Alert archive / Montana / Special Weather Statements in 2018

Special Weather Statement, NWS Billings, MT

August 2, 2018Park County, Montana

NWS Billings, MT issued this special weather statement at Aug 2, 2018, 5:31 PM MDT for Park County, Montana. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 2, 2018, 5:31 PM MDT (23:31 UTC)
Expired
Aug 2, 2018, 6:30 PM MDT
In force
59 min
Issued by
NWS Billings, MT

County Park County, MT

The radar

The Billings radar (KBLX), 182 km from the middle of the area, began a volume at 23:34 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

Riverton, WY (KRIW), launched 12:00Z, 11.5 hours before the alert went out and 313 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, Riverton, WY at 12:00Z on 2018-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2018-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 104 square meters per square second.19395878Sfc1 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
9 J/kg
Mixed-layer CIN
-355 J/kg
Mixed-layer LCL
2881 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
104 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

NWS Billings, MT wrote its last area forecast discussion before this special weather statement went out at Aug 2, 3:29 PM MDT, 2 hours 2 minutes earlier.

Area forecast discussion, Aug 2, 3:29 PM MDT, 2 hours 2 minutes before
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Hazardous weather outlook, Aug 2, 3:36 PM MDT, 1 hour 55 minutes before
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In the hours before

Special weather statement, Aug 2, 3:35 PM MDT, 1 hour 56 minutes before
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Special weather statement, Aug 2, 3:42 PM MDT, 1 hour 49 minutes before
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Special weather statement, Aug 2, 4:06 PM MDT, 1 hour 25 minutes before
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Special weather statement, Aug 2, 4:28 PM MDT, 1 hour 3 minutes before
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Special weather statement, Aug 2, 5:02 PM MDT, 29 minutes before
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Special weather statement, Aug 2, 5:31 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 8:46 PM MDTSpecial Weather StatementBYZWheatland29 min
Aug 2, 1:27 PM MDTSpecial Weather StatementBYZSweet Grass33 min
Aug 2, 1:57 PM MDTSpecial Weather StatementBYZStillwater63 min
Aug 2, 2:32 PM MDTSevere Thunderstorm WarningBYZCarbon, Stillwater, Yellowstone28 min
Aug 2, 2:46 PM MDTSpecial Weather StatementBYZCarbon44 min
Aug 2, 2:57 PM MDTSevere Thunderstorm WarningBYZCarbon, Stillwater, Yellowstone48 min
Aug 2, 3:35 PM MDTSpecial Weather StatementBYZCarbon40 min
Aug 2, 3:42 PM MDTSpecial Weather StatementBYZYellowstone48 min
Aug 2, 4:06 PM MDTSpecial Weather StatementBYZBig Horn24 min
Aug 2, 4:28 PM MDTSpecial Weather StatementBYZBig Horn47 min
Aug 2, 5:58 PM MDTSevere Thunderstorm WarningBYZPark50 min
Aug 2, 5:02 PM MDTSpecial Weather StatementBYZSheridan43 min
Aug 2, 5:58 PM MDTSpecial Weather StatementBYZSheridan32 min

Nearby

Special Weather Statements in Montana, 2018Every special weather statement 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.