Alert archive / Nebraska / Flash Flood Warnings in 2016

Flash Flood Warning 8, NWS Cheyenne, WY

June 30, 2016Kimball County, Nebraska; Laramie County, Wyoming

NWS Cheyenne, WY issued this flash flood warning at Jun 30, 2016, 6:30 PM MDT for Kimball County, Nebraska; Laramie County, Wyoming. It was in force for 6 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 30, 2016, 6:30 PM MDT (00:30 UTC)
Expired: Jul 1, 2016, 12:30 AM MDT
In force: 6 hr
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Flood severity: None

Counties Kimball County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 00:33 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 was reported inside it

Time	Report	Where	Remark
Jun 30, 6:52 PM MDT	HEAVY RAIN 1.51	6 S Bushnell, NE	DRAW THAT RUNS BY HIS HOUSE IS RUNNING HIGH BUT NOT FLOODED YET.
Jun 30, 7:14 PM MDT	FLASH FLOOD	10 S Bushnell, NE	DEPUTY REPORTED COUNTY ROADS 17...24 AND 16 FLOODED SOUTH OF BUSHNELL.
Jun 30, 8:28 PM MDT	HEAVY RAIN 1.3	15 Sw Kimball, NE	GROUND SATURATED BUT RAIN HAS STOPPED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.5 hours before the alert went out and 155 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 4 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1296 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted.

458 
WGUS55 KCYS 010030
FFWCYS
NEC105-WYC021-010630-
/O.NEW.KCYS.FF.W.0008.160701T0030Z-160701T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
630 PM MDT THU JUN 30 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...
  SOUTHEASTERN LARAMIE COUNTY IN SOUTHEASTERN WYOMING...

* UNTIL 1230 AM MDT
    
* AT 630 PM MDT...LOCAL LAW ENFORCEMENT REPORTED A THUNDERSTORM
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  PINE BLUFFS...OLIVER RESERVOIR...OLIVER CAMPGROUND...PANORAMA POINT
  AND BUSHNELL.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 1.5 INCHES ARE ARE POSSIBLE IN
THE WARNED AREA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 400 AND 402.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND 16.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4127 10373 4101 10375 4101 10409 4129 10413

$$

CLAYCOMB

1 follow-up statement

195 
WGUS75 KCYS 010249
FFSCYS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
849 PM MDT THU JUN 30 2016

NEC105-WYC021-010259-
/O.CAN.KCYS.FF.W.0008.000000T0000Z-160701T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KIMBALL NE-LARAMIE WY-
849 PM MDT THU JUN 30 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN KIMBALL AND SOUTHEASTERN
LARAMIE COUNTIES 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 4127 10373 4101 10375 4101 10409 4129 10413

$$

CLAYCOMB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 2:21 PM MDT	Special Weather Statement	CYS	Dawes	39 min
Jul 1, 3:06 PM MDT	Special Weather Statement	CYS	Sioux	24 min
Jul 1, 3:16 PM MDT	Flash Flood Warning	CYS	Sioux	3 hr
Jul 1, 3:33 PM MDT	Special Weather Statement	CYS	Kimball	42 min
Jul 1, 3:39 PM MDT	Flash Flood Warning	CYS	Kimball	3 hr
Jul 1, 3:43 PM MDT	Special Weather Statement	CYS	Dawes	47 min
Jul 1, 4:27 PM MDT	Special Weather Statement	CYS	Kimball	48 min
Jul 1, 4:41 PM MDT	Special Weather Statement	CYS	Box Butte	49 min
Jul 1, 2:41 PM MDT	Special Weather Statement	CYS	Goshen	49 min
Jul 1, 5:37 PM MDT	Special Weather Statement	CYS	Niobrara	38 min

Nearby

Flash Flood Warnings in Nebraska, 2016 Flash Flood Warnings in Wyoming, 2016 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.