Alert archive / Wyoming / Flash Flood Warnings in 2015

Flash Flood Warning 13, NWS Riverton, WY

June 3, 2015Johnson County, Natrona County, Wyoming

NWS Riverton, WY issued this flash flood warning at Jun 3, 2015, 10:53 PM MDT for Johnson County, Natrona County, Wyoming. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 3, 2015, 10:53 PM MDT (04:53 UTC)
Expired
Jun 4, 2015, 3:45 AM MDT
In force
5 hr
Issued by
NWS Riverton, WY
Area
Storm-based polygon
Flood severity
None

Counties Johnson County, WY, Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 189 km from the middle of the area, began a volume at 04:56 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, 4.9 hours before the alert went out and 183 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-pSkew-T log-p diagram, Riverton, WY at 00:00Z on 2015-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 141 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2015-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
141 J/kg
Mixed-layer CIN
-106 J/kg
Mixed-layer LCL
2471 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

110 
WGUS55 KRIW 040453
FFWRIW
WYC019-025-040945-
/O.NEW.KRIW.FF.W.0013.150604T0453Z-150604T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
1053 PM MDT WED JUN 3 2015

THE NATIONAL WEATHER SERVICE IN RIW/RIVERTON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN NATRONA COUNTY IN CENTRAL WYOMING...
  SOUTHEASTERN JOHNSON COUNTY IN NORTH CENTRAL WYOMING...

* UNTIL 345 AM MDT
    
* AT 1052 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS NORTHEAST NATRONA AND SOUTHEAST JOHNSON 
  COUNTIES. ONE TO TWO INCHES OF RAIN HAS ALREADY FALLEN. FLASH 
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MIDWEST...EDGERTON...LINCH...ANTELOPE HILLS...TEAPOT ROCK...FORT
  RENO HISTORICAL SITE...SUSSEX...NATRONA...SALT CREEK COUNTRY CLUB
  AND MIDWEST SCHOOL.

# 

THIS INCLUDES INTERSTATE 25 BETWEEN MILE MARKERS 201 AND 245.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4349 10607 4303 10609 4303 10691 4399 10634
      4401 10601 4350 10602

$$

MURRELL
4 follow-up statements
697 
WGUS75 KRIW 040519
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1119 PM MDT WED JUN 3 2015

WYC019-025-040945-
/O.CON.KRIW.FF.W.0013.000000T0000Z-150604T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-JOHNSON-
1119 PM MDT WED JUN 3 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM MDT FOR
NORTHEASTERN NATRONA AND SOUTHEASTERN JOHNSON COUNTIES...

AT 1108 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN ACROSS EXTREME SOUTHEAST JOHNSON...AND NORTHEAST NATRONA 
COUNTIES. WEATHER SPOTTERS IN MIDWEST REPORTED BETWEEN 1 AND 1.5 
INCHES OF RAIN FELL IN ONLY ABOUT 30 TO 45 MINUTES. DOPPLER RADAR 
ALSO INDICATED AREAS OF 2 TO 3 INCHES OF RAIN HAS FALLEN IN EXTREME 
SOUTHEAST JOHNSON NEAR SUSSEX.

AREAS OF GREATEST CONCERN FOR FLOODING IS AROUND SUSSEX...MIDWEST 
AND EDGERTON AREAS...AS WELL AS ALONG THE MEADOW CREEK...SALT CREEK 
AND DUGOUT CREEK DRAINAGES. 

ADDITIONAL RAINFALL AMOUNTS OF A HALF AN INCH COULD OCCUR.

THIS INCLUDES INTERSTATE 25 BETWEEN MILE MARKERS 201 AND 245.

