Alert archive / Colorado / Flash Flood Warnings in 2013
Flash Flood Warning 34, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Sep 11, 2013, 11:16 PM MDT for Boulder County, Jefferson County, Colorado. It was in force for 5 hr. 11 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 11, 2013, 11:16 PM MDT (05:16 UTC)
- Expired
- Sep 12, 2013, 4:15 AM MDT
- In force
- 5 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Flood severity
- None
Counties Boulder County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 61 km from the middle of the area, began a volume at 05:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 11, 11:26 PM MDT | HEAVY RAIN 6.65 | 5 E Boulder, CO | STORM TOTAL SINCE MONDAY WITH 0.36 INCHES PAST HOUR |
| Sep 11, 11:30 PM MDT | HEAVY RAIN 2.93 | 2 Ssw Niwot, CO | STORM TOTAL SO FAR WITH 0.79 INCHES PAST HOUR |
| Sep 12, 12:10 AM MDT | HEAVY RAIN 5.5 | 1 Nw Boulder, CO | 4.00 INCHES PAST 4 HOURS |
| Sep 12, 1:01 AM MDT | HEAVY RAIN 6.16 | 5 Ne Ward, CO | SINCE MONDAY. 4.04 INCHES FROM MIDNIGHT TO MIDNIGHT ON THE 11TH |
| Sep 12, 1:02 AM MDT | FLASH FLOOD | Jamestown, CO | *** 1 FATAL *** MULTIPLE HOMES COLLAPSED AND DESTROYED NEAR JAMESTOWN. |
| Sep 12, 1:02 AM MDT | FLASH FLOOD | Jamestown, CO | MULTIPLE HOMES COLLAPSED NEAR JAMESTOWN |
| Sep 12, 1:02 AM MDT | FLASH FLOOD | Jamestown, CO | STRUCTURES BEING LOST DUE TO FLASH FLOODING |
| Sep 12, 1:24 AM MDT | FLASH FLOOD | Boulder, CO | SIGNIFICANT FLOODING AT THE JUSTICE CENTER IN DOWNTOWN BOULDER |
| Sep 12, 2:20 AM MDT | HEAVY RAIN 2.8 | Lyons, CO | SINCE 6 30 PM LAST NIGHT |
| Sep 12, 2:28 AM MDT | FLASH FLOOD | Boulder, CO | WATER TO A DEPTH OF 2 TWO FEET RUNNNG DOWN THE HAWTHORNE ST IN THE NORTHERN PART OF BOULDER |
| Sep 12, 4:00 AM MDT | FLASH FLOOD | 6 N Boulder, CO | 20 FT WALL OF WATER MOVED DOWN LEFT HAND CANYON. A FIREFIGHTER WAS TRAPPED IN A TREE BUT HAS BEEN RESCUED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 6 storm reports to this flash flood warning; the first came 106 minutes after it went out.
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 nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 5.3 hours before the alert went out and 170 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.
- Mixed-layer CAPE
- 362 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
278
WGUS55 KBOU 120516
FFWBOU
COC013-059-121015-
/O.NEW.KBOU.FF.W.0034.130912T0516Z-130912T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1116 PM MDT WED SEP 11 2013
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN JEFFERSON COUNTY IN NORTHEAST COLORADO...
BOULDER COUNTY IN NORTHEAST COLORADO...
* UNTIL 415 AM MDT
* AT 1115 PM MDT...LAW ENFORCEMENT REPORTED CONSIDERABLE FLASH
FLOODING IN THE WARNED AREA. TORRENTIAL RAINFALL APPROACHING 5
INCHES IN THE LAST 6 HOURS HAS OCCURRED IN SOME AREAS. ADDITIONAL
HEAVY RAIN WILL CONTINUE THROUGH THE MIDNIGHT HOUR...INCREASING
THE INTENSITY OF THE FLASH FLOODING. FLOODING ALONG FOURMILE
CANYON CREEK IS EXPECTED TO PUSH INTO NORTHERN BOULDER WITH
RESIDENTIAL FLOODING EXPECTED. FOURMILE AND BOULDER CREEKS WILL
CONTINUE TO RISE WITH CONTINUED FLASH FLOODING. SOUTH BOULDER
CREEK THROUGH ELDORADO SPRINGS WILL ALSO CONTINUE TO RISE. FLASH
FLOODING HAS ALSO BEEN REPORTED AT THE BASE OF COAL CREEK CANYON
NEAR HIGHWAY 72.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NORTHWESTERN ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN
BROOMFIELD...LAFAYETTE...LOUISVILLE...ERIE...SUPERIOR...LYONS...
JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...GOLD HILL...
NIWOT...SUMMERVILLE...PEACEFUL VALLEY...ALLENSPARK...WALLSTREET...
ROCKY FLATS...RAYMOND...MEEKER PARK...SUNSHINE AND WHITE RANCH OPEN
SPACE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE ALONG BOULDER CREEK
IN THE CITY OF BOULDER...IN THE FOURMILE BURN AREA...AND IN BOULDER
CANYON. HEAVY RAINFALL WILL CAUSE EXTENSIVE AND SEVERE FLASH
FLOODING OF CREEKS AND STREAMS FROM THE FOURMILE BURN AREA DOWNSTREAM
THROUGH THE CITY OF BOULDER. SOME DRAINAGE BASINS IMPACTED INCLUDE
BOULDER CREEK...FOURMILE CREEK...GOLD RUN...FOURMILE CANYON CREEK...
