Alert archive / Wyoming / Flash Flood Warnings in 2016
Flash Flood Warning 2, NWS Riverton, WY
NWS Riverton, WY issued this flash flood warning at May 8, 2016, 5:24 PM MDT for Natrona County, Wyoming. It was in force for 6 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
- May 8, 2016, 5:24 PM MDT (23:24 UTC)
- Expired
- May 8, 2016, 11:15 PM MDT
- In force
- 6 hr
- Issued by
- NWS Riverton, WY
- Area
- Storm-based polygon
- Flood severity
- None
County Natrona County, WY
The radar
The Riverton/Lander radar (KRIW), 189 km from the middle of the area, began a volume at 23:26 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, 11.4 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
537
WGUS55 KRIW 082324
FFWRIW
WYC025-090515-
/O.NEW.KRIW.FF.W.0002.160508T2324Z-160509T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RIVERTON WY
524 PM MDT SUN MAY 8 2016
THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL NATRONA COUNTY IN CENTRAL WYOMING...
* UNTIL 1115 PM MDT
* AT 519 PM MDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING ACROSS
INTERSTATE 25 AT MILE POST 186...AND IN THE ELKHORN CREEK DRAINAGE
WHICH FLOODED FRIDAY NIGHT. AN ADDITIONAL HALF AN INCH TO AN INCH
OF RAIN...WITH ISOLATED HIGHER AMOUNTS COULD OCCUR THIS EVENING.
THIS INCLUDES INTERSTATE 25 BETWEEN MILE MARKERS 176 AND 197.
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 4269 10608 4270 10650 4299 10649 4298 10607
4283 10607 4275 10608 4272 10607
$$
213 follow-up statements
233
WGUS75 KRIW 082345
FFSRIW
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
545 PM MDT SUN MAY 8 2016
WYC025-090515-
/O.CON.KRIW.FF.W.0002.000000T0000Z-160509T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-
545 PM MDT SUN MAY 8 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT FOR
EAST CENTRAL NATRONA COUNTY...
AT 535 PM MDT...EMERGENCY MANAGEMENT REPORTED ONGOING STREET
FLOODING ON THE EAST AND SOUTHEAST SIDE OF CASPER...ESPECIALLY IN
THE ELKHORN CREEK DRAINAGE. THIS WATER FEEDS NORTH TOWARD THE CASPER
COUNTRY CLUB AND THE EAST SIDE OF CASPER ALONG EAST 2ND STREET.
SMALL STREAMS AND CREEKS THAT FEED INTO ALLENDALE...AND OTHER AREAS
IN THE ELKHORN CREEK DRAINAGE ON THE SOUTHEAST SIDE OF TOWN...ARE
LIKELY TO BE EXPERIENCING SOME FLOODING.
ALTHOUGH ADDITIONAL RAINFALL AMOUNTS ARE EXPECTED TO BE LESS THAN A
HALF AN INCH...THIS RAINFALL IS FALLING ON ALREADY SATURATED SOIL
AND SPILLING INTO HIGH RUNNING CREEKS.
THIS INCLUDES INTERSTATE 25 BETWEEN MILE MARKERS 176 AND 197.
INTERSTATE 25 NEAR MILE POST 186 COULD BE FLOODING AS WELL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4269 10608 4270 10650 4299 10649 4298 10607
4283 10607 4275 10608 4272 10607
$$
21700
WGUS75 KRIW 090043
FFSRIW
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
643 PM MDT SUN MAY 8 2016
WYC025-090515-
/O.CON.KRIW.FF.W.0002.000000T0000Z-160509T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-
643 PM MDT SUN MAY 8 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT FOR
EAST CENTRAL NATRONA COUNTY...
AT 637 PM MDT...LAW ENFORCEMENT REPORTED THE NORTHBOUND LANE OF
INTERSTATE 25 AT MILE POST 185 WAS CLOSED DUE TO HIGH WATER. RAIN
HAS WEAKENED OR STOPPED ACROSS CASPER...BUT MORE RAIN COULD QUICKLY
DEVELOP THIS EVENING. ALTHOUGH ADDITIONAL RAINFALL AMOUNTS ARE
EXPECTED TO BE LESS THAN A HALF AN INCH...THIS RAINFALL IS FALLING
ON ALREADY SATURATED SOIL...AND IS SPILLING INTO HIGH RUNNING
CREEKS. THE LOCATION OF GREATEST CONCERN IS ON THE EAST SIDE OF
CASPER...IN THE ELKHORN CREEK DRAINAGE.
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 4269 10608 4270 10650 4299 10649 4298 10607
4283 10607 4275 10608 4272 10607
$$
21210
WGUS75 KRIW 090133
FFSRIW
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
733 PM MDT SUN MAY 8 2016
WYC025-090142-
/O.CAN.KRIW.FF.W.0002.000000T0000Z-160509T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NATRONA-
733 PM MDT SUN MAY 8 2016
...THE FLASH FLOOD WARNING FOR EAST CENTRAL NATRONA COUNTY IS
CANCELLED...
FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES.
LAT...LON 4269 10608 4270 10650 4299 10649 4298 10607
4283 10607 4275 10608 4272 10607
$$
21The office that day
Everything else NWS Riverton, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 6:57 PM MDT | River Flood Warning | RIW | Fremont | 61 hr |
| May 8, 3:07 PM MDT | Areal Flood Warning | RIW | Fremont | 24 hr |
| May 8, 4:04 PM MDT | Special Weather Statement | RIW | Hot Springs | 41 min |
| May 8, 5:59 PM MDT | Special Weather Statement | RIW | Fremont | 61 min |
Nearby
Flash Flood Warnings in Wyoming, 2016Every flash flood warning in 2016
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.