Alert archive / Colorado / River Flood Warnings in 2015
River Flood Warning 12, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this river flood warning at May 23, 2015, 6:27 PM MDT for Logan County, Morgan County, Washington County, Colorado. It took effect at May 24, 2015, 9:00 AM MDT. It was in force for 57 hr.
The area
The counties it named.
The facts
- Issued
- May 23, 2015, 6:27 PM MDT (00:27 UTC)
- In effect from
- May 24, 2015, 9:00 AM MDT
- Expired
- May 26, 2015, 6:00 PM MDT
- In force
- 57 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Logan County, CO, Morgan County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 116 km from the middle of the area, began a volume at 00:29 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 river
Written for the forecast point South Platte River near Balzac (BZNC2).
- Action stage
- 8 ft
- Minor stage
- 10 ft
- Moderate stage
- 11 ft
- Major stage
- 12.5 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river 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 river flood warning went out at May 23, 3:21 PM MDT, 3 hours 6 minutes earlier.
Area forecast discussion, May 23, 3:21 PM MDT, 3 hours 6 minutes before
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</html>Hazardous weather outlook, May 23, 11:11 AM MDT, 7 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1111 AM MDT SAT MAY 23 2015 COZ030>051-241715- 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- 1111 AM MDT SAT MAY 23 2015 ...STRONG THUNDERSTORMS EXPECTED TO MOVE OVER NORTHEAST COLORADO THIS AFTERNOON... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT AN UPPER LEVEL STORM SYSTEM OVER EASTERN UTAH TODAY WILL MOVE SLOWLY INTO WESTERN COLORADO BY TONIGHT. THIS SYSTEM WILL COMBINE WITH ABUNDANT MOISTURE ACROSS EASTERN COLORADO TO PRODUCE ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ACROSS MUCH OF THE AREA THIS AFTERNOON AND EARLY EVENING. A FEW SEVERE STORMS WILL BE POSSIBLE OVER THE PLAINS OF NORTHEAST COLORADO THROUGH THE AFTERNOON WITH LARGE HAIL AND A FEW TORNADOES. IN ADDITION...THUNDERSTORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL WITH 1 TO 2 INCHES OF RAIN IN 30 MINUTES OR LESS. WHEN THE HEAVY RAINS DEVELOP...FLASH FLOODING WILL QUICKLY RESULT DUE TO THE SATURATED SOIL CONDITIONS. PEOPLE SHOULD REMAIN ALERT FOR RAPIDLY CHANGING CONDITIONS THROUGH THE AFTERNOON. THUNDERSTORMS WILL GENERALLY BE MOVING FROM SOUTH TO NORTH...AND MULTIPLE WAVES OF STORMS WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SUBTLE DAY TO DAY TEMPERATURE AND PRECIPITATION CHANCES ARE IN STORE FOR THE FORECAST AREA DURING THE UPCOMING WEEK. SUNDAY AND WEDNESDAY WILL HAVE THE BEST CHANCE OF SHOWERS AND THUNDERSTORMS WITH PASSING WEATHER SYSTEMS. MONDAY AND TUESDAY WILL BE DRIER AND WARMER WITH A PASSING HIGH PRESSURE RIDGE. ALTHOUGH DAYTIME HEATING AND RESIDUAL MOISTURE ARE LIKELY TO PRODUCE SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS BOTH DAYS... MAINLY OVER AND NEAR THE MOUNTAINS. BY LATE IN THE WEEK...WETTER AND COOLER CONDITIONS COULD RETURN WITH UPSLOPE FLOW AND A PASSING PACIFIC STORM SYSTEM. TEMPERATURES THROUGH THE PERIOD WILL RANGE FROM NEAR TO SLIGHTLY BELOW AVERAGE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE NEEDED OVER NORTHEAST COLORADO THROUGH THE AFTERNOON.
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 8:18 PM MDT | Areal Flood Advisory | BOU | Logan | 3 hr |
| May 23, 10:20 PM MDT | Flash Flood Warning | BOU | Logan | 5 hr |
| May 24, 2:10 AM MDT | Areal Flood Warning | BOU | Logan | 18 hr |
| May 24, 4:44 AM MDT | Flash Flood Watch | BOU | Adams, Arapahoe, Elbert, Lincoln, Logan, Morgan and 4 more | 14 hr |
| May 24, 11:22 AM MDT | Areal Flood Advisory | BOU | Elbert | 3 hr |
| May 24, 11:57 AM MDT | Flash Flood Warning | BOU | Arapahoe, Elbert | 3 hr |
| May 24, 12:08 PM MDT | Special Weather Statement | BOU | Arapahoe | 37 min |
| May 24, 12:15 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 15 min |
| May 24, 12:33 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 27 min |
| May 24, 1:00 PM MDT | Tornado Warning | BOU | Arapahoe | 18 min |
| May 24, 1:23 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe | 3 hr |
| May 24, 1:25 PM MDT | Special Weather Statement | BOU | Adams | 35 min |
| May 24, 2:17 PM MDT | Special Weather Statement | BOU | Washington | 28 min |
| May 24, 2:43 PM MDT | Areal Flood Advisory | BOU | Adams, Morgan, Washington | 3 hr |
| May 24, 3:15 PM MDT | Special Weather Statement | BOU | Washington | 30 min |
Nearby
River Flood Warnings in Colorado, 2015Every river flood warning in 2015
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.