Alert archive / Montana / Red Flag Warnings in 2019

Red Flag Warning 6, NWS Great Falls, MT

August 1, 201918 counties in Montana

NWS Great Falls, MT issued this red flag warning at Aug 1, 2019, 2:15 PM MDT for 18 counties in Montana. It took effect at Aug 2, 2019, 12:00 PM MDT. It was in force for 11 hr. 5 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Aug 1, 2019, 2:15 PM MDT (20:15 UTC)
In effect from
Aug 2, 2019, 12:00 PM MDT
Expired
Aug 2, 2019, 11:00 PM MDT
In force
11 hr
Issued by
NWS Great Falls, MT

Counties Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Gallatin County, MT, Glacier County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Phillips County, MT, Pondera County, MT, Powell County, MT, Teton County, MT, Toole County, MT

The radar

The Great Falls radar (KTFX), 24 km from the middle of the area, began a volume at 20:18 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.

What was reported inside it

TimeReportWhereRemark
Aug 2, 2:00 PM MDTHAIL 0.25Cut Bank, MT
Aug 2, 4:05 PM MDTTSTM WND GST 515 Sse Finn, MTMESONET STATION MTAVN AVON NORTH MT-141 MP 8.1.
Aug 2, 6:30 PM MDTTSTM WND GST 484 Nnw Racetrack, MTDRLM AGRIMET STATION.
Aug 2, 6:41 PM MDTTSTM WND GST 625 Wsw Great Falls, MT
Aug 2, 8:22 PM MDTTSTM WND GST 501 N Loma, MTOUTFLOW FROM THUNDERSTORMS. MESONET STATION MTLOM LOMA MDT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 8.3 hours before the alert went out and 37 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.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 12:00Z on 2019-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 113 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 12:00Z on 2019-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
113 J/kg
Mixed-layer CIN
-396 J/kg
Mixed-layer LCL
2327 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Great Falls, MT wrote its last area forecast discussion before this red flag warning went out at Jul 31, 5:40 PM MDT, 20 hours 35 minutes earlier.

Area forecast discussion, Jul 31, 5:40 PM MDT, 20 hours 35 minutes before
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The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 31, 6:16 PM MDTSpecial Weather StatementTFXLiberty44 min
Jul 31, 6:58 PM MDTSpecial Weather StatementTFXBroadwater47 min
Jul 31, 7:27 PM MDTSpecial Weather StatementTFXBroadwater48 min
Jul 31, 9:30 PM MDTSpecial Weather StatementTFXLewis and Clark45 min
Jul 31, 10:16 PM MDTSpecial Weather StatementTFXLewis and Clark44 min
Jul 31, 10:52 PM MDTSpecial Weather StatementTFXCascade, Teton38 min
Jul 31, 11:24 PM MDTSpecial Weather StatementTFXCascade, Teton36 min
Jul 31, 11:58 PM MDTSpecial Weather StatementTFXChouteau, Judith Basin47 min
Aug 1, 12:04 AM MDTSpecial Weather StatementTFX41 min
Aug 1, 12:06 AM MDTSpecial Weather StatementTFX24 min
Aug 1, 12:46 AM MDTSpecial Weather StatementTFXChouteau, Hill, Liberty, Toole44 min
Aug 1, 2:50 AM MDTFire Weather WatchTFXBlaine, Glacier, Hill, Liberty, Phillips, Pondera and 1 more11 hr
Aug 1, 12:06 PM MDTSpecial Weather StatementTFXBeaverhead, Madison54 min
Aug 1, 1:04 PM MDTSpecial Weather StatementTFXBeaverhead, Gallatin, Madison41 min
Aug 1, 1:47 PM MDTSpecial Weather StatementTFXBroadwater43 min
Aug 1, 1:56 PM MDTSpecial Weather StatementTFXGallatin64 min
Aug 1, 2:28 PM MDTSpecial Weather StatementTFXGallatin47 min
Aug 1, 2:34 PM MDTSpecial Weather StatementTFXBroadwater41 min
Aug 1, 2:43 PM MDTSpecial Weather StatementTFXWheatland47 min
Aug 1, 2:53 PM MDTSpecial Weather StatementTFXBroadwater52 min
Aug 1, 3:07 PM MDTSpecial Weather StatementTFXGolden Valley38 min
Aug 1, 3:22 PM MDTSpecial Weather StatementTFX23 min
Aug 1, 3:37 PM MDTSpecial Weather StatementTFXMadison38 min
Aug 1, 3:45 PM MDTSpecial Weather StatementTFXFergus45 min
Aug 1, 3:54 PM MDTSpecial Weather StatementTFXBroadwater36 min
Aug 1, 4:19 PM MDTSpecial Weather StatementTFXMadison41 min
Aug 1, 4:30 PM MDTSpecial Weather StatementTFXBeaverhead30 min
Aug 1, 4:48 PM MDTSpecial Weather StatementTFXBroadwater27 min
Aug 1, 4:57 PM MDTSpecial Weather StatementTFXBeaverhead33 min
Aug 1, 5:02 PM MDTSpecial Weather StatementTFX43 min
Aug 1, 5:29 PM MDTSpecial Weather StatementTFXJudith Basin46 min
Aug 1, 5:35 PM MDTSpecial Weather StatementTFXCascade25 min

Nearby

Red Flag Warnings in Montana, 2019Every red flag warning in 2019

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.