Alert archive / Colorado / Special Weather Statements in 2010
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Aug 16, 2010, 2:12 PM MDT for Elbert County, Colorado. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 16, 2010, 2:12 PM MDT (20:12 UTC)
- Expired
- Aug 16, 2010, 3:15 PM MDT
- In force
- 63 min
- Issued by
- NWS Denver/Boulder, CO
County Elbert County, CO
The radar
The Denver radar (KFTG), 60 km from the middle of the area, began a volume at 20:11 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 (KDNR), launched 12:00Z, 8.2 hours before the alert went out and 100 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
- 874 J/kg
- Mixed-layer CIN
- -179 J/kg
- Mixed-layer LCL
- 828 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this special weather statement went out at Aug 16, 2:58 AM MDT, 11 hours 14 minutes earlier.
Area forecast discussion, Aug 16, 2:58 AM MDT, 11 hours 14 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 258 AM MDT MON AUG 16 2010 .SHORT TERM...AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE AREA LATER THIS AFTN AND TONIGHT ALONG WITH SOME MID LEVEL QG ASCENT. ALTHOUGH SOUNDINGS SHOW A CAP ACROSS ALL OF NERN CO THIS AFTN AS MINOR COOLING ALOFT IN ASSOCIATION WITH UPPER LEVEL TROUGH COMES IN THIS SHOULD ERODE CAP BY MID TO LATE AFTN. MEANWHILE SFC LOW PRESSURE IS FCST TO BE JUST EAST OF DENVER BY EARLY AFTN WITH A CONVERGENCE ZONE SETTING UP FM FORT MORGAN TO LIMON. AS A RESULT BEST CHC OF TSTMS MAY END UP EAST OF THE FRONT RANGE URBAN CORRIDOR OVER THE PLAINS BY LATE AFTN. HOWEVER WITH DECENT INSTABILITY OVER MUCH OF THE AREA AND INCREASING QG ASCENT SCT TSTMS COULD DEVELOP JUST ABOUT ANYWHERE THRU THE EVENING HOURS. AS FAR AS SVR POTENTIAL MID LVL WINDS ARE FCST TO BE WEAKER TODAY HOWEVER WITH SOME COOLING ALOFT MAY SEE A FEW STORMS PRODUCE SOME HAIL. HIGHS TODAY OVER NERN CO WILL LOOKS TO BE A FEW DEGREES COOLER BASED ON 850-700 MB TEMPS. FOR TONIGHT AS MAIN UPPER LEVEL TROUGH MOVES ACROSS TSTMS WILL CONTINUE OVER THE PLAINS WITH SOME HEAVY RAINFALL POSSIBLE IF TRAINING OF CELLS OCCURS ALONG CONVERGENCE ZONE AS TALKED ABOUT ABOVE. ELSEWHERE EXPECT SOME LINGERING TSTMS IN THE MTNS AND ALONG THE FRONT RANGE THRU THE EARLY EVENING HOURS BEFORE ENDING. .LONG TERM...AFTER MONDAY NIGHTS PRECIPITATION COMES TO AN END...DRIER AND WARMER WEATHER WILL DOMINATE THE WEATHER PICTURE FOR MOST OF THE WEEK. HEIGHTS WILL BE RISING ALONG WITH LOWER AND MID-LEVEL TEMPERATURES. SUBSIDENCE ASSOCIATED WITH THE BUILDING RIDGE ON TUESDAY MAY INHIBIT THE DEVELOPMENT OF ANY SHOWERS TUESDAY AFTERNOON...DEPENDING ON HOW MUCH MOISTURE IS LEFT IN THE AIRMASS FROM MONDAY. FORECAST HAS 10 AND 20 PERCENT POPS TUESDAY AFTERNOON AND EVENING WHICH CAN BE REMOVED LATER IF LATER MODEL RUNS SHOW THE AIRMASS WILL BE TOO DRY TO SUPPORT SHOWERS. WEDNESDAY LOOKS LIKE IT WILL BE DRY AND VERY WARM AS THE RIDGE AXIS MOVES FROM THE MOUNTAINS OUT OVER THE PLAINS. THURSDAY MAY SEE ROUND OF AFTERNOON AND EVENING CONVECTION FROM A PASSING SHORT WAVE EMBEDDED IN THE ZONAL FLOW ALOFT WHICH MIGHT ALSO TAP INTO A BIT OF SUBTROPICAL MOISTURE