Alert archive / Colorado / Flash Flood Warnings in 2007

Flash Flood Warning 33, NWS Denver/Boulder, CO

August 22, 2007Weld County, Colorado

NWS Denver/Boulder, CO issued this flash flood warning at Aug 22, 2007, 11:31 PM MDT for Weld County, Colorado. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 22, 2007, 11:31 PM MDT (05:31 UTC)
Expired: Aug 23, 2007, 2:00 AM MDT
In force: 2 hr
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Weld County, CO

The radar

The Cheyenne radar (KCYS), 75 km from the middle of the area, began a volume at 05:34 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 (KDEN), launched 00:00Z, 5.5 hours before the alert went out and 125 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: 95 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 2736 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KBOU 230531
FFWBOU
COC123-230800-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1131 PM MDT WED AUG 22 2007

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 200 AM MDT

* AT 1131 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM 2 MILES EAST OF CARR...OR ABOUT
  16 MILES SOUTH OF CHEYENNE. THIS STORM WAS MOVING EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROCKPORT...
  NATURAL FORT REST AREA AND CARR.

DOPPLER RADAR ESTIMATES THAT AROUND 3 INCHES OF RAIN HAS FALLEN FROM 
STORMS OVER NORTHWESTERN WELD COUNTY IN THE LAST HOUR.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. TURN AROUND...DO NOT DROWN.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

LAT...LON 4098 10493 4080 10492 4080 10452 4099 10442

$$

2 follow-up statements

000 
WGUS75 KBOU 230618
FFSBOU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1215 AM MDT THU AUG 23 2007

COC123-230800-
WELD CO-
1215 AM MDT THU AUG 23 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 200 AM MDT FOR
NORTHWESTERN WELD COUNTY...

AT 1215 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
RAIN HAD ENDED OVER NORTHWESTERN WELD COUNTY.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ROCKPORT...NATURAL FORT REST AREA AND CARR.

DOPPLER RADAR ESTIMATES THAT AROUND 4 INCHES OF RAIN FELL BETWEEN 10 
PM AND 11 PM NEAR CARR.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY 
AUTOMOBILE. TURN AROUND...DO NOT DROWN.

LAT...LON 4098 10493 4080 10492 4080 10452 4099 10442

$$

000 
WGUS75 KBOU 230759
FFSBOU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
159 AM MDT THU AUG 23 2007

COC123-230809-
WELD CO-
159 AM MDT THU AUG 23 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 200 AM MDT FOR NORTHWESTERN
WELD COUNTY...

NO FLOODING HAS BEEN REPORTED SO THE WARNING WILL BE ALLOWED TO 
EXPIRE.

LAT...LON 4098 10493 4080 10492 4080 10452 4099 10442

$$

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this flash flood warning went out at Aug 22, 2:30 PM MDT, 9 hours 1 minute earlier.

Area forecast discussion, Aug 22, 2:30 PM MDT, 9 hours 1 minute before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER CO
230 PM MDT WED AUG 22 2007

.SHORT TERM...FOR TONIGHT...AN UPPER LEVEL DISTURBANCE EMBEDDED IN A
WEAK ZONAL FLOW ALOFT WILL MAKE ITS WAY FM SRN ID AND ACRS SRN WY
THIS EVENING.  BOTH THE GFS/WARF SHOW WEAK UPWARD OMEGA AT THE SFC
AND ALF THIS EVENING...AS THIS SYSTEM MOVES ACROSS.  AMS STABLIZED
SOMEWHAT THIS AFTN...FOLLOWING THE TSTMS THIS MORNING.  AS A RESULT
THE AMS HAS BEEN SLOW TO WARM AND DESTABILIZE AGAIN. SFC BASED CAPE
FM LAPS ANALYSIS THIS AFTN STILL INDICATED 1000-1500 J/KG ALG THE
FRONT RANGE WITH NEARLY 2000 J/KG IN THE NORTHEAST PLAINS.  STILL
SOME CIN AS WELL SO TSTMS MAY NOT INCRS UNTIL THE UPPER TROF MOVES
CLOSER TO THE CWFA.  WILL KEEP SCT POPS IN THE FCST THIS EVENING FOR
MOST AREAS...DIMINISHING LATEST OVER THE FAR ERN PLAINS.  ANOTHER
FRONTAL SURGE WILL MAKE ITS WAY THROUGH NERN CO AROUND 15Z...WITH AN
EVEN COOLER AMS IN PLACE THU AFTN. THERE IS HOWEVER ANOTHER
DISTURBANCE PROGGED TO MOVE ACRSS THE REGION IN THE AFTN.  PW VALUES
RMN HIGH...GENERALLY AROUND 1.25 INCHES IN THE AFTN.  CAPES RANGE FM
1300-2100 J/KG ACROSS THE URBAN CORRIDOR/ADJACENT PLAINS.  SOME CIN
AS WELL...BUT DYNAMICS ASSOCIATED WITH THE UPPER TROF MAY RESOLVE
THIS.  WITH SOME TIMING ISSUES BETWEEN THESE TWO TROFS WILL HOLD ON
TO SOME ISOLD POPS THURSDAY MORNING...WITH THE BEST POTENTIAL FOR
TSTMS LATE THURSDAY AFTN GOING INTO THE EVENING.

