Alert archive / Wyoming / Flood Watches in 2011

Flood Watch 9, NWS Riverton, WY

June 23, 2011Fremont County, Wyoming

NWS Riverton, WY issued this flood watch at Jun 23, 2011, 9:20 AM MDT for Fremont County, Wyoming. It took effect at Jun 24, 2011, 12:00 AM MDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Jun 23, 2011, 9:20 AM MDT (15:20 UTC)
In effect from: Jun 24, 2011, 12:00 AM MDT
Expired: Jun 24, 2011, 9:56 AM MDT
In force: 10 hr
Issued by: NWS Riverton, WY
Flood severity: None

County Fremont County, WY

The nearest sounding before it

Riverton, WY (KRIW), launched 12:00Z, 3.3 hours before the alert went out and 19 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2383 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 62 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 flood watch 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 flood watch went out at Jun 23, 4:14 AM MDT, 5 hours 6 minutes earlier.

Area forecast discussion, Jun 23, 4:14 AM MDT, 5 hours 6 minutes before

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Hazardous weather outlook, Jun 23, 5:00 AM MDT, 4 hours 20 minutes before

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In the hours before

Special weather statement, Jun 23, 3:21 AM MDT, 5 hours 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
321 AM MDT THU JUN 23 2011

WYZ024>026-230945-
SALT RIVER AND WYOMING RANGES WY-UPPER GREEN RIVER BASIN WY-UPPER
GREEN RIVER BASIN FOOTHILLS WY-
321 AM MDT THU JUN 23 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN SUBLETTE COUNTY UNTIL
345 AM MDT...

AT 314 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 12 MILES NORTHWEST OF CALPET...OR 14 MILES
SOUTHWEST OF BIG PINEY...MOVING EAST AT 45 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH FREQUENT DANGEROUS LIGHTNING.

THIS STORM WILL BE NEAR...
U.S. HWY 189 MILE MARKER 100 AND BIG PINEY AROUND 330 AM MDT.
MARBLETON...HWY JCT 189 AND 351...SUBLETTE COUNTY FAIRGROUNDS AND
U.S. HWY 189 MILE MARKER 110 AROUND 335 AM MDT.
STATE HWY 351 MILE MARKER 10 AROUND 345 AM MDT.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

REPORT HAZARDOUS WEATHER TO THE NATIONAL WEATHER SERVICE OFFICE IN
RIVERTON AT 1-800-211-1448.

LAT...LON 4274 10980 4239 10966 4235 11036 4253 11042
TIME...MOT...LOC 0921Z 255DEG 41KT 4246 11026

WOLCOTT

Special weather statement, Jun 23, 3:47 AM MDT, 5 hours 33 minutes before

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Special weather statement, Jun 23, 4:28 AM MDT, 4 hours 52 minutes before

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Special weather statement, Jun 23, 7:23 AM MDT, 1 hour 57 minutes before

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Special weather statement, Jun 23, 7:35 AM MDT, 1 hour 45 minutes before

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Special weather statement, Jun 23, 7:41 AM MDT, 1 hour 39 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
Jun 22, 8:39 PM MDT	Special Weather Statement	RIW	Big Horn	51 min
Jun 22, 9:22 PM MDT	Special Weather Statement	RIW	Big Horn	38 min
Jun 23, 2:37 AM MDT	Special Weather Statement	RIW	Lincoln	38 min
Jun 23, 3:21 AM MDT	Special Weather Statement	RIW	Sublette	24 min
Jun 23, 3:47 AM MDT	Special Weather Statement	RIW	Sublette	28 min
Jun 23, 4:28 AM MDT	Special Weather Statement	RIW	Fremont	47 min
Jun 23, 7:23 AM MDT	Special Weather Statement	RIW		52 min
Jun 23, 7:35 AM MDT	Special Weather Statement	RIW		40 min
Jun 23, 10:34 AM MDT	Special Weather Statement	RIW	Lincoln	26 min
Jun 23, 11:02 AM MDT	Special Weather Statement	RIW	Sublette	43 min
Jun 23, 3:24 PM MDT	River Flood Warning	RIW	Fremont	16 days
Jun 23, 5:05 PM MDT	Severe Thunderstorm Warning	RIW	Big Horn	40 min
Jun 23, 5:51 PM MDT	Special Weather Statement	RIW	Fremont	39 min

Nearby

Flood Watches in Wyoming, 2011 Every flood watch in 2011

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.