Alert archive / Nebraska / Flash Flood Warnings in 2013

Flash Flood Warning 2, NWS Cheyenne, WY

June 22, 2013Banner County, Kimball County, Nebraska

NWS Cheyenne, WY issued this flash flood warning at Jun 22, 2013, 7:32 PM MDT for Banner County, Kimball County, Nebraska. It was in force for 6 hr. 1 report 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 22, 2013, 7:32 PM MDT (01:32 UTC)
Expired: Jun 23, 2013, 1:30 AM MDT
In force: 6 hr
Issued by: NWS Cheyenne, WY
Area: Storm-based polygon
Flood severity: None

Counties Banner County, NE, Kimball County, NE

The radar

The Cheyenne radar (KCYS), 80 km from the middle of the area, began a volume at 01:33 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 22, 8:30 PM MDT	FLASH FLOOD	10 S Harrisburg, NE	HEAVY RAIN FROM THUNDERSTORMS PRODUCED FLASH FLOODING OVER MUCH OF SOUTHERN BANNER COUNTY. MANY ROADS WERE UNDER WATER AND WERE DAMAGED.

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

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 1.5 hours before the alert went out and 179 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: 652 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 2701 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -29 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

504 
WGUS55 KCYS 230132
FFWCYS
NEC007-105-230730-
/O.NEW.KCYS.FF.W.0002.130623T0132Z-130623T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
732 PM MDT SAT JUN 22 2013

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN KIMBALL COUNTY IN THE PANHANDLE OF NEBRASKA...
  SOUTHERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...

* UNTIL 130 AM MDT SUNDAY

* AT 729 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA.  RADAR INDICATES ALMOST 3 INCHES OF RAIN HAS          
  OCCURRED OVER THE PAST 3 HOURS WITH AN ADDITIONAL 1 INCH OF RAIN   
  POSSIBLE OVER THE NEXT FEW HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO   
  OCCUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
CHEYENNE.

&&

LAT...LON 4139 10405 4140 10405 4157 10404 4150 10352
      4126 10353 4125 10405

$$

FINCH

1 follow-up statement

762 
WGUS75 KCYS 230450
FFSCYS

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1050 PM MDT SAT JUN 22 2013

NEC007-105-230506-
/O.CAN.KCYS.FF.W.0002.000000T0000Z-130623T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANNER NE-KIMBALL NE-
1050 PM MDT SAT JUN 22 2013

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN KIMBALL
AND SOUTHERN BANNER COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4139 10405 4140 10405 4157 10404 4150 10352
      4126 10353 4125 10405

$$

HAHN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 6:13 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Kimball	62 min
Jun 22, 6:18 PM MDT	Special Weather Statement	CYS	Box Butte	42 min
Jun 22, 6:20 PM MDT	Special Weather Statement	CYS	Morrill	40 min
Jun 22, 6:27 PM MDT	Severe Thunderstorm Warning	CYS	Morrill	48 min
Jun 22, 6:40 PM MDT	Special Weather Statement	CYS	Banner	50 min
Jun 22, 6:56 PM MDT	Tornado Warning Tornado observed	CYS	Cheyenne, Kimball	34 min
Jun 22, 7:11 PM MDT	Areal Flood Advisory	CYS	Banner, Kimball	6 hr
Jun 22, 7:13 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	62 min
Jun 22, 7:25 PM MDT	Special Weather Statement	CYS	Kimball	50 min
Jun 22, 7:40 PM MDT	Special Weather Statement	CYS	Kimball	50 min
Jun 22, 7:51 PM MDT	Special Weather Statement	CYS	Cheyenne	39 min

Nearby

Flash Flood Warnings in Nebraska, 2013 Every flash flood warning in 2013

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.