Alert archive / Colorado / Areal Flood Warnings in 2014

Areal Flood Warning 4, NWS Denver/Boulder, CO

May 23, 2014Larimer County, Colorado

NWS Denver/Boulder, CO issued this areal flood warning at May 23, 2014, 10:06 PM MDT for Larimer County, Colorado. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 23, 2014, 10:06 PM MDT (04:06 UTC)
Expired: May 24, 2014, 2:00 AM MDT
In force: 4 hr
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Flood severity: None

County Larimer County, CO

The radar

The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 04:06 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, 4.1 hours before the alert went out and 209 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 530 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1524 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -72 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal 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 areal flood warning went out at May 23, 8:40 PM MDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 23, 8:40 PM MDT, 1 hour 26 minutes before

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Hazardous weather outlook, May 23, 10:36 AM MDT, 11 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1036 AM MDT FRI MAY 23 2014

COZ030>051-241645-
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-
1036 AM MDT FRI MAY 23 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS WILL OCCUR THIS
AFTERNOON INTO THE EVENING HOURS. THE THUNDERSTORM ACTIVITY WILL
NOT BE AS STRONG AS THE PAST FEW DAYS. HOWEVER SOME SMALL HAIL
AND HEAVY RAIN MAY STILL OCCUR WITH SOME OF THE STORMS WITH UP TO
AN INCH OF RAINFALL POSSIBLE.

THE SHOWER AND THUNDERSTORM ACTIVITY SHOULD GRADUALLY END EARLY
THIS EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THERE WILL BE A CHANCE OF SLOW-MOVING THUNDERSTORMS SATURDAY AND
SUNDAY ALTHOUGH THE AVAILABLE MOISTURE WILL BE SLIGHTLY LESS THAN
PREVIOUS DAYS. ON MONDAY...WRAP-AROUND MOISTURE FROM A DEPARTING
STORM SYSTEM WILL BRING A GOOD SHOT OF SHOWERS AND THUNDERSTORMS.
DRIER CONDITIONS CAN BE EXPECTED TUESDAY THROUGH THURSDAY WITH A
SLOW WARMING TREND. ENOUGH MOISTURE WILL BE AROUND FOR DAILY
SHOWERS AND POSSIBLE THUNDERSTORMS IN THE HIGH COUNTRY EACH DAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.

In the hours before

Local storm report, May 23, 8:35 PM MDT, 1 hour 31 minutes before

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Local storm report, May 23, 9:13 PM MDT, 53 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 23, 6:05 PM MDT	Areal Flood Advisory	BOU	Adams, Arapahoe, Denver	115 min
May 23, 7:20 PM MDT	Flash Flood Warning	BOU	Boulder	3 hr
May 23, 7:21 PM MDT	Flash Flood Warning	BOU	Larimer	3 hr
May 23, 8:10 PM MDT	Flash Flood Warning	BOU	Larimer, Weld	3 hr
May 23, 9:20 PM MDT	Areal Flood Advisory	BOU	Weld	4 hr
May 23, 10:10 PM MDT	Flash Flood Warning	BOU	Weld	3 hr
May 23, 10:26 PM MDT	Areal Flood Advisory	BOU	Adams, Denver, Weld	3 hr
May 23, 11:09 PM MDT	Areal Flood Advisory	BOU	Larimer	96 min
May 24, 5:50 AM MDT	Flash Flood Watch	BOU	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more	17 hr
May 24, 4:42 PM MDT	Special Weather Statement	BOU	Grand	33 min
May 24, 5:11 PM MDT	Special Weather Statement	BOU	Jackson	34 min
May 24, 5:37 PM MDT	Special Weather Statement	BOU	Jefferson	23 min
May 24, 5:58 PM MDT	Special Weather Statement	BOU	Douglas	47 min

Nearby

Areal Flood Warnings in Colorado, 2014 Every areal flood warning in 2014

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.