AND WONDERLAND CREEK. SEVERE DEBRIS FLOWS CAN ALSO BE ANTICIPATED
ACROSS ROADS. ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES. IF
YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD
ALSO TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4011 10515 4010 10505 3996 10505 3994 10511
3995 10513 3993 10515 3991 10510 3985 10509
3978 10521 3977 10540 3992 10539 3994 10545
4026 10555 4026 10524
$$
BARJENBRUCH4 follow-up statements
096
WGUS75 KBOU 120600
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1153 PM MDT WED SEP 11 2013
COC013-059-121015-
/O.CON.KBOU.FF.W.0034.000000T0000Z-130912T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON CO-BOULDER CO-
1153 PM MDT WED SEP 11 2013
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT FOR
NORTHERN JEFFERSON AND BOULDER COUNTIES...
...THIS IS A FLASH FLOOD EMERGENCY FOR NORTHERN JEFFERSON AND
BOULDER COUNTIES...
AT 1153 PM MDT...LOCAL LAW ENFORCEMENT AND EMERGENCY MANAGEMENT
REPORTED FLASH FLOODING IN SEVERAL LOCATIONS. 4 TO 6 INCHES OF RAIN
HAS FALLEN IN SOME PLACES THIS EVENING. FLASH FLOODING IS ALREADY
OCCURRING IN MANY LOCATIONS AND THIS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NORTHWESTERN ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN
BROOMFIELD...LAFAYETTE...LOUISVILLE...ERIE...SUPERIOR...LYONS...
JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...GOLD HILL...
NIWOT...SUMMERVILLE...PEACEFUL VALLEY...ALLENSPARK...WALLSTREET...
ROCKY FLATS...RAYMOND...MEEKER PARK...SUNSHINE AND WHITE RANCH OPEN
SPACE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. THIS IS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION. DO NOT ATTEMPT TO TRAVEL UNLESS YOU ARE
FLEEING AN AREA SUBJECT TO FLOODING OR UNDER AN EVACUATION ORDER.
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE ALONG BOULDER CREEK
IN THE CITY OF BOULDER...IN THE FOURMILE BURN AREA...BOULDER
CANYON...LEFT HAND CANYON AND SAINT VRAIN CREEK AREA INCLUDING
LYONS.
HEAVY RAINFALL WILL CAUSE EXTENSIVE AND SEVERE FLASH FLOODING OF
CREEKS AND STREAMS FROM THE FOURMILE BURN AREA DOWNSTREAM THROUGH
THE CITY OF BOULDER. SOME DRAINAGE BASINS IMPACTED INCLUDE BOULDER
CREEK...FOURMILE CREEK...GOLD RUN...FOURMILE CANYON CREEK... AND
WONDERLAND CREEK. SEVERE DEBRIS FLOWS CAN ALSO BE ANTICIPATED
ACROSS ROADS. ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES.
IF YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
EXCESSIVE RUNOFF WILL CAUSE FLASH FLOODING OF CREEKS AND
STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4011 10515 4010 10505 3996 10505 3994 10511
3995 10513 3993 10515 3991 10510 3985 10509
3978 10521 3977 10540 3992 10539 3994 10545
4026 10555 4026 10524
$$
RPK112
WGUS75 KBOU 120734
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
134 AM MDT THU SEP 12 2013
COC013-059-121015-
/O.CON.KBOU.FF.W.0034.000000T0000Z-130912T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON CO-BOULDER CO-
134 AM MDT THU SEP 12 2013
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT FOR
NORTHERN JEFFERSON AND BOULDER COUNTIES...
...FLASH FLOOD EMERGENCY CONTINUES FOR NORTHERN JEFFERSON AND
BOULDER COUNTIES...
AT 129 AM MDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
THAT HEAVY RAIN WAS FALLING OVER THE AREA. LOCAL LAW ENFORCEMENT AND
EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN SEVERAL LOCATIONS.
4 TO 6 INCHES OF RAIN HAS FALLEN IN SOME PLACES THIS EVENING WITH UP
TO 7 INCHES IN A FEW LOCATIONS. FLASH FLOODING IS ALREADY OCCURRING
IN MANY LOCATIONS AND THIS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...NORTHWESTERN
ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN
BROOMFIELD...LAFAYETTE...LOUISVILLE...ERIE...SUPERIOR...LYONS...
JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...GOLD HILL...
NIWOT...SUMMERVILLE...PEACEFUL VALLEY...ALLENSPARK...WALLSTREET...
ROCKY FLATS...RAYMOND...MEEKER PARK...SUNSHINE AND WHITE RANCH OPEN
SPACE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. THIS IS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION. DO NOT ATTEMPT TO TRAVEL UNLESS YOU ARE
FLEEING AN AREA SUBJECT TO FLOODING OR UNDER AN EVACUATION ORDER.
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE ALONG BOULDER CREEK
IN THE CITY OF BOULDER...IN THE FOURMILE BURN AREA...BOULDER
CANYON...LEFT HAND CANYON AND SAINT VRAIN CREEK AREA INCLUDING
LYONS.
HEAVY RAINFALL WILL CAUSE EXTENSIVE AND SEVERE FLASH FLOODING OF
CREEKS AND STREAMS FROM THE FOURMILE BURN AREA DOWNSTREAM THROUGH
THE CITY OF BOULDER. SOME DRAINAGE BASINS IMPACTED INCLUDE BOULDER
CREEK...FOURMILE CREEK...GOLD RUN...FOURMILE CANYON CREEK... AND
WONDERLAND CREEK. SEVERE DEBRIS FLOWS CAN ALSO BE ANTICIPATED
ACROSS ROADS. ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES.
