Alert archive / Colorado / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 22, NWS Grand Junction, CO
NWS Grand Junction, CO issued this severe thunderstorm warning at Oct 4, 2018, 9:12 AM MDT for Garfield County, Mesa County, Colorado. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Oct 4, 2018, 9:12 AM MDT (15:12 UTC)
- Expired
- Oct 4, 2018, 9:45 AM MDT
- In force
- 33 min
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Garfield County, CO, Mesa County, CO
The radar
The Grand Junction radar (KGJX), 27 km from the middle of the area, began a volume at 15:14 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, 3.2 hours before the alert went out and 34 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
- 272 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 1296 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.6
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 4, 3:54 AM MDT | Special Weather Statement | GJT | Moffat | 51 min |
| Oct 4, 8:15 AM MDT | Special Weather Statement | GJT | 45 min | |
| Oct 4, 8:53 AM MDT | Special Weather Statement | GJT | Mesa | 52 min |
| Oct 4, 9:36 AM MDT | Areal Flood Advisory | GJT | Garfield, Mesa | 6 hr |
| Oct 4, 9:40 AM MDT | Severe Thunderstorm Warning | GJT | Garfield, Mesa | 35 min |
| Oct 4, 9:41 AM MDT | Areal Flood Advisory | GJT | Delta, Mesa, Montrose | 3 hr |
| Oct 4, 9:46 AM MDT | Severe Thunderstorm Warning | GJT | Garfield, Rio Blanco | 29 min |
| Oct 4, 9:47 AM MDT | Areal Flood Advisory | GJT | Mesa | 3 hr |
| Oct 4, 10:05 AM MDT | Severe Thunderstorm Warning | GJT | Delta, Garfield, Mesa | 25 min |
| Oct 4, 10:26 AM MDT | Areal Flood Advisory | GJT | Mesa | 3 hr |
| Oct 4, 10:34 AM MDT | Special Weather Statement | GJT | Delta | 26 min |
| Oct 4, 10:48 AM MDT | Special Weather Statement | GJT | Rio Blanco | 27 min |
| Oct 4, 10:51 AM MDT | Special Weather Statement | GJT | Garfield | 39 min |
| Oct 4, 11:02 AM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 28 min |
| Oct 4, 11:06 AM MDT | Severe Thunderstorm Warning | GJT | Eagle, Garfield, Mesa, Moffat, Rio Blanco, Routt | 39 min |
| Oct 4, 11:26 AM MDT | Areal Flood Advisory | GJT | Rio Blanco | 3 hr |
| Oct 4, 11:33 AM MDT | Flash Flood Watch | GJT | Archuleta, Dolores, Eagle, Garfield, Hinsdale, La Plata and 4 more | 6 hr |
| Oct 4, 11:35 AM MDT | Severe Thunderstorm Warning | GJT | Moffat, Routt | 25 min |
| Oct 4, 12:00 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Routt | 45 min |
| Oct 4, 2:53 PM MDT | Areal Flood Advisory | GJT | Moffat | 42 min |
| Oct 4, 7:35 AM MDT | Special Weather Statement | GJT | San Juan | 40 min |
| Oct 4, 7:45 AM MDT | Special Weather Statement | GJT | Grand | 30 min |
| Oct 4, 8:04 AM MDT | Special Weather Statement | GJT | Grand | 26 min |
| Oct 4, 8:22 AM MDT | Special Weather Statement | GJT | Grand | 23 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2018Every severe thunderstorm warning 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.