Alert archive / Colorado / Flash Flood Warnings in 2016
Flash Flood Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 30, 2016, 8:20 PM MDT for Adams County, Colorado. It was in force for 3 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
- Aug 30, 2016, 8:20 PM MDT (02:20 UTC)
- Expired
- Aug 30, 2016, 11:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Adams County, CO
The radar
The Denver radar (KFTG), 38 km from the middle of the area, began a volume at 02:21 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, 2.3 hours before the alert went out and 150 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
- 88 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 2313 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
022
WGUS55 KBOU 310220
FFWBOU
COC001-310515-
/O.NEW.KBOU.FF.W.0007.160831T0220Z-160831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
820 PM MDT TUE AUG 30 2016
THE NATIONAL WEATHER SERVICE IN DENVER COLORADO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WEST CENTRAL ADAMS COUNTY IN NORTHEASTERN COLORADO...
* UNTIL 1115 PM MDT
* AT 818 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
ALREADY FALLEN...AND ANOTHER INCH OF RAIN CAN BE EXPECTED BEFORE
DECREASING. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SOUTHWESTERN THORNTON...SOUTHERN WESTMINSTER...
SOUTHWESTERN COMMERCE CITY AND FEDERAL HEIGHTS.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...CLEAR CREEK AND
LITTLE DRY CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. TURN AROUND DONT DROWN.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3986 10499 3979 10494 3979 10497 3980 10497
3979 10498 3979 10502 3986 10502
$$
BARJENBRUCH2 follow-up statements
409
WGUS75 KBOU 310311
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
911 PM MDT TUE AUG 30 2016
COC001-310515-
/O.CON.KBOU.FF.W.0007.000000T0000Z-160831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS CO-
911 PM MDT TUE AUG 30 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT FOR
WEST CENTRAL ADAMS COUNTY...
AT 910 PM MDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING NEAR
72ND AND PECOS IN FAR SOUTHERN WESTMINSTER. UP TO TWO INCHES OF
RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS OCCURRING. THUNDERSTORMS
WITH HEAVY RAIN CONTINUE IN THE FLASH FLOOD AREA.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SOUTHWESTERN THORNTON...SOUTHERN WESTMINSTER...SOUTHWESTERN COMMERCE
CITY AND FEDERAL HEIGHTS.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...CLEAR CREEK...
SOUTH PLATTE RIVER AND LITTLE DRY CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
&&
LAT...LON 3986 10499 3979 10494 3979 10497 3980 10497
3979 10498 3979 10502 3986 10502
$$
BARJENBRUCH349
WGUS75 KBOU 310504
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1104 PM MDT TUE AUG 30 2016
COC001-310514-
/O.CAN.KBOU.FF.W.0007.000000T0000Z-160831T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS CO-
1104 PM MDT TUE AUG 30 2016
...THE FLASH FLOOD WARNING FOR WEST CENTRAL ADAMS COUNTY IS
CANCELLED...
THE HEAVY RAIN HAS ENDED AND FLOOD WATERS HAVE RECEDED. FLOODING IS
NO LONGER EXPECTED TO POSE A THREAT. COUNTY OFFICIALS REPORTED NO
FLOODING AT THIS TIME.
LAT...LON 3986 10499 3979 10494 3979 10497 3980 10497
3979 10498 3979 10502 3986 10502
$$
ENTREKINThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 7:14 PM MDT | Special Weather Statement | BOU | Douglas | 46 min |
| Aug 30, 7:30 PM MDT | Areal Flood Advisory | BOU | Arapahoe, Denver, Douglas | 2 hr |
| Aug 30, 7:54 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver, Jefferson | 36 min |
| Aug 30, 8:06 PM MDT | Areal Flood Advisory | BOU | Adams, Jefferson | 3 hr |
| Aug 30, 8:55 PM MDT | Areal Flood Advisory | BOU | Boulder, Gilpin, Jefferson | 2 hr |
| Aug 30, 9:25 PM MDT | Flash Flood Warning | BOU | Boulder | 3 hr |
| Aug 30, 9:34 PM MDT | Areal Flood Advisory | BOU | Arapahoe | 116 min |
Nearby
Flash Flood Warnings in Colorado, 2016Every flash flood warning in 2016
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.