THIS FLASH FLOOD WARNING REPLACED THE FLOOD ADVISORY THAT WAS IN 
EFFECT UNTIL 130 AM FOR THE SAME AREA.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4349 10607 4303 10609 4303 10691 4399 10634
      4401 10601 4350 10602

$$

MURRELL
124 
WGUS75 KRIW 040604
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1204 AM MDT THU JUN 4 2015

WYC019-025-040945-
/O.CON.KRIW.FF.W.0013.000000T0000Z-150604T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-JOHNSON-
1204 AM MDT THU JUN 4 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM MDT FOR
NORTHEASTERN NATRONA AND SOUTHEASTERN JOHNSON COUNTIES...

AT 1145 PM MDT...PUBLIC REPORTED BETWEEN 1 AND 1.5 INCHES OF RAIN 
FELL IN THE MIDWEST AND EDGERTON AREAS BETWEEN 1015 PM AND 1115 
PM...WITH THE BULK OF THE RAINFALL OCCURRING IN ABOUT 20 MINUTES. 
DOPPLER RADAR ESTIMATES THAT UP TO 3 INCHES OF RAIN COULD HAVE 
FALLEN IN ISOLATED AREAS ACROSS EXTREME SOUTHEAST JOHNSON AND 
EXTREME NORTHEAST NATRONA COUNTIES. 

THE HEAVY RAINFALL HAS SHIFTED EAST INTO CAMPBELL AND CONVERSE 
COUNTIES...WITH ADDITIONAL RAINFALL OF ONLY LESS THAN THAN A TENTH 
OF A INCH. HOWEVER...SMALL STREAMS WILL CONTINUE TO RISE QUICKLY 
OVER THE NEXT COUPLE OF HOURS...AND FLASH FLOODING REMAINS LIKELY 
ESPECIALLY IN LOW AREAS OR NORMALLY DRY WASHES.

AREAS OF GREATEST CONCERN FOR FLOODING IS AROUND SUSSEX...MIDWEST 
AND EDGERTON AREAS...AS WELL AS ALONG BOTHWELL DRAW...CASTLE 
CREEK...MEADOW CREEK...SALT CREEK AND DUGOUT CREEK DRAINAGES. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4349 10607 4303 10609 4304 10639 4338 10649
      4356 10651 4399 10634 4401 10601 4350 10602

$$

MURRELL
097 
WGUS75 KRIW 040840
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
240 AM MDT THU JUN 4 2015

WYC019-025-040945-
/O.CON.KRIW.FF.W.0013.000000T0000Z-150604T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-JOHNSON-
240 AM MDT THU JUN 4 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM MDT FOR
NORTHEASTERN NATRONA AND SOUTHEASTERN JOHNSON COUNTIES...

AT 230 AM MDT...DOPPLER RADAR INDICATED THE RAIN HAS ENDED OVER 
SOUTHEAST JOHNSON AND NORTHEAST NATRONA COUNTIES.  HOWEVER SMALL 
STREAMS WILL CONTINUE TO RUN HIGH WITH THE POSSIBLITY OF CONTINUED 
RISES AND FLOODING IN A FEW LOCATIONS. AREAS OF GREATEST CONCERN 

AREAS OF GREATEST CONCERN FOR FLOODING IS ALONG THE BOTHWELL 
DRAW...CASTLE CREEK...MEADOW CREEK...SALT CREEK AND DUGOUT CREEK 
DRAINAGES. 

THE POWDER RIVER AT SUSSEX ROSE 4 FEET SINCE 9 PM...AND AT 2 AM WAS 
AT 7 FEET. FLOOD STAGE AT THIS LOCATION IS 11 FEET.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4329 10608 4322 10633 4337 10635 4345 10633
      4359 10646 4399 10634 4401 10601 4350 10602
      4349 10607

$$

MURRELL
591 
WGUS75 KRIW 040938
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
338 AM MDT THU JUN 4 2015

WYC019-025-040947-
/O.EXP.KRIW.FF.W.0013.000000T0000Z-150604T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-JOHNSON-
338 AM MDT THU JUN 4 2015

...THE FLASH FLOOD WARNING FOR NORTHEASTERN NATRONA AND SOUTHEASTERN
JOHNSON COUNTIES WILL EXPIRE AT 345 AM MDT...

