Alert archive / Colorado / Flash Flood Watches in 2013
Flash Flood Watch 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood watch at Jul 14, 2013, 4:45 AM MDT for 7 counties in Colorado. It took effect at Jul 14, 2013, 12:00 PM MDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2013, 4:45 AM MDT (10:45 UTC)
- In effect from
- Jul 14, 2013, 12:00 PM MDT
- Expired
- Jul 15, 2013, 12:00 AM MDT
- In force
- 12 hr
- Issued by
- NWS Denver/Boulder, CO
- Flood severity
- None
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO
The radar
The Denver radar (KFTG), 74 km from the middle of the area, began a volume at 10:44 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 10.8 hours before the alert went out and 435 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
- 761 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 2892 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Jul 14, 3:07 AM MDT, 1 hour 38 minutes earlier.
Area forecast discussion, Jul 14, 3:07 AM MDT, 1 hour 38 minutes before
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</html>Hazardous weather outlook, Jul 13, 10:37 AM MDT, 18 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1037 AM MDT SAT JUL 13 2013 COZ030>051-141645- 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- 1037 AM MDT SAT JUL 13 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL AGAIN DEVELOP AROUND NOON OVER THE MOUNTAINS AND FOOTHILLS...BEFORE SPREADING EAST ONTO THE PLAINS DURING THE AFTERNOON AND EVENING. EXPECT HEAVY RAIN...SMALL HAIL AND GUSTY WINDS. RAINFALL RATES UP TO ONE INCH IN 30 MINUTES OR EVEN LESS WILL BE POSSIBLE WITH THE STRONGER STORMS. THE FIRE BURN AREAS WILL BE SUSCEPTIBLE TO FLASH FLOODING DUE TO THE HIGHER MOISTURE CONTENT AND RELATIVELY SLOW STORM MOTIONS. STORMS WILL GRADUALLY DIMINISH BY LATER THIS EVENING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SHOWERS AND THUNDERSTORMS WILL DEVELOP AGAIN ON SUNDAY AND ARE LIKELY TO BE MORE NUMEROUS ESPECIALLY OVER AND ALONG THE FRONT RANGE. THESE SLOW MOVING STORMS WILL BE CAPABLE OF HEAVY RAINFALL DURING THE AFTERNOON AND EVENING HOURS. RAINFALL RATES UP TO 2 INCHES IN ONE HOUR WILL BE POSSIBLE WITH THE STRONGEST STORMS. THESE RAINFALL AMOUNTS WOULD PRODUCE ADDITIONAL FLASH FLOODING CONCERNS IN BURN SCARS...WITH POSSIBLE FLOODING IN URBANIZED AREAS AS WELL. SHOWERS AND THUNDERSTORMS COULD LINGER ALL NIGHT...WITH STORMS ENDING IN MOST AREAS MONDAY MORNING. DRIER AIR WILL THEN SPREAD OVER THE REGION BEGINNING MONDAY AFTERNOON...WITH ONLY A SLIGHT CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS MAINLY IN THE HIGH COUNTRY THROUGH THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT...HOWEVER HEAVY RAINFALL AND FLOODING REPORTS WILL BE APPRECIATED. RJK/BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:11 PM MDT | Flash Flood Warning | BOU | Lincoln | 3 hr |
| Jul 13, 7:25 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 50 min |
| Jul 13, 7:37 PM MDT | Areal Flood Advisory | BOU | Washington | 113 min |
| Jul 13, 10:06 PM MDT | Areal Flood Advisory | BOU | Lincoln | 3 hr |
| Jul 14, 2:30 PM MDT | Areal Flood Advisory | BOU | Larimer | 2 hr |
| Jul 14, 4:05 PM MDT | Areal Flood Advisory | BOU | Larimer | 115 min |
Nearby
Flash Flood Watches in Colorado, 2013Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.