IF YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
EXCESSIVE RUNOFF WILL CAUSE FLASH FLOODING OF CREEKS AND
STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4011 10515 4010 10505 3996 10505 3994 10511
3995 10513 3993 10515 3991 10510 3985 10509
3978 10521 3977 10540 3992 10539 3994 10545
4026 10555 4026 10524
$$
RPK003
WGUS75 KBOU 120757
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
157 AM MDT THU SEP 12 2013
COC013-059-121015-
/O.CON.KBOU.FF.W.0034.000000T0000Z-130912T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON CO-BOULDER CO-
157 AM MDT THU SEP 12 2013
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT FOR
NORTHERN JEFFERSON AND BOULDER COUNTIES...
...THIS IS A FLASH FLOOD EMERGENCY FOR BOULDER COUNTY...
AT 150 AM MDT...EMERGENCY MANAGEMENT REPORTED COLLAPSED HOUSES NEAR
JAMESTOWN. MAJOR FLOODING IS OCCURRING ON SOUTH SAINT VRAIN CREEK IN
NORTHERN BOULDER COUNTY. THERE IS MODERATE TO MAJOR FLOODING IN THE
FOURMILE BURN AREA WEST OF THE CITY OF BOULDER. THERE IS MODERATE
FLOODING ON BOULDER CREEK THROUGH THE CITY OF BOULDER AND IN
LEFTHAND CANYON. MINOR FLOODING IS FORECAST OR OCCURRING ON SAINT
VRAIN CREEK THROUGH LYONS. MINOR FLOODING HAS BEEN OCCURRING ON
SOUTH BOULDER CREEK IN SOUTHERN BOULDER COUNTY.
SOME LOCATIONS EXPERIENCING FLOODING INCLUDE... NORTHWESTERN
ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN
BROOMFIELD...LAFAYETTE...LOUISVILLE...ERIE...SUPERIOR...LYONS...
JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...GOLD HILL...
NIWOT...SUMMERVILLE...PEACEFUL VALLEY...ALLENSPARK...WALLSTREET...
ROCKY FLATS...RAYMOND...MEEKER PARK...SUNSHINE AND WHITE RANCH OPEN
SPACE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. THIS IS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION. DO NOT ATTEMPT TO TRAVEL UNLESS YOU ARE
FLEEING AN AREA SUBJECT TO FLOODING OR UNDER AN EVACUATION ORDER.
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE ALONG BOULDER CREEK
IN THE CITY OF BOULDER...IN THE FOURMILE BURN AREA...AND IN BOULDER
CANYON. HEAVY RAINFALL WILL CAUSE EXTENSIVE AND SEVERE FLASH
FLOODING OF CREEKS AND STREAMS FROM THE FOURMILE BURN AREA DOWNSTREAM
THROUGH THE CITY OF BOULDER. SOME DRAINAGE BASINS IMPACTED INCLUDE
BOULDER CREEK...FOURMILE CREEK...GOLD RUN...FOURMILE CANYON CREEK...
AND WONDERLAND CREEK. SEVERE DEBRIS FLOWS CAN ALSO BE ANTICIPATED
ACROSS ROADS. ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES. IF
YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4011 10515 4010 10505 3996 10505 3994 10511
3995 10513 3993 10515 3991 10510 3985 10509
3978 10521 3977 10540 3992 10539 3994 10545
4026 10555 4026 10524
$$
TLH330
WGUS75 KBOU 120920
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
320 AM MDT THU SEP 12 2013
COC013-059-121015-
/O.CON.KBOU.FF.W.0034.000000T0000Z-130912T1015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JEFFERSON CO-BOULDER CO-
320 AM MDT THU SEP 12 2013
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM MDT FOR
NORTHERN JEFFERSON AND BOULDER COUNTIES...
...THIS IS A FLASH FLOOD EMERGENCY FOR BOULDER COUNTY...
EMERGENCY MANAGEMENT REPORTED COLLAPSED HOUSES NEAR JAMESTOWN. MAJOR
FLOODING IS OCCURRING ON SOUTH SAINT VRAIN CREEK IN NORTHERN BOULDER
COUNTY. THERE IS MODERATE TO MAJOR FLOODING IN THE FOURMILE BURN
AREA WEST OF THE CITY OF BOULDER. THERE IS MODERATE FLOODING ON
BOULDER CREEK THROUGH THE CITY OF BOULDER AND IN LEFTHAND CANYON.
MINOR FLOODING IS FORECAST OR OCCURRING ON SAINT VRAIN CREEK THROUGH
LYONS. MINOR FLOODING HAS BEEN OCCURRING ON SOUTH BOULDER CREEK IN
SOUTHERN BOULDER COUNTY.
RAINFALL AMOUNTS HAVE BEEN FROM 4 TO 6 INCHES WITH LOCALLY OVER 7
INCHES IN A FEW LOCATIONS.
SOME LOCATIONS EXPERIENCING FLOODING INCLUDE... NORTHWESTERN
ARVADA...WESTERN WESTMINSTER...BOULDER...WESTERN
BROOMFIELD...LAFAYETTE...LOUISVILLE...ERIE...SUPERIOR...LYONS...
JAMESTOWN...SALINA...ELDORADO SPRINGS...CRISMAN...GOLD HILL...
NIWOT...SUMMERVILLE...PEACEFUL VALLEY...ALLENSPARK...WALLSTREET...
