Alert archive / Nebraska / Flash Flood Warnings in 2016

Flash Flood Warning 10, NWS Cheyenne, WY

July 1, 2016Kimball County, Nebraska; Laramie County, Wyoming

NWS Cheyenne, WY issued this flash flood warning at Jul 1, 2016, 3:39 PM MDT for Kimball County, Nebraska; Laramie County, Wyoming. It was in force for 3 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
Jul 1, 2016, 3:39 PM MDT (21:39 UTC)
Expired
Jul 1, 2016, 6:45 PM MDT
In force
3 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), 70 km from the middle of the area, began a volume at 21:39 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

Denver, CO (KDEN), launched 12:00Z, 9.7 hours before the alert went out and 156 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, Denver, CO at 12:00Z on 2016-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2016-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
23 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
934 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

520 
WGUS55 KCYS 012139
FFWCYS
NEC105-WYC021-020045-
/O.NEW.KCYS.FF.W.0010.160701T2139Z-160702T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
339 PM MDT FRI JUL 1 2016

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

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

* UNTIL 645 PM MDT
    
* AT 338 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN NEAR THE LARAMIE COUNTY LINE WITH KIMBALL COUNTY.
  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 UP TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 401 AND 402.
 INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND 13.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4127 10409 4126 10379 4100 10378 4100 10408

$$

CLAYCOMB
1 follow-up statement
618 
WGUS75 KCYS 012311
FFSCYS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
511 PM MDT FRI JUL 1 2016

NEC105-WYC021-012320-
/O.CAN.KCYS.FF.W.0010.000000T0000Z-160702T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KIMBALL NE-LARAMIE WY-
511 PM MDT FRI JUL 1 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN KIMBALL AND EAST CENTRAL
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 10409 4126 10379 4100 10378 4100 10408

$$

CLAYCOMB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 6:30 PM MDTFlash Flood WarningCYSKimball6 hr
Jul 1, 2:21 PM MDTSpecial Weather StatementCYSDawes39 min
Jul 1, 3:06 PM MDTSpecial Weather StatementCYSSioux24 min
Jul 1, 3:16 PM MDTFlash Flood WarningCYSSioux3 hr
Jul 1, 3:33 PM MDTSpecial Weather StatementCYSKimball42 min
Jul 1, 3:43 PM MDTSpecial Weather StatementCYSDawes47 min
Jul 1, 4:27 PM MDTSpecial Weather StatementCYSKimball48 min
Jul 1, 4:41 PM MDTSpecial Weather StatementCYSBox Butte49 min
Jul 1, 2:41 PM MDTSpecial Weather StatementCYSGoshen49 min
Jul 1, 5:37 PM MDTSpecial Weather StatementCYSNiobrara38 min

Nearby

Flash Flood Warnings in Nebraska, 2016Flash 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.