Alert archive / Wyoming / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 88, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 20, 2010, 1:59 PM MDT for Goshen County, Platte County, Wyoming. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 20, 2010, 1:59 PM MDT (19:59 UTC)
- Expired
- Jun 20, 2010, 2:34 PM MDT
- In force
- 35 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Goshen County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 107 km from the middle of the area, began a volume at 20:01 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 20, 1:30 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 8.0 hours before the alert went out and 261 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
- 20 J/kg
- Mixed-layer CIN
- -352 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -77 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jun 20, 4:39 AM MDT, 9 hours 20 minutes earlier.
Area forecast discussion, Jun 20, 4:39 AM MDT, 9 hours 20 minutes before
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</html>Hazardous weather outlook, Jun 20, 1:10 PM MDT, 49 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 110 PM MDT SUN JUN 20 2010 NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 211515- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-NORTH LARAMIE RANGE- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-SOUTH LARAMIE RANGE- SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL LARAMIE COUNTY- EAST LARAMIE COUNTY- 110 PM MDT SUN JUN 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS SHOULD FORM OVER PARTS OF FAR EASTERN WYOMING DURING THE AFTERNOON AND MOVE OVER THE NEBRASKA PANHANDLE LATE THIS AFTERNOON AND EVENING. A FEW STRONG TO SEVERE STORMS ARE POSSIBLE MAINLY OVER THE PANHANDLE WITH LARGE HAIL THE MAIN THREAT. ISOLATED TORNADOES WILL BE POSSIBLE THIS AFTERNOON...MAINLY EAST OF A DOUGLAS TO CHEYENNE LINE IN WYOMING. FOR NOW...THE NEBRASKA PANHANDLE REMAINS CAPPED AND SEVERE THUNDERSTORMS WILL OCCUR LATER THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN ON MONDAY AFTERNOON WITH A FEW STRONG OR SEVERE STORMS POSSIBLE AGAIN. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE NEEDED AFTER 2 PM TODAY FOR LOCATION EAST OF A LINE FROM DOUGLAS TO CHEYENNE THROUGH THE EARLY EVENING HOURS. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ104-105-109>115-211515- FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN- CENTRAL CARBON COUNTY-NORTH SNOWY RANGE FOOTHILLS- SOUTHWEST CARBON COUNTY-SIERRA MADRE RANGE- UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-LARAMIE VALLEY- 110 PM MDT SUN JUN 20 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
In the hours before
Local storm report, Jun 20, 9:29 AM MDT, 4 hours 30 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHEYENNE WY
929 AM MDT SUN JUN 20 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0503 PM HAIL 1 S WHEATLAND 42.04N 104.96W
06/19/2010 E0.50 INCH PLATTE WY TRAINED SPOTTER
RAINFALL ABOUT 0.20 INCHES.
0505 PM HAIL 14 E WHEATLAND 42.05N 104.69W
06/19/2010 E0.50 INCH PLATTE WY TRAINED SPOTTER
RAINFALL 0.50 INCHES MADE THE STREETS FLOODED AS THE
GUTTER WAS UNABLE TO HANDLE THE HEAVY RAIN. WIND GUSTS
BLEW DOWN SMALL TREE LIMBS. A FEW MARBLE SIZE HAIL.
0630 PM HAIL 4 N MULE CREEK JUNCTION 43.44N 104.22W
06/19/2010 E0.50 INCH NIOBRARA WY LAW ENFORCEMENT
0922 PM HAIL LYMAN 41.92N 104.04W
06/19/2010 E0.25 INCH SCOTTS BLUFF NE PUBLIC
VERY HEAVY RAIN.
0932 PM HAIL MORRILL 41.96N 103.92W
06/19/2010 E0.50 INCH SCOTTS BLUFF NE TRAINED SPOTTER
0934 PM HAIL MORRILL 41.96N 103.92W
06/19/2010 E0.75 INCH SCOTTS BLUFF NE TRAINED SPOTTER
HAIL WAS FALLING AND WAS DIME TO PENNY SIZE
0940 PM HAIL 5 S MORRILL 41.89N 103.92W
06/19/2010 E1.75 INCH SCOTTS BLUFF NE TRAINED SPOTTER
HAIL LASTED UNTIL 950PM.