.LONG TERM...UPPER LEVEL TROF WILL BE PASSING ACROSS THE RGN THU
NITE/EARLY FRI WITH THE BEST CHANCES OF PRECIP ON THU NITE WITH A
MOIST UPSLOPE LOW LVL FLOW IN PLACE. BOTH GFS/NAM SHOWING QPF AND
LIKELY POPS THU NITE WITH PW VALUES OVER AN INCH. HAVE BUMPED POPS
UP TO HIGH SCATTERED FOR MUCH OF THE AREA. STILL AN ISOLD SEVERE
STORM POSSIBLE THU EVENING WITH STRONG 40KT MID LVL FLOW. EXPECT A
DRYING/WARMING TREND LATE FRI-SAT AS THE TROF AXIS PUSHES EAST AND
CO DRIES OUT FROM W-E. STILL A SLIGHT CHANCE FOR STORMS OVER FAR ERN
CO ON SAT AS LOW LVL MSTR STILL IN PLACE. ON SUNDAY...LOW LVL MSTR
WILL HAVE FLUSHED EAST OF COLORADO BUT THEN LOOKING AT A RETURN FLOW
OF MSTR BACK INTO THE MTNS BY LATE SUNDAY. THIS MSTR IS FROM
HURRICANE DEAN AS MSTR GETS STEERED AROUND THE UPR HIGH. THIS MSTR
WILL SPREAD ACROSS THE ENTIRE FORECAST AREA BY LATE MONDAY AND
TUESDAY WITH SOME REINFORCING UPSLOPE LOW LVL FLOW AS WELL. MAIN
CHANGE FOR LATER PERIODS IS TO ADD SOME LOW POPS IN THE OUT
PERIODS.

&&

.AVIATION...

&&

.BOU WATCHES/WARNINGS/ADVISORIES...NONE.

&&

COOPER/ENTREKIN

Hazardous weather outlook, Aug 22, 10:17 AM MDT, 13 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1017 AM MDT WED AUG 22 2007

COZ030>051-231200-
JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND
COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000
FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST
GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/
SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND
BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST
DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK
COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER
COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON
COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS
COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/
EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES
ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD
COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS
COUNTY-
1017 AM MDT WED AUG 22 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS WILL CONTINUE ACROSS THE NORTHEAST PLAINS
THIS MORNING...MAINLY ALONG AND SOUTH OF THE INTERSTATE 76 CORRIDOR.
THUNDERSTORMS WILL INCREASE IN COVERAGE ALONG AND EAST OF THE FRONT
RANGE FOOTHILLS THROUGH THIS EVENING AS LOW LEVEL MOISTURE INCREASES
BEHIND A FRONTAL BOUNDARY THAT HAS MOVED INTO THE REGION.

A FEW SEVERE THUNDERSTORMS ARE ALSO POSSIBLE. THE MAIN THREATS
FROM THESE STORMS WILL BE LARGE HAIL AND VERY HEAVY RAIN...UP TO 2
INCHES OF RAIN IN AN HOUR. THE THREAT OF SEVERE WEATHER WILL BE
GREATEST EAST OF A LINE FROM KIOWA TO FORT MORGAN TO STERLING.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE WILL BE A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS
THURSDAY THROUGH FRIDAY...WITH AN ISOLATED SEVERE STORM ALSO
POSSIBLE. A SLIGHT DRYING AND WARMING TREND IS EXPECTED FOR THE
WEEKEND. AN INCREASE IN MOISTURE WILL RESULT IN A BETTER CHANCE FOR
STORMS AND COOLER TEMPERATURES AGAIN FOR MONDAY AND TUESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 1 PM THIS AFTERNOON.

