Alert archive / Colorado / Flash Flood Warnings in 2016
Flash Flood Warning 4, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 19, 2016, 7:09 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 96 min. 1 report 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
- Jul 19, 2016, 7:09 PM MDT (01:09 UTC)
- Expired
- Jul 19, 2016, 8:45 PM MDT
- In force
- 96 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adams County, CO, Arapahoe County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 26 km from the middle of the area, began a volume at 01:10 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 |
|---|---|---|---|
| Jul 19, 7:27 PM MDT | FLASH FLOOD | Denver, CO | EXTENSIVE STREET FLOODING AT DEPTHS OVER 1 FOOT ALONG WITH NUMEROUS IMPASSABLE ROADWAYS AND INTERSECTIONS ACROSS METRO DENVER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 1.2 hours before the alert went out and 138 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
- 691 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 2869 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
219 WGUS55 KBOU 200109 FFWBOU COC001-005-031-200245- /O.NEW.KBOU.FF.W.0004.160720T0109Z-160720T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 709 PM MDT TUE JUL 19 2016 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHWESTERN ARAPAHOE COUNTY IN NORTHEASTERN COLORADO... SOUTHWESTERN ADAMS COUNTY IN NORTHEASTERN COLORADO... DENVER COUNTY IN NORTHEASTERN COLORADO... * UNTIL 845 PM MDT * AT 708 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO 1.5 INCHES OF RAIN HAS ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DENVER...AURORA...SOUTHERN THORNTON...SOUTHERN WESTMINSTER... NORTHWESTERN CENTENNIAL...COMMERCE CITY...LITTLETON...NORTHGLENN... ENGLEWOOD...GREENWOOD VILLAGE...FEDERAL HEIGHTS... DENVER INTERNATIONAL AIRPORT...SHERIDAN... D.I.A TERMINAL AND CONCOURSES AND BUCKLEY AFB. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. && LAT...LON 3962 10480 3957 10505 3990 10504 3989 10449 $$ TH
2 follow-up statements
015 WGUS75 KBOU 200132 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 732 PM MDT TUE JUL 19 2016 COC001-005-031-200245- /O.CON.KBOU.FF.W.0004.000000T0000Z-160720T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ARAPAHOE CO-ADAMS CO-DENVER CO- 732 PM MDT TUE JUL 19 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR WESTERN ARAPAHOE...SOUTHWESTERN ADAMS AND DENVER COUNTIES... AT 728 PM MDT...DENVER OFFICIALS REPORTED EXTENSIVE FLOODING OF UNDERPASSES AND STREETS IN DENVER. 0.5 TO 1.5 INCHES OF RAIN HAVE FALLEN IN SOUTHERN DENVER AND EXTREME SOUTHWEST ARAPAHOE COUNTIES. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DENVER...AURORA...SOUTHERN THORNTON...SOUTHERN WESTMINSTER... NORTHWESTERN CENTENNIAL...COMMERCE CITY...LITTLETON...NORTHGLENN... ENGLEWOOD...GREENWOOD VILLAGE...FEDERAL HEIGHTS... DENVER INTERNATIONAL AIRPORT...SHERIDAN... D.I.A TERMINAL AND CONCOURSES AND BUCKLEY AFB. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY. RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE PRECAUTIONS TO PROTECT LIFE AND PROPERTY. && LAT...LON 3962 10480 3957 10505 3990 10504 3989 10449 $$ TH
452 WGUS75 KBOU 200200 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 800 PM MDT TUE JUL 19 2016 COC001-005-031-200210- /O.CAN.KBOU.FF.W.0004.000000T0000Z-160720T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ARAPAHOE CO-ADAMS CO-DENVER CO- 800 PM MDT TUE JUL 19 2016 ...THE FLASH FLOOD WARNING FOR WESTERN ARAPAHOE...SOUTHWESTERN ADAMS AND DENVER COUNTIES IS CANCELLED... THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. LAT...LON 3962 10480 3957 10505 3990 10504 3989 10449 $$ TH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 6:07 PM MDT | Areal Flood Advisory | BOU | Gilpin, Jefferson | 83 min |
| Jul 19, 6:17 PM MDT | Areal Flood Advisory | BOU | Boulder | 58 min |
| Jul 19, 6:36 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 29 min |
| Jul 19, 6:50 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Denver | 13 min |
| Jul 19, 6:56 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe, Denver | 94 min |
| Jul 19, 7:38 PM MDT | Areal Flood Advisory | BOU | Larimer | 97 min |
| Jul 19, 10:11 PM MDT | Special Weather Statement | BOU | Logan | 34 min |
| Jul 19, 10:42 PM MDT | Special Weather Statement | BOU | Logan | 33 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.