ROTATING UP FROM MEXICO. AFTER THAT...ANOTHER RIDGE POPS UP OVER THE STATE FOR THE WEEKEND. THE ECMWF AND GFS BOTH AGREE THAT THE WEEKEND PERIOD COULD BE DRY DUE TO THE UPPER RIDGE OVER THE SOUTHERN TIER OF THE U.S. EXTENDING OUT TO THE SOUTHWEST OF CALIFORNIA. THAT PATTERN WOULD EFFECTIVELY CUT OFF ANY MONSOONAL MOISTURE COMING OUT OF MEXICO. MADE VERY FEW CHANGES TO THE FORECAST PACKAGE...SINCE MOST OF IT WAS ALREADY COVERED BY THE PREVIOUS FORECASTER. && .AVIATION...SFC LOW WAS CURRENTLY OVER DENVER BUT IS EXPECTED TO MOVE EAST OF DENVER BY LATE MORNING. STRATUS WAS DEVELOPING OVER THE PLAINS AND NR FORT COLLINS. ITS POSSIBLE SOME OF THIS STRATUS COULD WRAP AROUND SFC LOW TOWARDS SUNRISE AND AFFECT THE AIRPORT FOR AN HOUR OR TWO WITH IFR CONDITIONS. FOR LATER TODAY AM NOT SURE ABOUT TSTM COVERAGE AS MAIN CONVERGENCE ZONE WILL BE EAST OF THE AIRPORT THIS AFTN. HOWEVER WITH DECENT INSTABILITY AND APPROACHING UPPER LEVEL TROUGH SCT TSTMS COULD DEVELOP JUST ABOUT ANYWHERE AFTER 21Z THRU 02Z. IF A STORM DOES AFFECT THE AIRPORT COULD SEE BRIEF MVFR CONDITIONS DUE TO HEAVY RAIN. WINDS TODAY WILL BE DEPENDANT ON LOCATION OF MAIN SFC LOW. RIGHT NOW IF LOW ENDS UP BEING EAST OF THE AIRPORT THEN WINDS SHOULD HAVE A NNE COMPONENT FROM LATE MORNING THROUGH THE AFTN HOURS. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. RPK/KDRBY
Hazardous weather outlook, Aug 16, 10:36 AM MDT, 3 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1036 AM MDT MON AUG 16 2010 COZ030>051-171200- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1036 AM MDT MON AUG 16 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP TODAY AND BECOME MORE NUMEROUS OVER THE PLAINS OF NORTHEAST COLORADO THIS EVENING AS AN UPPER LEVEL TROUGH MOVES ACROSS THE AREA. A FEW OF THE STORMS MAY BECOME SEVERE OVER NORTHEAST COLORADO WITH LARGE HAIL AND STRONG WINDS. IN ADDITION SOME HEAVY RAINFALL WILL ALSO OCCUR OVER THE PLAINS WITH A FEW INCHES POSSIBLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY TUESDAY AND WEDNESDAY WILL HAVE VERY LITTLE CONVECTIVE ACTIVITY COMPARED TO MONDAY AS AN UPPER RIDGE BUILDS OVERHEAD. ANOTHER SHORTWAVE WEDNESDAY NIGHT THROUGH THURSDAY WILL INCREASE SHOWER AND THUNDERSTORM COVERAGE...HOWEVER NO HAZARDOUS WEATHER IS EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. MEIER/KRIEDERMAN
In the hours before
Special weather statement, Aug 16, 1:55 PM MDT, 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 155 PM MDT MON AUG 16 2010 COZ035-038-043-162030- CENTRAL AND SOUTH WELD COUNTY CO- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY CO- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET CO- 155 PM MDT MON AUG 16 2010 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN LARIMER COUNTY NORTHWESTERN WELD COUNTY AT 155 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS STORM WAS LOCATED 4 MILES SOUTHEAST OF VIRGINIA DALE...OR 26 MILES NORTHWEST OF FORT COLLINS...MOVING EAST AT 35 MPH. LOCATIONS IN THE ADVISORY INCLUDE BUT ARE NOT LIMITED TO WELLINGTON...VIRGINIA DALE...TEDS PLACE...POUDRE PARK...NATURAL FORT REST AREA...MISHOWAKA...LIVERMORE...CARR...BELLVUE AND NORTHERN FORT COLLINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM WILL PRODUCE DANGEROUS CLOUD-TO-GROUND LIGHTNING. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES AND MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING LAND LINE TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE IN DANGER OF BEING STRUCK BY LIGHTNING. && LAT...LON 4100 10480 4056 10494 4063 10542 4099 10551 TIME...MOT...LOC 1955Z 275DEG 30KT 4091 10528 BAKER
Local storm report, Aug 16, 2:04 PM MDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
204 PM MDT MON AUG 16 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0157 PM TORNADO N DEER TRAIL 39.62N 104.04W
08/16/2010 ARAPAHOE CO TRAINED SPOTTER
&&
JKSpecial weather statement, Aug 16, 2:12 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 212 PM MDT MON AUG 16 2010 COZ036-041-046-162115- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET CO- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY CO-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET CO- 212 PM MDT MON AUG 16 2010 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ELBERT COUNTY SOUTHEASTERN DOUGLAS COUNTY AT 212 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE HAIL. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 28 MILES EAST OF KIOWA TO NEAR GREENLAND...OR ALONG A LINE EXTENDING FROM 20 MILES NORTHWEST OF LIMON TO 20 MILES NORTH OF COLORADO SPRINGS...MOVING EAST AT 20 MPH. LOCATIONS IN THE ADVISORY INCLUDE BUT ARE NOT LIMITED TO KIOWA... GREENLAND AND ELBERT. PRECAUTIONARY/PREPAREDNESS ACTIONS... THUNDERSTORMS OCCASIONALLY PRODUCE WEAK...SHORT-LIVED TORNADOES WITH LITTLE OR NO ADVANCE WARNING. THESE WEAK TORNADOES ARE CAPABLE OF PRODUCING MINOR DAMAGE SO IF A TORNADO IS OBSERVED MOVE TO A PLACE OF SAFETY. && LAT...LON 3946 10371 3913 10425 3913 10500 3947 10415 TIME...MOT...LOC 2012Z 270DEG 17KT 3946 10392 3915 10478 BAKER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 8:05 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Boulder, Broomfield, Weld | 40 min |
| Aug 15, 11:25 PM MDT | Special Weather Statement | BOU | Park | 50 min |
| Aug 15, 11:51 PM MDT | Areal Flood Advisory | BOU | Douglas, Jefferson | 84 min |
| Aug 16, 1:55 PM MDT | Special Weather Statement | BOU | Larimer | 35 min |
| Aug 16, 1:55 PM MDT | Tornado Warning | BOU | Arapahoe | 41 min |
| Aug 16, 2:04 PM MDT | Tornado Warning | BOU | Elbert | 41 min |
| Aug 16, 3:12 PM MDT | Special Weather Statement | BOU | Elbert | 48 min |
| Aug 16, 3:25 PM MDT | Special Weather Statement | BOU | Morgan | 50 min |
| Aug 16, 3:35 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 12 min |
| Aug 16, 3:57 PM MDT | Tornado Warning | BOU | Morgan | 33 min |
| Aug 16, 4:25 PM MDT | Tornado Warning | BOU | Logan, Morgan, Weld | 29 min |
| Aug 16, 4:58 PM MDT | Special Weather Statement | BOU | Logan | 62 min |
| Aug 16, 5:39 PM MDT | Areal Flood Advisory | BOU | Logan | 81 min |
Nearby
Special Weather Statements in Colorado, 2010Every special weather statement 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.