Alert archive / Montana / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 2, NWS Billings, MT

May 3, 2020Carter County, Montana

NWS Billings, MT issued this severe thunderstorm warning at May 3, 2020, 5:26 PM MDT for Carter County, Montana. It was in force for 64 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
May 3, 2020, 5:26 PM MDT (23:26 UTC)
Expired
May 3, 2020, 6:30 PM MDT
In force
64 min
Issued by
NWS Billings, MT
Area
Storm-based polygon
Hail
1.75 in
Wind
60.0 mph

County Carter County, MT

The radar

The Rapid City radar (KUDX), 205 km from the middle of the area, began a volume at 23:26 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

Rapid City, SD (KUNR), launched 12:00Z, 11.4 hours before the alert went out and 207 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, Rapid City, SD at 12:00Z on 2020-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Rapid City, SD at 12:00Z on 2020-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1584 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-31 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 severe thunderstorm warning 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 severe thunderstorm warning went out at May 3, 1:22 PM MDT, 4 hours 4 minutes earlier.

Area forecast discussion, May 3, 1:22 PM MDT, 4 hours 4 minutes before
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Hazardous weather outlook, May 3, 9:20 AM MDT, 8 hours 6 minutes before
Hazardous Weather Outlook
National Weather Service Billings MT
920 AM MDT Sun May 3 2020

MTZ029>033-036-037-057-058-173-041530-
Musselshell-Treasure-Northern Rosebud-Custer-Fallon-Powder River-
Carter-Northern Big Horn-Southern Rosebud-Northeastern Yellowstone-
920 AM MDT Sun May 3 2020

This Hazardous Weather Outlook is for portions of central
Montana...south central Montana and southeast Montana.

* WHAT...Potential for a few strong to severe thunderstorms.

* WHERE...Along and east of a Roundup to Hardin line.

* WHEN...This afternoon through early evening.

* ADDITIONAL DETAILS...Hail up to 1 inch diameter and strong wind
  gusts are possible with the strongest storms. Please stay aware
  if you have plans to be outdoors.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Weather Outlook is issued when hazardous weather could
impact the region within the next week. Be sure to stay tuned for
future updates as locations, timing, and impacts could change.
Begin preparations to mitigate any impacts that could result from
the hazardous weather.

&&

In the hours before

Local storm report, May 3, 3:50 PM MDT, 1 hour 36 minutes before
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Special weather statement, May 3, 4:01 PM MDT, 1 hour 25 minutes before
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Special weather statement, May 3, 4:03 PM MDT, 1 hour 23 minutes before
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Special weather statement, May 3, 4:26 PM MDT, 1 hour before
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Special weather statement, May 3, 5:19 PM MDT, 7 minutes before
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Local storm report, May 3, 5:25 PM MDT, 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 2, 8:34 PM MDTSpecial Weather StatementBYZBig Horn26 min
May 2, 9:09 PM MDTSpecial Weather StatementBYZBig Horn36 min
May 2, 9:43 PM MDTSpecial Weather StatementBYZBig Horn47 min
May 3, 12:09 PM MDTSpecial Weather StatementBYZSweet Grass, Wheatland51 min
May 3, 1:00 PM MDTSpecial Weather StatementBYZGolden Valley, Sweet Grass45 min
May 3, 2:12 PM MDTSpecial Weather StatementBYZMusselshell63 min
May 3, 2:26 PM MDTSpecial Weather StatementBYZCuster49 min
May 3, 3:04 PM MDTSpecial Weather StatementBYZYellowstone56 min
May 3, 3:36 PM MDTSpecial Weather StatementBYZCarter24 min
May 3, 3:38 PM MDTSpecial Weather StatementBYZTreasure82 min
May 3, 4:01 PM MDTSpecial Weather StatementBYZCarter29 min
May 3, 4:03 PM MDTSpecial Weather StatementBYZTreasure42 min
May 3, 4:26 PM MDTSpecial Weather StatementBYZCarter34 min
May 3, 4:32 PM MDTSevere Thunderstorm WarningBYZCarter58 min
May 3, 5:19 PM MDTSpecial Weather StatementBYZCuster71 min

Nearby

Severe Thunderstorm Warnings in Montana, 2020Every severe thunderstorm warning in 2020

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.