ROCKY FLATS...RAYMOND...MEEKER PARK...SUNSHINE AND WHITE RANCH OPEN
SPACE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. THIS IS AN EXTREMELY DANGEROUS AND LIFE
THREATENING SITUATION. DO NOT ATTEMPT TO TRAVEL UNLESS YOU ARE
FLEEING AN AREA SUBJECT TO FLOODING OR UNDER AN EVACUATION ORDER.
THIS IS A LIFE THREATENING SITUATION FOR PEOPLE ALONG BOULDER CREEK
IN THE CITY OF BOULDER...IN THE FOURMILE BURN AREA...AND IN BOULDER
CANYON. HEAVY RAINFALL WILL CAUSE EXTENSIVE AND SEVERE FLASH
FLOODING OF CREEKS AND STREAMS FROM THE FOURMILE BURN AREA DOWNSTREAM
THROUGH THE CITY OF BOULDER. SOME DRAINAGE BASINS IMPACTED INCLUDE
BOULDER CREEK...FOURMILE CREEK...GOLD RUN...FOURMILE CANYON CREEK...
AND WONDERLAND CREEK. SEVERE DEBRIS FLOWS CAN ALSO BE ANTICIPATED
ACROSS ROADS. ROADWAYS AND BRIDGES MAY BE WASHED AWAY IN PLACES. IF
YOU ENCOUNTER FLOOD WATERS...CLIMB TO SAFETY.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
&&
LAT...LON 4011 10515 4010 10505 3996 10505 3994 10511
3995 10513 3993 10515 3991 10510 3985 10509
3978 10521 3977 10540 3992 10539 3994 10545
4026 10555 4026 10524
$$
RPKWhat 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 Sep 11, 8:23 PM MDT, 2 hours 53 minutes earlier.
Area forecast discussion, Sep 11, 8:23 PM MDT, 2 hours 53 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 823 PM MDT WED SEP 11 2013 .UPDATE...ACTIVE EVENING WITH VERY EFFICIENT RAIN PROCESSES OCCURING...SEE HYDRO DISCUSSION BELOW. WILL CONTINUE HIGH POPS AND LOCALLY HEAVY RAINFALL WHICH SHOULD CONTINUE TIL AROUND MIDNIGHT BEFORE FINALLY DECREASING. HOWEVER...STILL A THREAT OF FLOODING LATER TONIGHT EVEN AS INTENSITIES DECREASE GIVEN THE SATURATED SOIL CONDITIONS. && .AVIATION...NO CHANGES. && .HYDROLOGY...LOW TOPPED AND VERY TROPICAL RAIN PATTERN WITH VERY DEEP WARM CLOUD DEPTH NEAR 10,000 FT. VERY EFFICIENT RAIN PRODUCERS THIS EVENING. FLASH FLOOD THREAT WILL CONTINUE FOR THE NEXT FEW HOURS. AREAL FLOOD WARNINGS/ADVISORIES MAY BE NEEDED OVERNIGHT GIVEN WIDESPREAD NATURE OF RAIN TONIGHT AND CONVECTIVE PROPERTIES GRADUALLY DECREASE. && .PREV DISCUSSION... /ISSUED 241 PM MDT WED SEP 11 2013/ SHORT TERM...TONIGHT AND THURSDAY...LITTLE CHANGE IN THE PATTERN OVER THE NEXT 24 HOURS. UPPER LEVEL LOW CENTERED NEAR LAS VEGAS WILL SLOWLY LIFT NORTH OVER THE NEXT 24 HOURS. A VERY MOIST SOUTH- SOUTHWEST FLOW ALOFT WILL CONTINUE. A SHORT WAVE TROUGH EMBEDDED IN THE FLOW ALOFT IS OVER SOUTH CENTRAL/SOUTHEAST COLORADO. THIS IS BRING RAIN SHOWERS TO EASTERN AND NORTHEAST COLORADO AT THIS TIME. THE WAVE WILL CONTINUE TO MOVE NORTH-NORTHEAST AND PUSH THE WIDESPREAD SHOWERS EAST OF THE AREA. THERE IS SOMEWHAT DRIER AIR BEHIND THE WAVE AND THERE ARE PARTIAL BREAKS IN THE CLOUDS. THESE BREAKS HAVE ALLOWED SOME LOCATIONS CLIMB TO AROUND 70 DEGREES. EXPECT SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS TO REDEVELOP BEHIND THIS WAVE DUE TO SOME INSTABILITY. HEAVY RAIN WILL BE THE BIGGEST CONCERN THE STRONGER SHOWERS AND THUNDERSTORMS. AIRMASS IS VERY MOIST WITH PRECIPITABLE WATER VALUES AROUND 1.25 INCHES AND DEW POINTS IN THE UPPER 50S AND LOWER 60S. WHERE TEMPERATURES CLIMB TO AROUND 70 DEGREES CAPES WILL BE AROUND 700 J/KG. NOT ENOUGH FOR SEVERE WEATHER...BUT PLENTY OF MOISTURE AND INSTABILITY FOR VERY HEAVY RAIN OUT OF THUNDERSTORMS. RAINFALL RATES OUT OF THE THUNDERSTORMS MAY REACH AN INCH IN 20 TO 30 MINUTES. SHOWERS ARE EXPECTED TO DECREASE OVERNIGHT AND THUNDERSTORMS WILL END. THE FORECAST AREA WILL BE BETWEEN WAVES SO ONLY EXPECT SCATTERED TO ISOLATED SHOWERS OVERNIGHT. THE NEXT WAVE WILL ROTATE INTO SOUTHERN COLORADO THURSDAY AFTERNOON. THIS IS EXPECTED TO BRING ANOTHER ROUND OF RAIN SHOWERS AND ISOLATED THUNDERSTORMS. AIRMASS TO REMAIN VERY MOIST...SO HEAVY RAIN WILL AGAIN BE A THREAT. HIGHS WILL BE COOL OVER NORTHEAST COLORADO WITH HIGHS IN THE MID 60S ALONG THE FRONT RANGE TO LOWER 70S OVER THE EASTERN PLAINS. LONG TERM...THE UPPER LOW WILL REMAIN ANCHORED OVER THE GREAT BASIN THROUGH SATURDAY...THEN SLOWLY EJECT EASTWARD ACROSS THE ROCKIES SUNDAY AND MONDAY. AHEAD OF THIS LOW THE AIRMASS OVER COLORADO WILL CONTINUE TO BE MOIST AND MARGINALLY UNSTABLE WITH OCCASIONAL TROUGHS LIFTING ACROSS THE