Alert archive / Nebraska / Flash Flood Watches in 2019

Flash Flood Watch 2, NWS Cheyenne, WY

June 3, 2019Laramie County, Wyoming; 4 counties in Nebraska

NWS Cheyenne, WY issued this flash flood watch at Jun 3, 2019, 3:02 AM MDT for Laramie County, Wyoming; 4 counties in Nebraska. It took effect at Jun 3, 2019, 2:00 PM MDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jun 3, 2019, 3:02 AM MDT (09:02 UTC)
In effect from: Jun 3, 2019, 2:00 PM MDT
Expired: Jun 3, 2019, 8:00 PM MDT
In force: 6 hr
Issued by: NWS Cheyenne, WY
Flood severity: None

Counties Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Laramie County, WY

The radar

The Cheyenne radar (KCYS), 102 km from the middle of the area, began a volume at 09:06 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 00:00Z, 9.0 hours before the alert went out and 173 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: 5 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 2539 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Jun 3, 12:02 AM MDT, 3 hours earlier.

Area forecast discussion, Jun 3, 12:02 AM MDT, 3 hours before

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Hazardous weather outlook, Jun 2, 4:30 PM MDT, 10 hours 32 minutes before

Hazardous Weather Outlook
National Weather Service Cheyenne WY
430 PM MDT Sun Jun 2 2019

NEZ002-003-019>021-054-055-095-096-WYZ101>103-105>108-115>119-
031915-
Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-
North Sioux-South Sioux-Converse County Lower Elevations-
Niobrara County-North Laramie Range-Shirley Basin-
Central Laramie Range and Southwest Platte County-
East Platte County-Goshen County-Laramie Valley-
South Laramie Range-South Laramie Range Foothills-
Central Laramie County-East Laramie County-
430 PM MDT Sun Jun 2 2019

This hazardous weather outlook is for western Nebraska and
most of southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A Severe Thunderstorm Watch is in effect for most of southeast
Wyoming and western Nebraska this afternoon through this evening.
Scattered thunderstorms will continue to develop across the area.
These storms will become strong to severe over the next few hours as
they move eastward. Thunderstorms will continue through 900 PM MDT
this evening.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Thunderstorms are expected each afternoon through the week with
lower chances on Thursday and Friday.

.Spotter information statement...

Spotter are urged to report severe weather and flash flooding to
the National Weather Service today through late this evening.

WYZ104-109>114-031915-
Ferris/Seminoe/Shirley Mountains-Central Carbon County-
North Snowy Range Foothills-Southwest Carbon County-
Sierra Madre Range-Upper North Platte River Basin-Snowy Range-
430 PM MDT Sun Jun 2 2019

This hazardous weather outlook is for portions of south central
Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Isolated to widely scattered thunderstorms will continue this
afternoon and into early this evening. Small hail and gusty winds
are possible in and near these thunderstorms.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Thunderstorms are expected each afternoon through the week with
lower chances on Thursday and Friday.

.Spotter information statement...

Spotter activation is unlikely this afternoon, but spotters are
urged to contact the National Weather Service to report stronger
wind gusts and hail sizes.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 2, 6:22 PM MDT	Severe Thunderstorm Warning	CYS	Converse, Goshen, Niobrara, Platte	38 min
Jun 2, 6:26 PM MDT	Areal Flood Advisory	CYS	Laramie	3 hr
Jun 2, 6:33 PM MDT	Special Weather Statement	CYS	Laramie	42 min
Jun 2, 6:50 PM MDT	Special Weather Statement	CYS	Goshen	40 min
Jun 3, 11:43 AM MDT	Special Weather Statement	CYS	Laramie	47 min
Jun 3, 12:13 PM MDT	Special Weather Statement	CYS	Laramie	47 min
Jun 3, 12:24 PM MDT	Special Weather Statement	CYS	Laramie	51 min
Jun 3, 2:07 PM MDT	Special Weather Statement	CYS	Laramie	38 min
Jun 3, 2:47 PM MDT	Special Weather Statement	CYS	Goshen	28 min
Jun 3, 2:50 PM MDT	Special Weather Statement	CYS	Laramie	25 min
Jun 3, 3:25 PM MDT	Special Weather Statement	CYS	Laramie	50 min
Jun 3, 3:53 PM MDT	Special Weather Statement	CYS	Laramie	37 min
Jun 3, 4:15 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	30 min
Jun 3, 4:40 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	35 min
Jun 3, 4:45 PM MDT	Special Weather Statement	CYS	Goshen	30 min
Jun 2, 6:03 PM MDT	Severe Thunderstorm Warning	CYS	Dawes, Sioux	42 min
Jun 2, 6:18 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	24 min
Jun 2, 6:38 PM MDT	Special Weather Statement	CYS	Dawes	52 min
Jun 2, 6:43 PM MDT	Special Weather Statement	CYS	Kimball	47 min
Jun 2, 6:50 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Cheyenne, Kimball, Morrill	25 min
Jun 2, 6:56 PM MDT	Special Weather Statement	CYS	Box Butte	49 min
Jun 2, 7:17 PM MDT	Special Weather Statement	CYS	Morrill	43 min
Jun 2, 8:03 PM MDT	Special Weather Statement	CYS	Cheyenne	27 min
Jun 3, 2:42 PM MDT	Areal Flood Advisory	CYS	Dawes	36 hr
Jun 3, 4:59 PM MDT	Severe Thunderstorm Warning	CYS	Kimball	31 min

Nearby

Flash Flood Watches in Nebraska, 2019 Flash Flood Watches in Wyoming, 2019 Every flash flood watch in 2019

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.