FMC/SWE

In the hours before

Local storm report, Aug 22, 6:15 PM MDT, 5 hours 16 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
615 PM MDT WED AUG 22 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0539 PM     HAIL             5 E KIOWA               39.35N 104.37W
08/22/2007  E1.75 INCH       ELBERT             CO   TRAINED SPOTTER

0535 PM     HAIL             2 NW AGATE              39.49N 103.98W
08/22/2007  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

0528 PM     HAIL             3 SSE BUFFALO CREEK     39.34N 105.25W
08/22/2007  M1.00 INCH       JEFFERSON          CO   TRAINED SPOTTER

0450 PM     HAIL             ELIZABETH               39.36N 104.60W
08/22/2007  E1.00 INCH       ELBERT             CO   FIRE DEPT/RESCUE

0424 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E1.00 INCH       DOUGLAS            CO   TRAINED SPOTTER

0422 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0420 PM     HAIL             2 SW CASTLE ROCK        39.36N 104.88W
08/22/2007  E1.25 INCH       DOUGLAS            CO   TRAINED SPOTTER

0948 AM     HAIL             4 SW SEDGWICK           40.89N 102.58W
08/22/2007  M0.75 INCH       SEDGWICK           CO   TRAINED SPOTTER

            1/2 INCH RAIN. MOST HAIL PEA TO MARBLE SIZE.

0945 AM     HAIL             7 W SEDGWICK            40.93N 102.66W
08/22/2007  M0.88 INCH       LOGAN              CO   TRAINED SPOTTER

            MOST HAIL PEA SIZE UP TO PENNY SIZE

&&

CLB

Local storm report, Aug 22, 7:09 PM MDT, 4 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
709 PM MDT WED AUG 22 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0705 PM     HAIL             8 NW LIMON              39.35N 103.79W
08/22/2007  M0.75 INCH       ELBERT             CO   TRAINED SPOTTER

0623 PM     HAIL             HIGHLANDS RANCH         39.55N 104.97W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0620 PM     HAIL             2 WSW HIGHLANDS RANCH   39.54N 105.01W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0539 PM     HAIL             5 E KIOWA               39.35N 104.37W
08/22/2007  E1.75 INCH       ELBERT             CO   TRAINED SPOTTER

0535 PM     HAIL             2 NW AGATE              39.49N 103.98W
08/22/2007  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

0528 PM     HAIL             3 SSE BUFFALO CREEK     39.34N 105.25W
08/22/2007  M1.00 INCH       JEFFERSON          CO   TRAINED SPOTTER

0450 PM     HAIL             ELIZABETH               39.36N 104.60W
08/22/2007  E1.00 INCH       ELBERT             CO   FIRE DEPT/RESCUE

0424 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E1.00 INCH       DOUGLAS            CO   TRAINED SPOTTER

0422 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0420 PM     HAIL             2 SW CASTLE ROCK        39.36N 104.88W
08/22/2007  E1.25 INCH       DOUGLAS            CO   TRAINED SPOTTER

0948 AM     HAIL             4 SW SEDGWICK           40.89N 102.58W
08/22/2007  M0.75 INCH       SEDGWICK           CO   TRAINED SPOTTER

            1/2 INCH RAIN. MOST HAIL PEA TO MARBLE SIZE.

0945 AM     HAIL             7 W SEDGWICK            40.93N 102.66W
08/22/2007  M0.88 INCH       LOGAN              CO   TRAINED SPOTTER

            MOST HAIL PEA SIZE UP TO PENNY SIZE

&&

CLB

Local storm report, Aug 22, 7:57 PM MDT, 3 hours 34 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
757 PM MDT WED AUG 22 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0713 PM     HAIL             2 S LIMON               39.24N 103.69W
08/22/2007  M0.88 INCH       LINCOLN            CO   TRAINED SPOTTER

            HEAVY RAIN.