FLOOD WATERS ACROSS NORTHEAST NATRONA AND SOUTHEAST JOHNSON COUNTIES 
ARE RECEDING...AND ARE NO LONGER EXPECTED TO POSE A THREAT TO LIFE 
OR PROPERTY. 

LAT...LON 4329 10608 4322 10633 4337 10635 4345 10633
      4359 10646 4399 10634 4401 10601 4350 10602
      4349 10607

$$

MURRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 3, 6:06 PM MDTSpecial Weather StatementRIWFremont39 min
Jun 3, 6:20 PM MDTFlash Flood WarningRIWWashakie3 hr
Jun 3, 6:26 PM MDTSpecial Weather StatementRIWJohnson49 min
Jun 3, 6:29 PM MDTSevere Thunderstorm WarningRIWJohnson46 min
Jun 3, 6:33 PM MDTSpecial Weather StatementRIWFremont42 min
Jun 3, 6:34 PM MDTSpecial Weather StatementRIWWashakie41 min
Jun 3, 6:37 PM MDTSpecial Weather StatementRIWHot Springs38 min
Jun 3, 6:41 PM MDTSevere Thunderstorm WarningRIWJohnson49 min
Jun 3, 6:49 PM MDTSevere Thunderstorm WarningRIWFremont, Hot Springs41 min
Jun 3, 7:10 PM MDTFlash Flood WarningRIWJohnson3 hr
Jun 3, 7:12 PM MDTSevere Thunderstorm WarningRIWJohnson63 min
Jun 3, 7:15 PM MDTSpecial Weather StatementRIWWashakie45 min
Jun 3, 7:41 PM MDTFlash Flood WarningRIWJohnson3 hr
Jun 3, 7:45 PM MDTSpecial Weather StatementRIWJohnson45 min
Jun 3, 7:49 PM MDTSpecial Weather StatementRIWFremont41 min
Jun 3, 7:54 PM MDTSpecial Weather StatementRIW51 min
Jun 3, 8:05 PM MDTSpecial Weather StatementRIWJohnson40 min
Jun 3, 8:15 PM MDTSpecial Weather StatementRIW45 min
Jun 3, 8:17 PM MDTSpecial Weather StatementRIWWashakie43 min
Jun 3, 8:45 PM MDTSpecial Weather StatementRIW45 min
Jun 3, 9:00 PM MDTSpecial Weather StatementRIWNatrona45 min
Jun 3, 9:18 PM MDTSpecial Weather StatementRIWFremont42 min
Jun 3, 9:51 PM MDTSpecial Weather StatementRIW39 min
Jun 3, 10:20 PM MDTSevere Thunderstorm WarningRIWJohnson, Natrona40 min
Jun 3, 10:22 PM MDTAreal Flood WarningRIWJohnson12 hr
Jun 3, 10:34 PM MDTAreal Flood AdvisoryRIWJohnson, Natrona3 hr
Jun 3, 11:00 PM MDTSpecial Weather StatementRIWNatrona45 min
Jun 3, 11:05 PM MDTSpecial Weather StatementRIW40 min
Jun 4, 2:47 AM MDTFlash Flood WatchRIWBig Horn, Fremont, Johnson, Natrona, Washakie21 hr
Jun 4, 10:53 AM MDTAreal Flood WarningRIWJohnson24 hr
Jun 4, 12:34 PM MDTFlash Flood WatchRIWBig Horn, Fremont, Hot Springs, Johnson, Natrona, Park and 1 more35 hr
Jun 4, 3:19 PM MDTSpecial Weather StatementRIW41 min
Jun 4, 3:51 PM MDTSpecial Weather StatementRIWHot Springs39 min
Jun 4, 4:31 PM MDTSpecial Weather StatementRIWHot Springs29 min
Jun 4, 5:01 PM MDTSpecial Weather StatementRIWHot Springs29 min

Nearby

Flash Flood Warnings in Wyoming, 2015Every flash flood warning 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.