Alert archive / Nebraska / Areal Flood Advisories in 2021
Areal Flood Advisory 13, NWS Cheyenne, WY
NWS Cheyenne, WY issued this areal flood advisory at Jul 9, 2021, 5:49 PM MDT for Box Butte County, Morrill County, Nebraska. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 9, 2021, 5:49 PM MDT (23:49 UTC)
- Expired
- Jul 9, 2021, 8:19 PM MDT
- In force
- 3 hr
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
Counties Box Butte County, NE, Morrill County, NE
The radar
The Cheyenne radar (KCYS), 172 km from the middle of the area, began a volume at 23:52 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 12:00Z, 11.8 hours before the alert went out and 224 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
- 93 J/kg
- Mixed-layer CIN
- -824 J/kg
- Mixed-layer LCL
- 1724 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before this areal flood advisory went out at Jul 9, 5:27 PM MDT, 22 minutes earlier.
Area forecast discussion, Jul 9, 5:27 PM MDT, 22 minutes before
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</html>Hazardous weather outlook, Jul 9, 1:42 PM MDT, 4 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Cheyenne WY 142 PM MDT Fri Jul 9 2021 NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-119-101945- Dawes County-Box Butte County-Scotts Bluff County-Banner County- Morrill County-Kimball County-Cheyenne County- Northern Sioux County-Southern Sioux County- Converse County Lower Elevations-Niobrara County- East Platte County-Goshen County-East Laramie County- 142 PM MDT Fri Jul 9 2021 This hazardous weather outlook is for portions of panhandle Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT SPC has issued a Marginal to Slight Risk for severe thunderstorms. Scattered to numerous showers and thunderstorms this afternoon into overnight hours with some thunderstorms being strong to severe with gusty, erratic winds, large hail, and heavy rainfall. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered showers and thunderstorms possible on Tuesday through Thursday. .Spotter information statement... Spotter activation may be needed. Spotters are encouraged to issue all reports to the National Weather Service Cheyenne office. WYZ105-111-112-114-115-101945- Shirley Basin-Southwest Carbon County-Sierra Madre Range- Snowy Range-Laramie Valley- 142 PM MDT Fri Jul 9 2021 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Elevated fire weather concerns through the afternoon for low humidity and gusty winds. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be needed. WYZ104-109-110-113-101945- Ferris/Seminoe/Shirley Mountains-Central Carbon County- North Snowy Range Foothills-Upper North Platte River Basin- 142 PM MDT Fri Jul 9 2021 This hazardous weather outlook is for portions of south central Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Red Flag Warning in effect through 8 PM MDT today for gusty winds and low humidity. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be needed. WYZ103-106-116>118-101945- North Laramie Range- Central Laramie Range and Southwest Platte County- South Laramie Range-South Laramie Range Foothills- Central Laramie County- 142 PM MDT Fri Jul 9 2021 This hazardous weather outlook is for portions of southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Isolated to scattered showers and thunderstorms this afternoon. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Scattered showers and thunderstorms possible on Tuesday through Thursday. .Spotter information statement... Spotter activation will not be needed.
In the hours before
Local storm report, Jul 9, 4:49 PM MDT, 1 hour before
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</html>Local storm report, Jul 9, 4:57 PM MDT, 52 minutes before
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</html>Local storm report, Jul 9, 5:19 PM MDT, 30 minutes before
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</html>Local storm report, Jul 9, 5:25 PM MDT, 24 minutes before
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</html>Local storm report, Jul 9, 5:38 PM MDT, 11 minutes before
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</html>Local storm report, Jul 9, 5:46 PM MDT, 3 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:31 PM MDT | Special Weather Statement | CYS | Laramie | 29 min |
| Jul 9, 1:58 PM MDT | Special Weather Statement | CYS | Laramie | 32 min |
| Jul 9, 2:20 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 40 min |
| Jul 9, 2:29 PM MDT | Special Weather Statement | CYS | Laramie | 31 min |
| Jul 9, 2:51 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 39 min |
| Jul 9, 2:58 PM MDT | Severe Thunderstorm Warning | CYS | Banner, Cheyenne, Kimball, Morrill | 47 min |
| Jul 9, 3:32 PM MDT | Special Weather Statement | CYS | Sioux | 28 min |
| Jul 9, 3:37 PM MDT | Severe Thunderstorm Warning | CYS | Cheyenne, Kimball | 42 min |
| Jul 9, 3:54 PM MDT | Severe Thunderstorm Warning | CYS | Dawes, Sioux | 36 min |
| Jul 9, 4:30 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes, Sioux | 45 min |
| Jul 9, 5:08 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Dawes | 52 min |
| Jul 9, 5:42 PM MDT | Tornado Warning | CYS | Box Butte | 33 min |
| Jul 9, 5:58 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill | 47 min |
Nearby
Areal Flood Advisories in Nebraska, 2021Every areal flood advisory in 2021
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.