Alert archive / Wyoming / Flash Flood Watches in 2015

Flash Flood Watch 2, NWS Riverton, WY

May 26, 20157 counties in Wyoming

NWS Riverton, WY issued this flash flood watch at May 26, 2015, 1:06 PM MDT for 7 counties in Wyoming. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
May 26, 2015, 1:06 PM MDT (19:06 UTC)
Expired
May 26, 2015, 9:45 PM MDT
In force
9 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, Sweetwater County, WY, Washakie County, WY

The radar

The Riverton/Lander radar (KRIW), 63 km from the middle of the area, began a volume at 19:08 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.

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 May 26, 2:47 AM MDT, 10 hours 19 minutes earlier.

Area forecast discussion, May 26, 2:47 AM MDT, 10 hours 19 minutes before
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Hazardous weather outlook, May 26, 5:00 AM MDT, 8 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT TUE MAY 26 2015

WYZ001>020-022>030-271200-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
500 AM MDT TUE MAY 26 2015

...FLOOD WARNING FOR THE POWDER RIVER IN EASTERN JOHNSON COUNTY AND
A FLOOD ADVISORY FOR THE BIGHORN RIVER IN WASHAKIE COUNTY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

FLOOD WARNING FOR THE POWDER RIVER ACROSS JOHNSON COUNTY AND A
FLOOD ADVISORY FOR THE THE BIGHORN RIVER IN WASHAKIE COUNTY TODAY.
PLEASE SEE FLOOD WARNINGS AND STATEMENTS FOR MORE INFORMATION.
OTHERWISE...ISOLATED TO SCATTERED THUNDERSTORMS THIS AFTERNOON AND
EVENING. A FEW STRONGER STORMS WITH SMALL HAIL POSSIBLE ACROSS
EASTERN AND SOUTHERN FREMONT COUNTY...EAST INTO NATRONA COUNTY.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

WEDNESDAY THROUGH FRIDAY...ISOLATED TO SCATTERED THUNDERSTORMS
EACH AFTERNOON AND EVENING. STRONGER STORMS WILL PRODUCE LOCALLY
HEAVY RAIN AND HAIL.

SATURDAY AND SUNDAY...ISOLATED MAINLY MOUNTAIN THUNDERSTORMS EACH
AFTERNOON AND EARLY EVENING.

MONDAY...A FEW STRONGER THUNDERSTORMS POSSIBLE IN THE NORTHWEST.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE URGED TO REPORT...HAIL OVER A HALF AN INCH IN DIAMETER
AND RAINFALL OVER ONE HALF INCH. THANK YOU.

TEAM RIVERTON

In the hours before

Special weather statement, May 26, 12:35 PM MDT, 31 minutes before
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Special weather statement, May 26, 12:45 PM MDT, 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1245 PM MDT TUE MAY 26 2015

WYZ005>009-011-020-261930-
BIGHORN MOUNTAINS SOUTHEAST WY-BIGHORN MOUNTAINS WEST WY-NATRONA
COUNTY LOWER ELEVATIONS WY-OWL CREEK AND BRIDGER MOUNTAINS
WY-SOUTHEAST BIG HORN BASIN WY-SOUTHEAST JOHNSON COUNTY WY-SOUTHWEST
BIG HORN BASIN WY-
1245 PM MDT TUE MAY 26 2015

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JOHNSON...
SOUTHEASTERN WASHAKIE...SOUTHEASTERN HOT SPRINGS...NORTHWESTERN
NATRONA AND EXTREME NORTHEASTERN FREMONT COUNTIES UNTIL 130 PM MDT...

AT 1242 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
THUNDERSTORMS ALONG A LINE EXTENDING FROM 14 MILES SOUTHEAST OF
STATE HWY 172 MILE MARKER 10 TO 5 MILES NORTHEAST OF RED WALL...AND
MOVING NORTHEAST AT 10 MPH.

HAIL UP TO THE SIZE OF PENNIES AND PERIODS OF HEAVY RAIN CAN BE
EXPECTED WITH THESE STORMS. IN ADDITION...EXPECT RISING CREEKS AND
DRY WASHES OVER THE NEXT SEVERAL HOURS.

THESE STORMS WILL BE NEAR...
HOLE IN THE WALL AROUND 130 PM MDT.

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

BRIEF HEAVY RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES
AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A
FLOODED ROADWAY.

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

LAT...LON 4365 10787 4368 10744 4354 10678 4342 10682
      4353 10797
TIME...MOT...LOC 1843Z 247DEG 7KT 4355 10786 4346 10683

ALLEN
Special weather statement, May 26, 12:53 PM MDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 8:41 PM MDTAreal Flood AdvisoryRIWWashakie23 hr
May 26, 12:35 PM MDTSpecial Weather StatementRIWNatrona55 min
May 26, 12:45 PM MDTSpecial Weather StatementRIWWashakie45 min
May 26, 12:53 PM MDTSpecial Weather StatementRIWHot Springs37 min
May 26, 1:12 PM MDTFlash Flood WarningRIWJohnson6 hr
May 26, 2:39 PM MDTSpecial Weather StatementRIWHot Springs36 min
May 26, 4:35 PM MDTAreal Flood AdvisoryRIWSweetwater3 hr
May 26, 5:28 PM MDTSpecial Weather StatementRIWFremont47 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; radar from the NEXRAD Level II archive.