Alert archive / Colorado / Flash Flood Warnings in 2011
Flash Flood Warning 10, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 8, 2011, 10:02 PM MDT for Phillips County, Sedgwick County, Colorado. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2011, 10:02 PM MDT (04:02 UTC)
- Expired
- Jul 9, 2011, 4:00 AM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Phillips County, CO, Sedgwick County, CO
The radar
The Goodland radar (KGLD), 163 km from the middle of the area, began a volume at 04:03 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 (KDNR), launched 00:00Z, 4.0 hours before the alert went out and 129 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
- 112 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 2514 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -124 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
172 WGUS55 KBOU 090402 FFWBOU COC095-115-091000- /O.NEW.KBOU.FF.W.0010.110709T0402Z-110709T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 1002 PM MDT FRI JUL 8 2011 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN SEDGWICK COUNTY IN NORTHEAST COLORADO NORTHERN PHILLIPS COUNTY IN NORTHEAST COLORADO * UNTIL 400 AM MDT SATURDAY * AT 958 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED 3 TO 5 INCHES OF RAIN HAD ALREADY FALLEN IN THE WARNING AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAGES... SIXTEEN-MILE CORNER...PAOLI...FAIRFIELD AND AMHERST. TRAINED SPOTTERS AND LOCAL LAW ENFORCEMENT REPORTED FIELD FLOODING AND SEVERAL COUNTY ROADS IMPASSABLE. THERE IS ANOTHER LINE OF STORMS ACROSS WESTERN LOGAN COUNTY WHICH WILL MOVE THROUGH THE AREA THROUGH MIDNIGHT WITH ADDITONAL RAINFALL. THE EXTENT OF THE FLOODING IS UNKNOWN AT THIS TIME. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM MDT FRIDAY EVENING FOR NORTHEASTERN COLORADO. && LAT...LON 4094 10206 4063 10206 4054 10255 4078 10261 $$
3 follow-up statements
926 WGUS75 KBOU 090449 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1049 PM MDT FRI JUL 8 2011 COC095-115-091000- /O.CON.KBOU.FF.W.0010.000000T0000Z-110709T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SEDGWICK CO-PHILLIPS CO- 1049 PM MDT FRI JUL 8 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM MDT FOR NORTHERN PHILLIPS AND SOUTHERN SEDGWICK COUNTIES... AT 1046 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LIN OF THUNDERTORMS PRODUCING HEAVY RAIN MOVING EASTWARD ACROSS SOUTHERN SEDGWICK AND NORTHERN PHILLIPS COUNTIES. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAGES...SIXTEEN-MILE CORNER...PAOLI...FAIRFIELD AND AMHERST. DOPPLER RADAR ESTIMATES THAT OVER 5 INCHES OF RAIN HAS FALLEN OVER SOUTHEASTERN SEDGWICK AND NORTHEASTERN PHILLIPS COUNTY THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER CLIMB TO HIGHER GROUND. && LAT...LON 4094 10206 4063 10206 4054 10255 4078 10261 $$
627 WGUS75 KBOU 090647 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1247 AM MDT SAT JUL 9 2011 COC095-115-091000- /O.CON.KBOU.FF.W.0010.000000T0000Z-110709T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SEDGWICK CO-PHILLIPS CO- 1247 AM MDT SAT JUL 9 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 AM MDT FOR NORTHERN PHILLIPS AND SOUTHERN SEDGWICK COUNTIES... AT 1244 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED ONLY LIGHT RAIN REMAINED OVER NORTHERN PHILLIPS AND SOUTHERN SEDGWICK COUNTIES. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAGES...SIXTEEN-MILE CORNER...PAOLI...FAIRFIELD AND AMHERST. DOPPLER RADAR ESTIMATES THAT OVER 6 INCHES OF RAIN HAS FALLEN OVER SOUTHEASTERN SEDGWICK AND NORTHEASTERN PHILLIPS COUNTIES EARLIER TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS ESPECIALLY SAND AND WILDHORSE CREEKS...COUNTRY ROADS...NORMALLY DRY WASHES AND ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER CLIMB TO HIGHER GROUND. && LAT...LON 4094 10206 4063 10206 4054 10255 4078 10261 $$
143 WGUS75 KBOU 090957 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 357 AM MDT SAT JUL 9 2011 COC095-115-091007- /O.EXP.KBOU.FF.W.0010.000000T0000Z-110709T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SEDGWICK CO-PHILLIPS CO- 357 AM MDT SAT JUL 9 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 AM MDT FOR NORTHERN PHILLIPS AND SOUTHERN SEDGWICK COUNTIES... FLOOD WATERS HAVE SUBSIDED AND FLASH FLOODING IS NO LONGER EXPECTED. LAT...LON 4094 10206 4063 10206 4054 10255 4078 10261 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 6:04 PM MDT | Severe Thunderstorm Warning | BOU | Phillips, Sedgwick | 56 min |
| Jul 8, 6:10 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 31 min |
| Jul 8, 6:42 PM MDT | Areal Flood Advisory | BOU | Phillips, Sedgwick | 93 min |
| Jul 8, 7:04 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver, Jefferson | 45 min |
| Jul 8, 7:18 PM MDT | Areal Flood Advisory | BOU | Adams, Boulder, Broomfield, Jefferson, Weld | 3 hr |
| Jul 8, 8:11 PM MDT | Severe Thunderstorm Warning | BOU | Phillips, Sedgwick | 34 min |
| Jul 8, 9:03 PM MDT | Areal Flood Advisory | BOU | Phillips, Sedgwick | 61 min |
| Jul 8, 10:33 PM MDT | Flash Flood Warning | BOU | Washington | 4 hr |
| Jul 8, 11:49 PM MDT | River Flood Advisory | BOU | Weld | 5 hr |
| Jul 9, 12:02 AM MDT | Areal Flood Advisory | BOU | Larimer | 66 hr |
| Jul 9, 2:34 AM MDT | Areal Flood Advisory | BOU | Washington | 3 hr |
| Jul 9, 4:12 PM MDT | Special Weather Statement | BOU | Boulder | 63 min |
Nearby
Flash Flood Warnings in Colorado, 2011Every flash flood warning in 2011
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.