Alert archive / Wyoming / Flash Flood Warnings in 2013

Flash Flood Warning 15, NWS Riverton, WY

September 17, 2013Lincoln County, Sublette County, Wyoming

NWS Riverton, WY issued this flash flood warning at Sep 17, 2013, 6:09 PM MDT for Lincoln County, Sublette County, Wyoming. It was in force for 6 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: Sep 17, 2013, 6:09 PM MDT (00:09 UTC)
Expired: Sep 18, 2013, 12:00 AM MDT
In force: 6 hr
Issued by: NWS Riverton, WY
Area: Storm-based polygon
Flood severity: None

Counties Lincoln County, WY, Sublette County, WY

The radar

The Riverton/Lander radar (KRIW), 160 km from the middle of the area, began a volume at 00:09 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

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.2 hours before the alert went out and 235 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: 230 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 3419 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Riverton, WY wrote its last area forecast discussion before this flash flood warning went out at Sep 17, 2:21 PM MDT, 3 hours 48 minutes earlier.

Area forecast discussion, Sep 17, 2:21 PM MDT, 3 hours 48 minutes before

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Hazardous weather outlook, Sep 17, 1:38 PM MDT, 4 hours 31 minutes before

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In the hours before

Special weather statement, Sep 17, 5:31 PM MDT, 38 minutes before

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Special weather statement, Sep 17, 5:33 PM MDT, 36 minutes before

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Special weather statement, Sep 17, 5:41 PM MDT, 28 minutes before

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Special weather statement, Sep 17, 5:50 PM MDT, 19 minutes before

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Special weather statement, Sep 17, 5:55 PM MDT, 14 minutes before

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Special weather statement, Sep 17, 5:58 PM MDT, 11 minutes before

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The office that day

Everything else NWS Riverton, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 17, 6:01 PM MDT	Special Weather Statement	RIW	Teton	89 min
Sep 17, 6:13 PM MDT	Special Weather Statement	RIW	Sublette	62 min
Sep 17, 6:15 PM MDT	Special Weather Statement	RIW	Sublette	60 min
Sep 17, 6:29 PM MDT	Special Weather Statement	RIW		61 min
Sep 17, 6:50 PM MDT	Special Weather Statement	RIW	Johnson	40 min
Sep 17, 7:07 PM MDT	Special Weather Statement	RIW		53 min
Sep 17, 7:20 PM MDT	Special Weather Statement	RIW	Sublette	40 min
Sep 17, 7:49 PM MDT	Special Weather Statement	RIW	Washakie	41 min
Sep 17, 8:01 PM MDT	Special Weather Statement	RIW		44 min
Sep 17, 8:27 PM MDT	Special Weather Statement	RIW	Sublette	48 min
Sep 17, 8:34 PM MDT	Special Weather Statement	RIW	Sweetwater	41 min
Sep 17, 8:44 PM MDT	Special Weather Statement	RIW	Fremont	31 min
Sep 17, 8:54 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	66 min
Sep 17, 9:12 PM MDT	Special Weather Statement	RIW	Sublette	48 min
Sep 17, 9:35 PM MDT	Special Weather Statement	RIW	Sweetwater	55 min
Sep 17, 9:53 PM MDT	Severe Thunderstorm Warning	RIW	Fremont	67 min
Sep 17, 10:02 PM MDT	Special Weather Statement	RIW	Fremont	43 min
Sep 17, 10:22 PM MDT	Special Weather Statement	RIW		38 min
Sep 17, 10:37 PM MDT	Special Weather Statement	RIW	Fremont	38 min
Sep 17, 10:42 PM MDT	Special Weather Statement	RIW	Washakie	48 min
Sep 17, 11:15 PM MDT	Special Weather Statement	RIW		45 min
Sep 17, 11:24 PM MDT	Special Weather Statement	RIW		51 min
Sep 17, 11:32 PM MDT	Special Weather Statement	RIW	Washakie	43 min
Sep 17, 11:50 PM MDT	Special Weather Statement	RIW		40 min
Sep 18, 5:56 AM MDT	Freeze Watch	RIW	Fremont, Lincoln, Sublette, Sweetwater, Teton	8 hr
Sep 18, 10:34 AM MDT	Special Weather Statement	RIW	Hot Springs	41 min
Sep 18, 11:08 AM MDT	Special Weather Statement	RIW	Washakie	52 min
Sep 18, 12:57 PM MDT	Special Weather Statement	RIW	Johnson	48 min
Sep 18, 1:29 PM MDT	Freeze Warning	RIW	Fremont, Lincoln, Sublette, Sweetwater, Teton	20 hr
Sep 18, 1:46 PM MDT	Special Weather Statement	RIW	Teton	44 min
Sep 18, 4:48 PM MDT	Special Weather Statement	RIW	Big Horn	42 min

Nearby

Flash Flood Warnings in Wyoming, 2013 Every flash flood warning in 2013

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.