Alert archive / Colorado / Flash Flood Watches in 2018
Flash Flood Watch 2, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood watch at Jul 5, 2018, 3:30 PM MDT for 7 counties in Colorado. It took effect at Jul 6, 2018, 12:00 PM MDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 5, 2018, 3:30 PM MDT (21:30 UTC)
- In effect from
- Jul 6, 2018, 12:00 PM MDT
- Expired
- Jul 6, 2018, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Grand Junction, CO
- Flood severity
- None
Counties Archuleta County, CO, Dolores County, CO, Hinsdale County, CO, La Plata County, CO, Montezuma County, CO, San Juan County, CO, San Miguel County, CO
The radar
The Grand Junction radar (KGJX), 165 km from the middle of the area, began a volume at 21:34 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
Grand Junction, CO (KGJT), launched 12:00Z, 9.5 hours before the alert went out and 178 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
- 3627 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 99 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 watch 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 watch went out at Jul 5, 12:14 PM MDT, 3 hours 16 minutes earlier.
Area forecast discussion, Jul 5, 12:14 PM MDT, 3 hours 16 minutes before
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</html>Hazardous weather outlook, Jul 5, 6:48 AM MDT, 8 hours 42 minutes before
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Flash Flood Watches in Colorado, 2018Every flash flood watch in 2018
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.