Alert archive / Wyoming / Flash Flood Watches in 2015
Flash Flood Watch 4, NWS Riverton, WY
NWS Riverton, WY issued this flash flood watch at Jun 3, 2015, 2:38 AM MDT for 7 counties in Wyoming. It took effect at Jun 3, 2015, 12:00 PM MDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jun 3, 2015, 2:38 AM MDT (08:38 UTC)
- In effect from
- Jun 3, 2015, 12:00 PM MDT
- Expired
- Jun 4, 2015, 12:00 AM MDT
- In force
- 12 hr
- Issued by
- NWS Riverton, WY
- Flood severity
- None
Counties Big Horn County, WY, Fremont County, WY, Hot Springs County, WY, Johnson County, WY, Natrona County, WY, Park County, WY, Washakie County, WY
The radar
The Riverton/Lander radar (KRIW), 93 km from the middle of the area, began a volume at 08:43 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 00:00Z, 8.6 hours before the alert went out and 90 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
- 6 J/kg
- Mixed-layer CIN
- -157 J/kg
- Mixed-layer LCL
- 2737 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
What forecasters said that day
The local office's own words before this flash 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 flash flood watch went out at Jun 2, 10:38 PM MDT, 4 hours earlier.
Area forecast discussion, Jun 2, 10:38 PM MDT, 4 hours before
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</html>Hazardous weather outlook, Jun 2, 4:40 AM MDT, 21 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE RIVERTON WY 440 AM MDT TUE JUN 2 2015 WYZ001>020-022>030-031200- YELLOWSTONE NATIONAL PARK-ABSAROKA MOUNTAINS-CODY FOOTHILLS- NORTH BIG HORN BASIN-SOUTHWEST BIG HORN BASIN- SOUTHEAST BIG HORN BASIN-OWL CREEK AND BRIDGER MOUNTAINS- BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST- NORTHEAST JOHNSON COUNTY-SOUTHEAST JOHNSON COUNTY- TETON AND GROS VENTRE MOUNTAINS-JACKSON HOLE- WIND RIVER MOUNTAINS WEST-WIND RIVER MOUNTAINS EAST- UPPER WIND RIVER BASIN-WIND RIVER BASIN-LANDER FOOTHILLS- GREEN MOUNTAINS AND RATTLESNAKE RANGE- NATRONA COUNTY LOWER ELEVATIONS-CASPER MOUNTAIN-STAR VALLEY- SALT RIVER AND WYOMING RANGES-UPPER GREEN RIVER BASIN FOOTHILLS- UPPER GREEN RIVER BASIN-SOUTH LINCOLN COUNTY- ROCK SPRINGS AND GREEN RIVER-FLAMING GORGE-EAST SWEETWATER COUNTY- 440 AM MDT TUE JUN 2 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING. ...FLOOD WARNING FOR PORTIONS OF THE WIND RIVER THROUGH WEDNESDAY... .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS EXPECTED TODAY. SOME STORMS ACROSS PORTIONS OF JOHNSON COUNTY AND THE EASTERN BIGHORN BASIN MAY BECOME SEVERE WITH DAMAGING WIND. OTHER STORMS ACROSS THE AREA MAY HAVE GUSTY WIND. ALL STORMS WILL HAVE THE POTENTIAL FOR SMALL HAIL AND FREQUENT LIGHTNING ALONG WITH PERIODS OF MODERATE TO HEAVY RAINFALL. MOST ACTIVITY SHOULD WEAKEN THROUGH THE EVENING. RIVERS AND SMALL STREAMS WILL BE RUNNING HIGH WITH A FEW CAUSING SOME MINOR FLOODING. ADDITIONAL HEAVY RAIN COULD RESULT IN ADDITIONAL LOCALIZED FLOODING...ESPECIALLY ALONG SMALL CREEKS IN MOUNTAINS AND ADJACENT FOOTHILLS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY WEDNESDAY THROUGH THURSDAY...AFTERNOON SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE. SOME STORMS MAY BECOME STRONG WITH GUSTY WIND AND HAIL. RIVERS AND CREEKS WILL REMAIN HIGH...WITH A FEW CAUSING SOME MINOR FLOODING. FRIDAY THROUGH MONDAY...ISOLATED TO SCATTERED THUNDERSTORMS EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER TODAY INCLUDING WIND STRONGER THAN 45 MPH...HAIL LARGER THAN PEAS...CREEKS RUNNING AT OR ABOVE BANKFULL...AND ANY SIGNIFICANT RAINFALL WHICH RESULTS IN LOCALIZED FLOODING. THANK YOU.
The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 2, 6:06 PM MDT | Tornado Warning | RIW | Johnson | 24 min |
| Jun 2, 6:28 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 32 min |
| Jun 2, 6:37 PM MDT | Special Weather Statement | RIW | 38 min | |
| Jun 3, 2:07 PM MDT | Special Weather Statement | RIW | 38 min | |
| Jun 3, 2:13 PM MDT | Special Weather Statement | RIW | Johnson | 47 min |
| Jun 3, 3:22 PM MDT | Special Weather Statement | RIW | Hot Springs | 38 min |
| Jun 3, 3:25 PM MDT | Special Weather Statement | RIW | Johnson | 50 min |
| Jun 3, 3:48 PM MDT | Special Weather Statement | RIW | Natrona | 42 min |
| Jun 3, 4:10 PM MDT | Special Weather Statement | RIW | Hot Springs | 50 min |
| Jun 3, 4:14 PM MDT | Areal Flood Advisory | RIW | Johnson | 3 hr |
| Jun 3, 4:28 PM MDT | Special Weather Statement | RIW | Natrona | 47 min |
| Jun 3, 4:32 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn, Hot Springs, Washakie | 43 min |
| Jun 3, 4:40 PM MDT | Special Weather Statement | RIW | Hot Springs | 50 min |
| Jun 3, 4:43 PM MDT | Severe Thunderstorm Warning | RIW | Natrona | 47 min |
| Jun 3, 5:04 PM MDT | Areal Flood Advisory | RIW | Hot Springs | 116 min |
| Jun 3, 5:16 PM MDT | Severe Thunderstorm Warning | RIW | Washakie | 44 min |
| Jun 3, 5:38 PM MDT | Severe Thunderstorm Warning | RIW | Johnson | 52 min |
| Jun 3, 5:41 PM MDT | Special Weather Statement | RIW | Natrona | 49 min |
| Jun 3, 5:46 PM MDT | Special Weather Statement | RIW | 44 min | |
| Jun 3, 5:55 PM MDT | Severe Thunderstorm Warning | RIW | Johnson, Natrona | 26 min |
Nearby
Flash Flood Watches in Wyoming, 2015Every flash flood watch in 2015
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.