STATE. FRIDAY LOOKS LIKE ANOTHER DAY WITH A GOOD CHANCE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS...SATURDAY LOOKS A BIT DRYER AND WARMER. ON SUNDAY A COLD FRONT IS EXPECTED TO DROP ACROSS NORTHEAST COLORADO. THIS WILL INCREASE LOW LEVEL UPSLOPE FLOW...DROP TEMPERATURES A FEW DEGREES...AND INCREASE THE CHANCE OF SHOWERS AND THUNDERSTORMS. THE PATTERN WILL CHANGE EARLY NEXT WEEK WITH SOUTHWEST FLOW DEVELOPING OVER COLORADO...AND A LEE SURFACE TROUGH IN EASTERN COLORODO. THIS WILL RESULT IN WARMER TEMPERATURES. THERE MAY BE A FEW THUNDERSTORMS OVER THE MOUNTAINS EARLY NEXT WEEK BUT THE PLAINS SHOULD REMAIN DRY. AVIATION...CEILINGS WILL GENERALLY REMAIN BETWEEN 3000 TO 6000 FEET ACROSS THE DENVER AREA FOR THE REST OF THIS AFTERNOON AND EVENING. CEILING MAY OCCASIONALLY BE HIGHER. AT BJC...CEILINGS WILL BE LOWER...AT 1000 TO 3000 FEET DUE TO UPSLOPE WINDS. CEILINGS WILL FALL OVERNIGHT AGAIN TO 500 TO 1500 FEET. THERE IS A GOOD CHANCE AGAIN FOR FOG AND CEILINGS OF 100 TO 500 FEET BETWEEN 10Z AND 15Z. ISOLATED STORMS WILL BE POSSIBLE THROUGH 02Z. BRIEF HEAVY RAIN WILL BE ACCOMPANY THE STRONGER STORMS. LOW CLOUDS AND RAIN SHOWERS WITH A FEW EMBEDDED AFTERNOON STORMS ARE EXPECTED TO PREVAIL ONCE AGAIN THURSDAY. HYDROLOGY...RAINFALL OVER THE PAST FEW DAYS HAVE SATURATED SOILS IN SPOTS. A FEW STREAMS ARE RUNNING HIGH BUT NO FLOODING HAS BEEN REPORTED. THE HEAVIER RAIN SHOWERS ARE PRODUCING RAINFALL RATES OF A QUARTER TO A HALF INCH PER HOUR...NOT A BIG CONCERN. HOWEVER THE THUNDERSTORMS THAT FORM COULD PRODUCE RAINFALL RATES OF 1 INCH IN 20 TO 30 MINUTES...WHICH COULD CAUSE LOCALIZED FLOODING ISSUES. RAIN SHOWERS WITH EMBEDDED THUNDERSTORMS WILL CONTINUE THROUGH FRIDAY. IT WILL DRY OUT SOME THIS WEEKEND BUT AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...BARJENBRUCH LONG TERM....RTG AVIATION...BARJENBRUCH
Hazardous weather outlook, Sep 11, 10:56 AM MDT, 12 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1056 AM MDT WED SEP 11 2013 COZ030>051-121700- 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- 1056 AM MDT WED SEP 11 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SHOWERS AND A FEW THUNDERSTORMS WILL OCCUR TODAY AND CONTINUE INTO THE EVENING HOURS. RAINFALL AMOUNTS UP TO AN INCH IN TWO TO THREE HOURS MAY OCCUR IN A FEW LOCATIONS WHERE HEAVIER SHOWERS DEVELOP. UNDER THE STRONGER THUNDERSTORMS...UP TO AN INCH OF RAIN WILL BE POSSIBLE IN 20 MINUTES TO THIRTY MINUTES. SCATTERED RAIN SHOWERS WILL LINGER THROUGH THE NIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY UNSEASONABLY COOL AND MOIST CONDITIONS WILL PERSIST FOR ONE MORE DAY ON THURSDAY WITH SHOWERS AND THUNDERSTORMS ACROSS MOST OF THE OUTLOOK AREA. SOME STORMS DURING THE AFTERNOON AND EVENING HOURS MAY PRODUCE HEAVY RAINFALL AND POSSIBLY SOME SMALL HAIL...POSSIBLY RESULTING IN LOCALIZED FLOODING. THE HIGHER MOUNTAIN PEAKS MAY ALSO SEE SOME LIGHT SNOW. THERE WILL BE A BIT MORE SUNSHINE FRIDAY AND SATURDAY...BUT SCATTERED SHOWERS WILL STILL BE POSSIBLE ESPECIALLY IN THE AFTERNOON AND EVENING. SUNDAY A COOL FRONT PUSHES INTO NORTHEAST COLORADO INCREASING CHANCES FOR PRECIPITATAION ONCE AGAIN. DRYER AND WARMER WEATHER FINALLY ARRIVES IN NORTHEAST COLORADO BY TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
In the hours before
Local storm report, Sep 11, 9:53 PM MDT, 1 hour 23 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
953 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKLocal storm report, Sep 11, 10:23 PM MDT, 53 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1023 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 PM HEAVY RAIN 5 E BOULDER 40.03N 105.16W
09/11/2013 M6.29 INCH BOULDER CO TRAINED SPOTTER
2.35 INCHES PAST 3 HOURS. THE 6.29 INCHES IS THE TOTAL SO
FAR SINCE 5 PM MONDAY
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKLocal storm report, Sep 11, 10:36 PM MDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1036 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 PM FLASH FLOOD BOULDER 40.03N 105.25W
09/11/2013 BOULDER CO EMERGENCY MNGR
3RD ST AND CANYON AND EASTBOUND BASELINE AT FOOTHILLS
HAVE PARTIAL CLOSURES DUE TO DEBRIS. FLOODING AT 9TH AND
BALSAM.
