Alert archive / Colorado / Flash Flood Warnings in 2015
Flash Flood Warning 1, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at May 6, 2015, 4:11 PM MDT for 8 counties in 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 counties it named.
The facts
- Issued
- May 6, 2015, 4:11 PM MDT (22:11 UTC)
- Expired
- May 6, 2015, 7:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Delta County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Mesa County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO
The radar
The Grand Junction radar (KGJX), 73 km from the middle of the area, began a volume at 22:13 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 12:00Z, 10.2 hours before the alert went out and 370 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Junction, CO wrote its last area forecast discussion before this flash flood warning went out at May 6, 3:09 PM MDT, 1 hour 2 minutes earlier.
Area forecast discussion, May 6, 3:09 PM MDT, 1 hour 2 minutes before
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</html>Hazardous weather outlook, May 6, 4:37 AM MDT, 11 hours 34 minutes before
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
In the hours before
Local storm report, May 6, 3:03 PM MDT, 1 hour 8 minutes before
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</html>Local storm report, May 6, 3:15 PM MDT, 56 minutes before
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</html>Local storm report, May 6, 3:45 PM MDT, 26 minutes before
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</html>Local storm report, May 6, 3:48 PM MDT, 23 minutes before
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</html>Local storm report, May 6, 3:51 PM MDT, 20 minutes before
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</html>Local storm report, May 6, 3:57 PM MDT, 14 minutes before
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</html>The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 1:17 PM MDT | Areal Flood Advisory | GJT | Delta | 6 hr |
| May 6, 1:53 PM MDT | Areal Flood Advisory | GJT | Delta | 6 hr |
| May 6, 5:22 PM MDT | Special Weather Statement | GJT | Grand | 38 min |
Nearby
Flash Flood Warnings in Colorado, 2015Every flash 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.