0705 PM     HAIL             8 NW LIMON              39.35N 103.79W
08/22/2007  M0.75 INCH       ELBERT             CO   TRAINED SPOTTER

0623 PM     HAIL             HIGHLANDS RANCH         39.55N 104.97W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0620 PM     HAIL             2 WSW HIGHLANDS RANCH   39.54N 105.01W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0539 PM     HAIL             5 E KIOWA               39.35N 104.37W
08/22/2007  E1.75 INCH       ELBERT             CO   TRAINED SPOTTER

0535 PM     HAIL             2 NW AGATE              39.49N 103.98W
08/22/2007  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

0528 PM     HAIL             3 SSE BUFFALO CREEK     39.34N 105.25W
08/22/2007  M1.00 INCH       JEFFERSON          CO   TRAINED SPOTTER

0450 PM     HAIL             ELIZABETH               39.36N 104.60W
08/22/2007  E1.00 INCH       ELBERT             CO   FIRE DEPT/RESCUE

0424 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E1.00 INCH       DOUGLAS            CO   TRAINED SPOTTER

0422 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0420 PM     HAIL             2 SW CASTLE ROCK        39.36N 104.88W
08/22/2007  E1.25 INCH       DOUGLAS            CO   TRAINED SPOTTER

0948 AM     HAIL             4 SW SEDGWICK           40.89N 102.58W
08/22/2007  M0.75 INCH       SEDGWICK           CO   TRAINED SPOTTER

            1/2 INCH RAIN. MOST HAIL PEA TO MARBLE SIZE.

0945 AM     HAIL             7 W SEDGWICK            40.93N 102.66W
08/22/2007  M0.88 INCH       LOGAN              CO   TRAINED SPOTTER

            MOST HAIL PEA SIZE UP TO PENNY SIZE

&&

CLB

Local storm report, Aug 22, 11:14 PM MDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1114 PM MDT WED AUG 22 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1105 PM     HAIL             WELLINGTON              40.70N 105.00W
08/22/2007  E1.75 INCH       LARIMER            CO   PUBLIC

0713 PM     HAIL             2 S LIMON               39.24N 103.69W
08/22/2007  M0.88 INCH       LINCOLN            CO   TRAINED SPOTTER

            HEAVY RAIN.

0705 PM     HAIL             8 NW LIMON              39.35N 103.79W
08/22/2007  M0.75 INCH       ELBERT             CO   TRAINED SPOTTER

0623 PM     HAIL             HIGHLANDS RANCH         39.55N 104.97W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0620 PM     HAIL             2 WSW HIGHLANDS RANCH   39.54N 105.01W
08/22/2007  M0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0539 PM     HAIL             5 E KIOWA               39.35N 104.37W
08/22/2007  E1.75 INCH       ELBERT             CO   TRAINED SPOTTER

0535 PM     HAIL             2 NW AGATE              39.49N 103.98W
08/22/2007  M1.00 INCH       ELBERT             CO   TRAINED SPOTTER

0528 PM     HAIL             3 SSE BUFFALO CREEK     39.34N 105.25W
08/22/2007  M1.00 INCH       JEFFERSON          CO   TRAINED SPOTTER

0450 PM     HAIL             ELIZABETH               39.36N 104.60W
08/22/2007  E1.00 INCH       ELBERT             CO   FIRE DEPT/RESCUE

0424 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E1.00 INCH       DOUGLAS            CO   TRAINED SPOTTER

0422 PM     HAIL             3 E CASTLE ROCK         39.38N 104.79W
08/22/2007  E0.88 INCH       DOUGLAS            CO   TRAINED SPOTTER

0420 PM     HAIL             2 SW CASTLE ROCK        39.36N 104.88W
08/22/2007  E1.25 INCH       DOUGLAS            CO   TRAINED SPOTTER

0948 AM     HAIL             4 SW SEDGWICK           40.89N 102.58W
08/22/2007  M0.75 INCH       SEDGWICK           CO   TRAINED SPOTTER

            1/2 INCH RAIN. MOST HAIL PEA TO MARBLE SIZE.

0945 AM     HAIL             7 W SEDGWICK            40.93N 102.66W
08/22/2007  M0.88 INCH       LOGAN              CO   TRAINED SPOTTER

            MOST HAIL PEA SIZE UP TO PENNY SIZE

&&

CB

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 6:33 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Douglas, Elbert	40 min
Aug 22, 6:39 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	66 min
Aug 22, 6:57 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	48 min
Aug 22, 9:53 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	52 min
Aug 22, 11:16 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	32 min
Aug 23, 4:24 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Elbert	33 min
Aug 23, 5:19 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	41 min
Aug 23, 5:43 PM MDT	Severe Thunderstorm Warning	BOU	Elbert, Lincoln	62 min

Nearby

Flash Flood Warnings in Colorado, 2007 Every flash flood warning in 2007

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.