Alert archive / Wyoming / Special Weather Statements in 2016

Special Weather Statement, NWS Riverton, WY

May 25, 2016Big Horn County, Wyoming

NWS Riverton, WY issued this special weather statement at May 25, 2016, 5:21 PM MDT for Big Horn County, Wyoming. It was in force for 24 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: May 25, 2016, 5:21 PM MDT (23:21 UTC)
Expired: May 25, 2016, 5:45 PM MDT
In force: 24 min
Issued by: NWS Riverton, WY

County Big Horn County, WY

The radar

The Riverton/Lander radar (KRIW), 144 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 143 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: 39 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1143 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 8 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 Riverton, WY wrote its last area forecast discussion before this special weather statement went out at May 25, 2:22 PM MDT, 2 hours 59 minutes earlier.

Area forecast discussion, May 25, 2:22 PM MDT, 2 hours 59 minutes before

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Hazardous weather outlook, May 25, 3:13 AM MDT, 14 hours 8 minutes before

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In the hours before

Special weather statement, May 25, 3:36 PM MDT, 1 hour 45 minutes before

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Special weather statement, May 25, 4:11 PM MDT, 1 hour 10 minutes before

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Special weather statement, May 25, 4:37 PM MDT, 44 minutes before

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Special weather statement, May 25, 4:41 PM MDT, 40 minutes before

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Special weather statement, May 25, 5:17 PM MDT, 4 minutes before

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Special weather statement, May 25, 5:21 PM MDT, 0 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
May 24, 6:10 PM MDT	Special Weather Statement	RIW		50 min
May 24, 6:21 PM MDT	Special Weather Statement	RIW	Johnson	39 min
May 24, 6:40 PM MDT	Special Weather Statement	RIW	Johnson	50 min
May 24, 6:47 PM MDT	Special Weather Statement	RIW	Big Horn	43 min
May 24, 6:49 PM MDT	Special Weather Statement	RIW	Johnson	41 min
May 24, 6:53 PM MDT	Special Weather Statement	RIW	Washakie	37 min
May 24, 6:58 PM MDT	Special Weather Statement	RIW	Johnson	47 min
May 24, 7:35 PM MDT	Special Weather Statement	RIW	Big Horn	25 min
May 24, 7:40 PM MDT	Special Weather Statement	RIW	Johnson	50 min
May 24, 7:50 PM MDT	Special Weather Statement	RIW	Johnson	25 min
May 24, 7:57 PM MDT	Severe Thunderstorm Warning	RIW	Johnson	33 min
May 24, 8:34 PM MDT	Special Weather Statement	RIW	Natrona	26 min
May 25, 11:17 AM MDT	Special Weather Statement	RIW	Fremont	43 min
May 25, 11:32 AM MDT	Special Weather Statement	RIW	Natrona	43 min
May 25, 11:52 AM MDT	Special Weather Statement	RIW	Hot Springs	38 min
May 25, 12:03 PM MDT	Special Weather Statement	RIW	Big Horn	42 min
May 25, 12:43 PM MDT	Special Weather Statement	RIW	Washakie	32 min
May 25, 12:56 PM MDT	Special Weather Statement	RIW	Sweetwater	34 min
May 25, 1:16 PM MDT	Special Weather Statement	RIW	Washakie	29 min
May 25, 1:36 PM MDT	Special Weather Statement	RIW	Big Horn	39 min
May 25, 1:46 PM MDT	Special Weather Statement	RIW	Fremont	59 min
May 25, 1:48 PM MDT	Special Weather Statement	RIW	Washakie	42 min
May 25, 1:52 PM MDT	Special Weather Statement	RIW	Big Horn	38 min
May 25, 1:53 PM MDT	Special Weather Statement	RIW	Hot Springs	52 min
May 25, 2:14 PM MDT	Special Weather Statement	RIW		46 min
May 25, 2:27 PM MDT	Special Weather Statement	RIW	Fremont	48 min
May 25, 2:31 PM MDT	Special Weather Statement	RIW	Fremont	44 min
May 25, 2:34 PM MDT	Special Weather Statement	RIW	Washakie	41 min
May 25, 2:52 PM MDT	Special Weather Statement	RIW	Washakie	38 min
May 25, 3:15 PM MDT	Special Weather Statement	RIW		30 min
May 25, 3:36 PM MDT	Special Weather Statement	RIW	Natrona	39 min
May 25, 4:11 PM MDT	Special Weather Statement	RIW	Johnson	49 min
May 25, 4:37 PM MDT	Special Weather Statement	RIW	Big Horn	38 min
May 25, 4:41 PM MDT	Special Weather Statement	RIW	Big Horn	49 min
May 25, 5:17 PM MDT	Special Weather Statement	RIW	Hot Springs	28 min

Nearby

Special Weather Statements in Wyoming, 2016 Every special weather statement in 2016

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.