Alert archive / Nebraska / Flash Flood Warnings in 2011
Flash Flood Warning 19, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jul 16, 2011, 11:30 PM MDT for Banner County, Morrill County, Scotts Bluff County, Nebraska. It was in force for 2 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 16, 2011, 11:30 PM MDT (05:30 UTC)
- Expired
- Jul 17, 2011, 1:45 AM MDT
- In force
- 2 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Banner County, NE, Morrill County, NE, Scotts Bluff County, NE
The radar
The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 05:33 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.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 5.5 hours before the alert went out and 218 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
- 1193 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 2264 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 288 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.8
The text
As transmitted, in the capitals the NWS used until 2016.
237
WGUS55 KCYS 170530
FFWCYS
NEC007-123-157-170830-
/O.NEW.KCYS.FF.W.0019.110717T0530Z-110717T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
1130 PM MDT SAT JUL 16 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EASTERN SCOTTS BLUFF COUNTY IN THE PANHANDLE OF NEBRASKA...
NORTHEASTERN BANNER COUNTY IN THE PANHANDLE OF NEBRASKA...
WESTERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...
* UNTIL 230 AM MDT
* AT 1128 PM MDT...TRAINED WEATHER SPOTTERS REPORTED SLOW MOVING
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 2.50
INCHES OF RAIN HAS FALLEN WITH THIS STORM IN SHORT PERIOD OF TIME.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ANGORA...BAYARD...CHIMNEY ROCK...HUBBARD GAP...LAKE MINATARE...
MINATARE AND REDINGTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 4153 10317 4153 10367 4200 10349 4200 10328
4201 10327 4201 10323 4200 10301
$$
MAZUR1 follow-up statement
299
WGUS75 KCYS 170745
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
145 AM MDT SUN JUL 17 2011
NEC007-123-157-170800-
/O.CAN.KCYS.FF.W.0019.000000T0000Z-110717T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANNER NE-MORRILL NE-SCOTTS BLUFF NE-
145 AM MDT SUN JUL 17 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN SCOTTS
BLUFF...WESTERN MORRILL AND NORTHEASTERN BANNER COUNTIES IS
CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. IF
FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW
ENFORCEMENT AGENCY.
LAT...LON 4153 10317 4153 10367 4200 10349 4200 10328
4201 10327 4201 10323 4200 10301
$$
MAZURThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 9:53 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Kimball | 58 min |
| Jul 16, 9:58 PM MDT | Tornado Warning | CYS | Kimball | 37 min |
| Jul 16, 10:15 PM MDT | Severe Thunderstorm Warning | CYS | Kimball | 35 min |
| Jul 16, 10:54 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Morrill, Scotts Bluff | 66 min |
| Jul 16, 11:27 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 48 min |
| Jul 16, 11:48 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 42 min |
Nearby
Flash Flood Warnings in Nebraska, 2011Every flash flood warning in 2011
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.