
                                          AROUND. THICK DUST CLOUD.
                                          REPORTED BY STORM SPOTTER.

Local storm report, Jul 12, 6:13 PM MST, 46 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
713 PM MDT THU JUL 12 2001

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

0709 PM    (GLD)RENNER FLD GOODLAND  KS   64 MPH TSTM GUST
07/12/01   SHERMAN                        KGLD ASOS.

Local storm report, Jul 12, 6:30 PM MST, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
730 PM MDT THU JUL 12 2001

TIME(MDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....
2
0715 PM    (GLD)RENNER FLD GOODLAND  KS   1.5 INCH HAIL
07/12/01   SHERMAN

Local storm report, Jul 12, 6:46 PM MST, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GOODLAND KS
746 PM MDT THU JUL 12 2001

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

0642 PM    8 S WHEELER               KS   70 MPH TSTM GUST
07/12/01   CHEYENNE                       ESTIMATED SPEED.
                                          REPORTED BY STORM
                                          SPOTTER.

0716 PM    12 N SHARON SPGS          KS   60 MPH TSTM GUST
07/12/01   WALLACE                        REPORTED BY OFF-DUTY
                                          NWS EMPLOYEE.

The radar

The Goodland radar (KGLD), 79 km away, was scanning. The volume nearest the first event began at 01:59 UTC.

Open the radar archive at this moment

Event by event

3 flash flood, 1 hail. Local standard time, as filed.

Hail, Cheyenne

When: July 12, 6:59 PM MST
Where: Cheyenne County, 4 mi E of Cheyenne Wells
Measured: 0.88 in hail
Reported by: LAW ENFORCEMENT
Coordinates: 38.817, -102.283

Flash Flood, Cheyenne

When: July 12, 7:47 PM MST to 8:47 PM MST
Where: Cheyenne County, 1 mi E of Arapahoe
Reported by: NWS EMPLOYEE(OFF DUTY)
Coordinates: 38.828, -102.603 (the zone’s center; the record gives no point)

Water flowing over highway 40.

Flash Flood, Kit Carson

When: July 12, 8:45 PM MST
Where: Kit Carson County, Burlington
Reported by: GENERAL PUBLIC
Coordinates: 39.305, -102.603 (the zone’s center; the record gives no point)

Heavy rainfall in a short period of time caused street flooding in Burlington.

Flash Flood, Kit Carson

When: July 12, 10:30 PM MST to July 13, 12:30 AM MST
Where: Kit Carson County, 5 mi W of Bethune
Reported by: LAW ENFORCEMENT
Coordinates: 39.305, -102.603 (the zone’s center; the record gives no point)

Several cars stranded from high water and water overflowed highway 24.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Colorado in 2001 Every state in 2001 This day in weather history Warnings in Colorado, July 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5261654, 5261653, 5261652, 5261655.