1000 PM HEAVY RAIN 13 NW GOLDEN 39.87N 105.39W
09/11/2013 M2.31 INCH JEFFERSON CO TRAINED SPOTTER
PAST 16 HOURS. BEAVER CREEK IS BANKFULL. COAL CREEK IS
OVERBANK AND WASHING OVER HWY 72 AT TWIN SPRUCE
1000 PM HEAVY RAIN 5 E BOULDER 40.03N 105.16W
09/11/2013 M6.29 INCH BOULDER CO TRAINED SPOTTER
2.35 INCHES PAST 3 HOURS. THE 6.29 INCHES IS THE TOTAL SO
FAR SINCE 5 PM MONDAY
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKLocal storm report, Sep 11, 10:43 PM MDT, 33 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1043 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1039 PM FLASH FLOOD 12 N FORT COLLINS 40.73N 105.07W
09/11/2013 LARIMER CO TRAINED SPOTTER
ROAD CLOSED DUE TO WATER OVER THE ROAD
1039 PM FLASH FLOOD 18 WNW FORT COLLINS 40.65N 105.39W
09/11/2013 LARIMER CO TRAINED SPOTTER
HIGHWAY 14 FROM RUSTIC TO TEDS PLACE IS CLOSED DUE TO
FLOODING AND DEBRIS
1000 PM HEAVY RAIN 13 NW GOLDEN 39.87N 105.39W
09/11/2013 M2.31 INCH JEFFERSON CO TRAINED SPOTTER
PAST 16 HOURS. BEAVER CREEK IS BANKFULL. COAL CREEK IS
OVERBANK AND WASHING OVER HWY 72 AT TWIN SPRUCE
1000 PM HEAVY RAIN 5 E BOULDER 40.03N 105.16W
09/11/2013 M6.29 INCH BOULDER CO TRAINED SPOTTER
2.35 INCHES PAST 3 HOURS. THE 6.29 INCHES IS THE TOTAL SO
FAR SINCE 5 PM MONDAY
1000 PM FLASH FLOOD BOULDER 40.03N 105.25W
09/11/2013 BOULDER CO EMERGENCY MNGR
3RD ST AND CANYON AND EASTBOUND BASELINE AT FOOTHILLS
HAVE PARTIAL CLOSURES DUE TO DEBRIS. FLOODING AT 9TH AND
BALSAM.
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKLocal storm report, Sep 11, 11:00 PM MDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1100 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1100 PM FLASH FLOOD 8 WSW LOVELAND 40.37N 105.21W
09/11/2013 LARIMER CO TRAINED SPOTTER
4.12 INCHES OF RAIN PAST 4 HOURS. ROADS ARE WASHED OUT
1039 PM FLASH FLOOD 12 N FORT COLLINS 40.73N 105.07W
09/11/2013 LARIMER CO TRAINED SPOTTER
ROAD CLOSED DUE TO WATER OVER THE ROAD
1039 PM FLASH FLOOD 18 WNW FORT COLLINS 40.65N 105.39W
09/11/2013 LARIMER CO TRAINED SPOTTER
HIGHWAY 14 FROM RUSTIC TO TEDS PLACE IS CLOSED DUE TO
FLOODING AND DEBRIS
1038 PM FLASH FLOOD 5 W BOULDER 40.03N 105.35W
09/11/2013 BOULDER CO TRAINED SPOTTER
INGRAM GULCH IS CLOSED AND WATER IS NOW FLOWING OVER GOLD
RUN ROAD.
1038 PM HEAVY RAIN 3 E LAFAYETTE 39.99N 105.04W
09/11/2013 M4.52 INCH BROOMFIELD CO TRAINED SPOTTER
2.97 INCHES SO FAR TODAY
1000 PM HEAVY RAIN 13 NW GOLDEN 39.87N 105.39W
09/11/2013 M2.31 INCH JEFFERSON CO TRAINED SPOTTER
PAST 16 HOURS. BEAVER CREEK IS BANKFULL. COAL CREEK IS
OVERBANK AND WASHING OVER HWY 72 AT TWIN SPRUCE
1000 PM HEAVY RAIN 5 E BOULDER 40.03N 105.16W
09/11/2013 M6.29 INCH BOULDER CO TRAINED SPOTTER
2.35 INCHES PAST 3 HOURS. THE 6.29 INCHES IS THE TOTAL SO
FAR SINCE 5 PM MONDAY
1000 PM FLASH FLOOD BOULDER 40.03N 105.25W
09/11/2013 BOULDER CO EMERGENCY MNGR
3RD ST AND CANYON AND EASTBOUND BASELINE AT FOOTHILLS
HAVE PARTIAL CLOSURES DUE TO DEBRIS. FLOODING AT 9TH AND
BALSAM.
