Alert archive / Nebraska / Flash Flood Warnings in 2016
Flash Flood Warning 11, NWS Cheyenne, WY
NWS Cheyenne, WY issued this flash flood warning at Jul 22, 2016, 6:50 PM MDT for Cheyenne County, Morrill County, Nebraska. 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 22, 2016, 6:50 PM MDT (00:50 UTC)
- Expired
- Jul 22, 2016, 9:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cheyenne County, NE, Morrill County, NE
The radar
The Cheyenne radar (KCYS), 178 km from the middle of the area, began a volume at 00:51 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
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.8 hours before the alert went out and 181 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
- 5536 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1380 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 3.1
The text
As transmitted.
324
WGUS55 KCYS 230050
FFWCYS
NEC033-123-230345-
/O.NEW.KCYS.FF.W.0011.160723T0050Z-160723T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
650 PM MDT FRI JUL 22 2016
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN CHEYENNE COUNTY IN THE PANHANDLE OF NEBRASKA...
SOUTHEASTERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA...
* UNTIL 945 PM MDT
* AT 646 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
VERY HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN
HAS ALREADY FALLEN. AN ADDITIONAL INCH OF RAINFALL IS
POSSIBLE. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MAINLY RURAL AREAS OF SOUTHEAST MORRILL AND NORTHEAST CHEYENNE
COUNTIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
&&
LAT...LON 4116 10291 4183 10290 4186 10268 4175 10267
4173 10264 4142 10264 4138 10261 4117 10261
4116 10262
$$
HAMMER2 follow-up statements
172
WGUS75 KCYS 230224
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
824 PM MDT FRI JUL 22 2016
NEC033-123-230345-
/O.CON.KCYS.FF.W.0011.000000T0000Z-160723T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHEYENNE NE-MORRILL NE-
824 PM MDT FRI JUL 22 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MDT FOR
NORTHEASTERN CHEYENNE AND SOUTHEASTERN MORRILL COUNTIES...
AT 821 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES THAT 2 TO 4
INCHES OF RAIN HAS FALLEN...WITH LOCAL AMOUNTS OF UP TO 5 INCHES
ACROSS NORTHEAST CHEYENNE COUNTY. FLASH FLOODING IS LIKELY.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
MAINLY RURAL AREAS OF SOUTHEAST MORRILL AND NORTHEAST CHEYENNE
COUNTIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. TURN AROUND...DONT DROWN.
&&
LAT...LON 4116 10291 4183 10290 4186 10268 4175 10267
4173 10264 4142 10264 4138 10261 4117 10261
4116 10262
$$
HAMMER479
WGUS75 KCYS 230338
FFSCYS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
938 PM MDT FRI JUL 22 2016
NEC033-123-230346-
/O.EXP.KCYS.FF.W.0011.000000T0000Z-160723T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHEYENNE NE-MORRILL NE-
938 PM MDT FRI JUL 22 2016
...THE FLASH FLOOD WARNING FOR NORTHEASTERN CHEYENNE AND SOUTHEASTERN
MORRILL COUNTIES WILL EXPIRE AT 945 PM MDT...
THE HEAVY RAIN HAS ENDED AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. HOWEVER...CREEKS AND SMALL STREAMS MAY STILL BE RUNNING
HIGH. NEVER DRIVE YOUR VEHICLE THROUGH A FLOODED ROADWAY. THE WATER
MAY BE TOO DEEP TO ALLOW YOU TO CROSS SAFELY. TURN AROUND...DONT
DROWN.
REPORT FLOODING TO YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE.
LAT...LON 4116 10291 4183 10290 4186 10268 4175 10267
4173 10264 4142 10264 4138 10261 4117 10261
4116 10262
$$
HAMMERThe office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 6:09 PM MDT | Special Weather Statement | CYS | Box Butte | 51 min |
| Jul 22, 7:34 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Morrill | 41 min |
| Jul 22, 8:13 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne | 31 min |
Nearby
Flash Flood Warnings in Nebraska, 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.