0945 PM HAIL MITCHELL 41.94N 103.81W
06/19/2010 E1.25 INCH SCOTTS BLUFF NE TRAINED SPOTTER
HAIL QUARTER TO HALF DOLLAR SIZE.
0945 PM HAIL MORRILL 41.96N 103.92W
06/19/2010 E0.88 INCH SCOTTS BLUFF NE TRAINED SPOTTER
PENNY TO NICKEL SIZE
1014 PM HAIL 3 W SCOTTSBLUFF 41.87N 103.72W
06/19/2010 E0.75 INCH SCOTTS BLUFF NE TRAINED SPOTTER
1020 PM HAIL 3 WNW SCOTTSBLUFF 41.88N 103.72W
06/19/2010 E2.50 INCH SCOTTS BLUFF NE TRAINED SPOTTER
GOLFBALL TO TENNIS BALL SIZE HAIL.
1028 PM HAIL 3 WNW SCOTTSBLUFF 41.88N 103.72W
06/19/2010 E2.50 INCH SCOTTS BLUFF NE TRAINED SPOTTER
1040 PM HAIL 2 N SCOTTSBLUFF 41.90N 103.66W
06/19/2010 E2.75 INCH SCOTTS BLUFF NE PUBLIC
1046 PM HAIL SCOTTSBLUFF 41.87N 103.66W
06/19/2010 E1.75 INCH SCOTTS BLUFF NE TRAINED SPOTTER
1208 AM HAIL REDBIRD 43.24N 104.27W
06/20/2010 M1.25 INCH NIOBRARA WY TRAINED SPOTTER
&&
LUNDQUISTSpecial weather statement, Jun 20, 1:51 PM MDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 151 PM MDT SUN JUN 20 2010 WYZ103-106>108-202045- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY-EAST PLATTE COUNTY WY-GOSHEN COUNTY WY-NORTH LARAMIE RANGE WY- 151 PM MDT SUN JUN 20 2010 ...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHEASTERN ALBANY... CENTRAL PLATTE AND WESTERN GOSHEN COUNTIES UNTIL 245 PM MDT... AT 146 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 8 MILES NORTHWEST OF WHEATLAND TO 7 MILES NORTHWEST OF CHUGWATER...AND MOVING NORTHEAST AT 20 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... WHEATLAND... GRAYROCKS RESERVOIR... GLOMILL RESERVOIR... GUERNSEY... I-25 EXIT 65... I-25 EXIT 78... I-25 EXIT 84... I-25 EXIT 92... HARTVILLE... THESE STORMS MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR THIS AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. TJT
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 6:11 PM MDT | Areal Flood Advisory | CYS | Niobrara | 3 hr |
| Jun 19, 6:25 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 29 min |
| Jun 19, 9:21 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 54 min |
| Jun 20, 12:05 AM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 25 min |
| Jun 20, 3:24 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Platte | 51 min |
| Jun 20, 3:42 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 39 min |
| Jun 20, 3:56 PM MDT | Flash Flood Warning | CYS | Goshen, Platte | 5 hr |
| Jun 20, 4:02 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 58 min |
| Jun 20, 4:02 PM MDT | Tornado Warning | CYS | Goshen, Platte | 28 min |
| Jun 20, 4:30 PM MDT | Tornado Warning | CYS | Goshen, Laramie, Platte | 30 min |
| Jun 20, 4:58 PM MDT | Tornado Warning | CYS | Goshen, Platte | 32 min |
| Jun 20, 5:39 PM MDT | Severe Thunderstorm Warning | CYS | Goshen, Laramie | 51 min |
| Jun 20, 5:49 PM MDT | Tornado Warning | CYS | Converse | 41 min |
| Jun 19, 10:20 PM MDT | Severe Thunderstorm Warning | CYS | Box Butte, Morrill, Scotts Bluff, Sioux | 55 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2010Every severe thunderstorm warning in 2010
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.