Alert archive / Wyoming / Flood Watches in 2011
Flood Watch 5, NWS Riverton, WY
NWS Riverton, WY issued this flood watch at May 31, 2011, 12:47 PM MDT for 11 counties in Wyoming. It took effect at Jun 1, 2011, 6:00 PM MDT. It was in force for 38 hr.
The area
The counties it named.
The facts
- Issued
- May 31, 2011, 12:47 PM MDT (18:47 UTC)
- In effect from
- Jun 1, 2011, 6:00 PM MDT
- Expired
- Jun 3, 2011, 7:59 AM MDT
- In force
- 38 hr
- Issued by
- NWS Riverton, WY
- Flood severity
- None
Counties Big Horn County, WY, Fremont County, WY, Hot Springs County, WY, Johnson County, WY, Lincoln County, WY, Natrona County, WY, Park County, WY, Sublette County, WY, Sweetwater County, WY, Teton County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 41 km from the middle of the area, began a volume at 18:51 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, 6.8 hours before the alert went out and 44 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1805 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 May 30, 3:49 PM MDT, 20 hours 58 minutes earlier.
Area forecast discussion, May 30, 3:49 PM MDT, 20 hours 58 minutes before
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</html>Hazardous weather outlook, May 30, 2:59 PM MDT, 21 hours 48 minutes before
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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.