Alert archive / Wyoming / High Wind Warnings in 2010

High Wind Warning 21, NWS Riverton, WY

December 29, 2010Fremont County, Natrona County, Sweetwater County, Wyoming

NWS Riverton, WY issued this high wind warning at Dec 29, 2010, 4:03 AM MST for Fremont County, Natrona County, Sweetwater County, Wyoming. It was in force for 10 hr. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 29, 2010, 4:03 AM MST (11:03 UTC)
Expired
Dec 29, 2010, 2:13 PM MST
In force
10 hr
Issued by
NWS Riverton, WY

Counties Fremont County, WY, Natrona County, WY, Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 65 km from the middle of the area, began a volume at 11:03 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.

What was reported inside it

TimeReportWhereRemark
Dec 29, 9:09 AM MSTSNOW 123 Nw Dubois, WYBROOKS LAKE LODGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 11.1 hours before the alert went out and 62 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-pSkew-T log-p diagram, Riverton, WY at 00:00Z on 2010-12-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2010-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2082 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

414 
WWUS75 KRIW 291103
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
403 AM MST WED DEC 29 2010

...VERY STRONG WINDS ARE EXPECTED ACROSS PORTIONS OF CENTRAL
WYOMING TODAY...

.A POWERFUL STORM SYSTEM WILL MOVE INTO THE INTERMOUNTAIN WEST
TODAY. THIS SYSTEM WILL RESULT IN STRONG SOUTHWEST WINDS ALOFT.
THESE VERY STRONG WINDS WILL MIX DOWN ACROSS THE BEAVER RIM TO
CASPER AREA TODAY.

WYZ019-020-291915-
/O.UPG.KRIW.HW.A.0018.000000T0000Z-101230T0000Z/
/O.NEW.KRIW.HW.W.0021.101229T1103Z-101230T0100Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF...JEFFREY CITY...CASPER
403 AM MST WED DEC 29 2010

...HIGH WIND WARNING IN EFFECT UNTIL 6 PM MST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT UNTIL 6 PM MST THIS EVENING. THE
HIGH WIND WATCH IS NO LONGER IN EFFECT. 

* SUMMARY AND TIMING...SOUTHWEST WINDS WILL REMAIN STRONG BUT ARE
  EXPECTED TO CONTINUE TO INCREASE IN SPEED TODAY. THE STRONGEST
  WINDS ARE EXPECTED FROM AROUND DAYBREAK THROUGH MID AFTERNOON TODAY. 

* WIND...SOUTH SOUTHWEST TO SOUTHWEST WINDS 30 TO 45 MPH...WITH
  GUSTS 60 TO 65 MPH ARE EXPECTED ALONG WITH ISOLATED HIGHER GUSTS
  OF 80 MPH. CASPER HAS ALREADY RECEIVED A WIND GUST OF 61 MPH FROM
  THE SOUTHWEST AT 4 AM THIS MORNING.

* IMPACTS...STRONG WINDS MAY MAKE TRAVEL HAZARDOUS ALONG HIGHWAYS
  287 AND 220 FROM BEAVER RIM TO NEAR MUDDY GAP TO CASPER. IN THE
  CASPER AREA...THE STRONGEST WINDS ARE EXPECTED TO BE ALONG
  WYOMING BOULEVARD ON THE SOUTHEAST SIDE OF CASPER WHERE SOME
  WIND GUSTS COULD REACH 80 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED
OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS
OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$
2 follow-up statements
453 
WWUS75 KRIW 291910
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
1210 PM MST WED DEC 29 2010

...VERY STRONG WINDS ARE EXPECTED ACROSS PORTIONS OF CENTRAL
WYOMING TODAY...

.A POWERFUL STORM SYSTEM WILL MOVE INTO THE INTERMOUNTAIN WEST
TODAY. THIS SYSTEM WILL RESULT IN STRONG SOUTHWEST WINDS ALOFT.
THESE VERY STRONG WINDS WILL MIX DOWN ACROSS THE BEAVER RIM TO
CASPER AREA TODAY.

WYZ019-020-300100-
/O.CON.KRIW.HW.W.0021.000000T0000Z-101230T0100Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF...JEFFREY CITY...CASPER
1210 PM MST WED DEC 29 2010

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS
EVENING...

A HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS
EVENING. 

* SUMMARY AND TIMING...SOUTHWEST WINDS WILL REMAIN STRONG THIS
  AFTERNOON. THE STRONGEST WINDS ARE EXPECTED THROUGH MID
  AFTERNOON TODAY.

* WIND...SOUTH SOUTHWEST TO SOUTHWEST WINDS 30 TO 45 MPH...WITH
  GUSTS 60 TO 65 MPH ARE EXPECTED ALONG WITH ISOLATED HIGHER GUSTS
  OF 80 MPH. CASPER HAS BEEN RECEIVING WINDS OF 40 TO 45 MPH WITH
  GUSTS IN EXCESS OF 60 MPH THROUGHOUT THE MORNING HOURS. AREAS OF
  THE GREEN MOUNTAINS AND RATTLESNAKE RANGE HAVE ALSO SEEN WIND IN
  EXCESS OF 40 MPH WITH GUSTS TO AROUND 60 MPH TODAY. 

* IMPACTS...STRONG WINDS MAY MAKE TRAVEL HAZARDOUS ALONG 
  HIGHWAYS 287 AND 220 FROM BEAVER RIM TO NEAR MUDDY GAP TO 
  CASPER. IN THE CASPER AREA...THE STRONGEST WINDS ARE EXPECTED 
  TO BE ALONG WYOMING BOULEVARD ON THE SOUTHEAST SIDE OF CASPER 
  WHERE SOME WIND GUSTS COULD REACH 80 MPH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS A HAZARDOUS HIGH WIND EVENT IS EXPECTED
OR OCCURRING. SUSTAINED WIND SPEEDS OF AT LEAST 40 MPH OR GUSTS
OF 58 MPH OR MORE CAN LEAD TO PROPERTY DAMAGE.

&&

$$
868 
WWUS75 KRIW 292113
NPWRIW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
213 PM MST WED DEC 29 2010

...WIND SPEEDS ARE LOWERING ACROSS THE AREA...

WYZ019-020-292215-
/O.CAN.KRIW.HW.W.0021.000000T0000Z-101230T0100Z/
GREEN MOUNTAINS AND RATTLESNAKE RANGE-
NATRONA COUNTY LOWER ELEVATIONS-
INCLUDING THE CITIES OF...JEFFREY CITY...CASPER
213 PM MST WED DEC 29 2010

...HIGH WIND WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS CANCELLED THE HIGH
WIND WARNING. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 28, 5:41 PM MSTHigh Wind WatchRIWFremont, Natrona, Sweetwater10 hr
Dec 29, 4:39 AM MSTWinter Storm WatchRIWFremont, Hot Springs, Natrona, Sublette, Sweetwater10 hr

Nearby

High Wind Warnings in Wyoming, 2010Every high wind 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.