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKLocal storm report, Sep 11, 11:13 PM MDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1113 PM MDT WED SEP 11 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1100 PM FLASH FLOOD 8 WSW LOVELAND 40.37N 105.21W
09/11/2013 LARIMER CO TRAINED SPOTTER
4.12 INCHES OF RAIN PAST 4 HOURS. ROADS ARE WASHED OUT
1039 PM FLASH FLOOD 12 N FORT COLLINS 40.73N 105.07W
09/11/2013 LARIMER CO TRAINED SPOTTER
ROAD CLOSED DUE TO WATER OVER THE ROAD
1039 PM FLASH FLOOD 18 WNW FORT COLLINS 40.65N 105.39W
09/11/2013 LARIMER CO TRAINED SPOTTER
HIGHWAY 14 FROM RUSTIC TO TEDS PLACE IS CLOSED DUE TO
FLOODING AND DEBRIS
1038 PM FLASH FLOOD 5 W BOULDER 40.03N 105.35W
09/11/2013 BOULDER CO TRAINED SPOTTER
INGRAM GULCH IS CLOSED AND WATER IS NOW FLOWING OVER GOLD
RUN ROAD.
1038 PM HEAVY RAIN 3 E LAFAYETTE 39.99N 105.04W
09/11/2013 M4.52 INCH BROOMFIELD CO TRAINED SPOTTER
2.97 INCHES SO FAR TODAY
1025 PM FLASH FLOOD 9 S BOULDER 39.90N 105.25W
09/11/2013 JEFFERSON CO EMERGENCY MNGR
FLOODING AND DEBRIS HIGHWAY 72 WEST OF HIGHWAY 93 AT THE
BASE OF COAL CREEK CANYON
1000 PM HEAVY RAIN 5 E BOULDER 40.03N 105.16W
09/11/2013 M6.29 INCH BOULDER CO TRAINED SPOTTER
2.35 INCHES PAST 3 HOURS. THE 6.29 INCHES IS THE TOTAL SO
FAR SINCE 5 PM MONDAY
1000 PM HEAVY RAIN 13 NW GOLDEN 39.87N 105.39W
09/11/2013 M2.31 INCH JEFFERSON CO TRAINED SPOTTER
PAST 16 HOURS. BEAVER CREEK IS BANKFULL. COAL CREEK IS
OVERBANK AND WASHING OVER HWY 72 AT TWIN SPRUCE
1000 PM FLASH FLOOD BOULDER 40.03N 105.25W
09/11/2013 BOULDER CO EMERGENCY MNGR
3RD ST AND CANYON AND EASTBOUND BASELINE AT FOOTHILLS
HAVE PARTIAL CLOSURES DUE TO DEBRIS. FLOODING AT 9TH AND
BALSAM.
0920 PM HEAVY RAIN 2 SE BOULDER 40.01N 105.22W
09/11/2013 M3.35 INCH BOULDER CO MESONET
PAST 6 HOURS
0914 PM HEAVY RAIN LYONS 40.22N 105.27W
09/11/2013 M3.50 INCH BOULDER CO BROADCAST MEDIA
PAST 24 HOURS
0846 PM HEAVY RAIN SUPERIOR 39.93N 105.15W
09/11/2013 M1.90 INCH BOULDER CO TRAINED SPOTTER
1.3 INCHES SINCE 5 PM
0830 PM HEAVY RAIN 7 E FORT COLLINS 40.56N 104.93W
09/11/2013 M1.05 INCH WELD CO TRAINED SPOTTER
PAST 25 MINUTES
0803 PM HEAVY RAIN 1 NW LOUISVILLE 39.98N 105.15W
09/11/2013 M1.10 INCH BOULDER CO TRAINED SPOTTER
PAST HOUR
0700 PM HEAVY RAIN 5 NE BOULDER 40.08N 105.18W
09/11/2013 M4.03 INCH BOULDER CO TRAINED SPOTTER
1.41 INCHES PAST 12 HOURS
0650 PM FLASH FLOOD 2 SE NIWOT 40.08N 105.13W
09/11/2013 BOULDER CO NWS EMPLOYEE
WATER AT A DEPTH OF 9 TO 12 INCHES DEEP AND 50 FEET WIDE
WAS RUNNING OVER THE INTERSECTION OF 95TH STREET AND
LOOKOUT ROAD.
0628 PM HEAVY RAIN ERIE 40.03N 105.05W
09/11/2013 M2.50 INCH WELD CO BROADCAST MEDIA
PAST TWO HOURS.
