Alert archive / Montana / Flash Flood Warnings in 2010

Flash Flood Warning 9, NWS Billings, MT

June 20, 2010Carter County, Montana

NWS Billings, MT issued this flash flood warning at Jun 20, 2010, 7:55 PM MDT for Carter County, Montana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 20, 2010, 7:55 PM MDT (01:55 UTC)
Expired: Jun 20, 2010, 10:45 PM MDT
In force: 3 hr
Issued by: NWS Billings, MT
Area: Storm-based polygon
Flood severity: None

County Carter County, MT

The radar

The Rapid City radar (KUDX), 205 km from the middle of the area, began a volume at 01:55 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, 1.9 hours before the alert went out and 327 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1174 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 1617 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 2 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -2.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jun 20, 6:23 PM MDT, 1 hour 32 minutes earlier.

Area forecast discussion, Jun 20, 6:23 PM MDT, 1 hour 32 minutes before

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Hazardous weather outlook, Jun 20, 1:07 PM MDT, 6 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
107 PM MDT SUN JUN 20 2010

MTZ028>042-056>058-063>068-WYZ098-099-211915-
SOUTHERN WHEATLAND-MUSSELSHELL-TREASURE-NORTHERN ROSEBUD-CUSTER-
FALLON-NORTHERN STILLWATER-YELLOWSTONE-POWDER RIVER-CARTER-
SOUTHERN BIG HORN-EASTERN CARBON-NORTHERN PARK-
NORTHERN SWEET GRASS-GOLDEN VALLEY-RED LODGE FOOTHILLS-
NORTHERN BIG HORN-SOUTHERN ROSEBUD-JUDITH GAP-PARADISE VALLEY-
LIVINGSTON AREA-BEARTOOTH FOOTHILLS-ABSAROKA/BEARTOOTH MOUNTAINS-
CRAZY MOUNTAINS-NORTHEAST BIG HORN MOUNTAINS-SHERIDAN FOOTHILLS-
107 PM MDT SUN JUN 20 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH
CENTRAL WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS WILL IMPACT THE FORECAST AREA THIS
AFTERNOON THROUGH TONIGHT. SOME OF THESE STORMS MAY BECOME
SEVERE...ESPECIALLY FROM ROUNDUP TO BILLINGS TO RED LODGE AND
EAST. THE PRIMARY THREATS WILL BE LARGE HAIL...STRONG
WINDS...HEAVY RAIN AND FREQUENT LIGHTNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

A COLD FRONT WILL PUSH THROUGH THE FORECAST AREA MONDAY AFTERNOON
THROUGH MONDAY EVENING. THUNDERSTORMS ARE EXPECTED TO DEVELOP
ALONG THE FRONT. SOME OF THESE STORMS MAY BECOME SEVERE
ESPECIALLY OVER EXTREME SOUTHEASTERN MONTANA.

MONITOR NOAA WEATHER RADIO FOR THE LATEST
INFORMATION...FORECASTS...AND WARNINGS.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Local storm report, Jun 20, 2:58 PM MDT, 4 hours 57 minutes before

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Local storm report, Jun 20, 3:54 PM MDT, 4 hours 1 minute before

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Local storm report, Jun 20, 4:33 PM MDT, 3 hours 22 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 6:00 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	60 min
Jun 20, 6:08 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	67 min
Jun 20, 6:12 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	63 min
Jun 20, 6:52 PM MDT	Flash Flood Warning	BYZ	Yellowstone	3 hr
Jun 20, 7:09 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Fallon	51 min
Jun 20, 7:09 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud, Treasure	49 min
Jun 20, 7:21 PM MDT	Tornado Warning	BYZ	Big Horn, Rosebud	24 min
Jun 20, 9:05 PM MDT	Flash Flood Warning	BYZ	Carter	5 hr
Jun 20, 9:05 PM MDT	Special Weather Statement	BYZ	Rosebud	55 min
Jun 21, 4:07 AM MDT	Flash Flood Watch	BYZ	Big Horn, Carter, Custer, Fallon, Musselshell, Powder River and 3 more	19 hr
Jun 21, 11:58 AM MDT	Areal Flood Advisory	BYZ	Wheatland	22 hr
Jun 21, 4:55 PM MDT	Special Weather Statement	BYZ	Big Horn	65 min
Jun 21, 5:06 PM MDT	Special Weather Statement	BYZ	Big Horn	54 min
Jun 21, 5:24 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	66 min
Jun 21, 5:49 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River, Rosebud	56 min
Jun 21, 5:51 PM MDT	Special Weather Statement	BYZ	Yellowstone	54 min
Jun 21, 5:54 PM MDT	Tornado Warning	BYZ	Big Horn, Rosebud	36 min
Jun 21, 5:59 PM MDT	Tornado Warning	BYZ	Powder River, Rosebud	31 min
Jun 20, 6:28 PM MDT	Severe Thunderstorm Warning	BYZ	Sheridan	49 min

Nearby

Flash Flood Warnings in Montana, 2010 Every flash flood warning in 2010

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.