Alert archive / Montana / Flash Flood Watches in 2021
Flash Flood Watch 1, NWS Glasgow, MT
NWS Glasgow, MT issued this flash flood watch at Jun 8, 2021, 3:07 AM MDT for 5 counties in Montana. It took effect at Jun 8, 2021, 2:00 PM MDT. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Jun 8, 2021, 3:07 AM MDT (09:07 UTC)
- In effect from
- Jun 8, 2021, 2:00 PM MDT
- Expired
- Jun 9, 2021, 2:59 AM MDT
- In force
- 13 hr
- Issued by
- NWS Glasgow, MT
- Flood severity
- None
Counties Daniels County, MT, Phillips County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT
The radar
The Glasgow radar (KGGW), 60 km from the middle of the area, began a volume at 09:09 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
Bismarck Municip, ND (KBIS), launched 00:00Z, 9.1 hours before the alert went out and 436 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
- 1478 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 2452 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.5
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 Glasgow, MT wrote its last area forecast discussion before this flash flood watch went out at Jun 7, 3:26 PM MDT, 11 hours 41 minutes earlier.
Area forecast discussion, Jun 7, 3:26 PM MDT, 11 hours 41 minutes before
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</html>The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 4:13 PM MDT | Special Weather Statement | GGW | Phillips | 47 min |
| Jun 8, 4:30 PM MDT | Special Weather Statement | GGW | Wibaux | 45 min |
| Jun 8, 4:37 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Wibaux | 53 min |
| Jun 8, 5:01 PM MDT | Special Weather Statement | GGW | 44 min | |
| Jun 8, 5:11 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 64 min |
| Jun 8, 5:27 PM MDT | Severe Thunderstorm Warning | GGW | Dawson, Richland, Roosevelt, Wibaux | 63 min |
| Jun 8, 5:29 PM MDT | Special Weather Statement | GGW | Valley | 46 min |
| Jun 8, 5:32 PM MDT | Special Weather Statement | GGW | Wibaux | 43 min |
| Jun 8, 5:57 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 63 min |
Nearby
Flash Flood Watches in Montana, 2021Every flash flood watch in 2021
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.