0600 PM HEAVY RAIN 5 NE NORTHGLENN 39.96N 104.91W
09/11/2013 M2.10 INCH ADAMS CO NWS EMPLOYEE
SINCE NOON YESTERDAY
0212 PM HEAVY RAIN GENESEE 39.69N 105.27W
09/11/2013 M4.15 INCH JEFFERSON CO TRAINED SPOTTER
48 HOUR RAINFALL TOTAL
&&
JKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 6:36 PM MDT | Flash Flood Warning | BOU | Boulder, Broomfield, Weld | 3 hr |
| Sep 11, 7:02 PM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Sep 11, 7:23 PM MDT | Areal Flood Advisory | BOU | Larimer, Weld | 3 hr |
| Sep 11, 7:58 PM MDT | Flash Flood Warning | BOU | Adams, Boulder, Broomfield, Weld | 3 hr |
| Sep 11, 8:25 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 11, 8:28 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Sep 11, 8:31 PM MDT | Areal Flood Advisory | BOU | Washington | 119 min |
| Sep 11, 9:46 PM MDT | Flash Flood Warning | BOU | Boulder, Jefferson | 3 hr |
| Sep 11, 9:47 PM MDT | Areal Flood Advisory | BOU | Arapahoe, Denver | 3 hr |
| Sep 11, 9:53 PM MDT | Areal Flood Warning | BOU | Adams, Weld | 3 hr |
| Sep 11, 10:01 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe, Denver | 3 hr |
| Sep 11, 10:16 PM MDT | Areal Flood Advisory | BOU | Larimer, Weld | 3 hr |
| Sep 11, 10:28 PM MDT | Areal Flood Advisory | BOU | Larimer | 3 hr |
| Sep 11, 10:49 PM MDT | Flash Flood Warning | BOU | Larimer | 5 hr |
| Sep 11, 11:42 PM MDT | Flash Flood Warning | BOU | Broomfield | 3 hr |
| Sep 12, 12:02 AM MDT | River Flood Warning | BOU | Boulder | 6 hr |
| Sep 12, 12:02 AM MDT | River Flood Warning | BOU | Boulder | 2 hr |
| Sep 12, 12:02 AM MDT | River Flood Warning | BOU | Boulder | 17 hr |
| Sep 12, 12:31 AM MDT | Flash Flood Warning | BOU | Larimer, Weld | 4 hr |
| Sep 12, 12:37 AM MDT | Areal Flood Advisory | BOU | Adams, Weld | 3 hr |
| Sep 12, 12:59 AM MDT | Areal Flood Warning | BOU | Adams, Arapahoe, Denver | 3 hr |
| Sep 12, 2:04 AM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Sep 12, 2:34 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 2:50 AM MDT | Areal Flood Advisory | BOU | Adams | 3 hr |
| Sep 12, 3:07 AM MDT | Flash Flood Warning | BOU | Weld | 4 hr |
| Sep 12, 4:10 AM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Sep 12, 4:18 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 4:20 AM MDT | Flash Flood Warning | BOU | Adams | 3 hr |
| Sep 12, 4:36 AM MDT | River Flood Advisory | BOU | Larimer | 6 hr |
| Sep 12, 5:00 AM MDT | Flash Flood Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 40 hr |
| Sep 12, 5:24 AM MDT | Areal Flood Advisory | BOU | Adams, Denver | 3 hr |
| Sep 12, 5:59 AM MDT | Areal Flood Warning | BOU | Larimer | 9 hr |
| Sep 12, 6:01 AM MDT | Flash Flood Warning | BOU | Adams, Denver | 3 hr |
| Sep 12, 6:09 AM MDT | River Flood Warning | BOU | Adams | 20 hr |
| Sep 12, 6:09 AM MDT | River Flood Warning | BOU | Weld | 9 days |
| Sep 12, 6:09 AM MDT | River Flood Warning | BOU | Morgan | 6 days |
| Sep 12, 6:09 AM MDT | River Flood Warning | BOU | Logan, Morgan, Washington | 8 days |
| Sep 12, 6:19 AM MDT | River Flood Warning | BOU | Larimer | 14 hr |
| Sep 12, 6:52 AM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| Sep 12, 6:55 AM MDT | Flash Flood Warning | BOU | Adams | 3 hr |
| Sep 12, 7:05 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 7:06 AM MDT | River Flood Warning | BOU | Larimer | 5 days |
| Sep 12, 7:12 AM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Sep 12, 7:24 AM MDT | Flash Flood Warning | BOU | Arapahoe | 3 hr |
| Sep 12, 7:32 AM MDT | Areal Flood Advisory | BOU | Arapahoe | 3 hr |
| Sep 12, 8:28 AM MDT | Areal Flood Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Jefferson and 2 more | 12 hr |
| Sep 12, 8:36 AM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Sep 12, 9:02 AM MDT | Flash Flood Warning | BOU | Adams, Arapahoe, Denver | 3 hr |
| Sep 12, 9:12 AM MDT | Flash Flood Warning | BOU | Arapahoe, Denver | 3 hr |
| Sep 12, 9:51 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 10:02 AM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Sep 12, 10:44 AM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 10:58 AM MDT | River Flood Warning | BOU | Weld | 6 days |
| Sep 12, 12:04 PM MDT | River Flood Warning | BOU | Boulder | 19 hr |
| Sep 12, 12:14 PM MDT | Flash Flood Warning | BOU | Adams, Arapahoe, Denver | 3 hr |
| Sep 12, 12:35 PM MDT | Flash Flood Warning | BOU | Larimer | 9 hr |
| Sep 12, 1:42 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Sep 12, 3:13 PM MDT | Areal Flood Advisory | BOU | Arapahoe, Elbert | 3 hr |
| Sep 12, 3:29 PM MDT | Flash Flood Warning | BOU | Boulder, Jefferson | 8 hr |
| Sep 12, 4:35 PM MDT | River Flood Warning | BOU | Larimer | 4 hr |
| Sep 12, 4:35 PM MDT | River Flood Warning | BOU | Larimer | 4 hr |
| Sep 12, 5:04 PM MDT | Flash Flood Warning | BOU | Arapahoe, Denver, Douglas | 4 hr |
Nearby
Flash Flood Warnings in Colorado, 2013Every flash flood warning in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.