Alert archive / Colorado / Special Weather Statements in 2012
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Jul 30, 2012, 2:09 PM MDT for Jefferson County, Colorado. It was in force for 36 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
- Jul 30, 2012, 2:09 PM MDT (20:09 UTC)
- Expired
- Jul 30, 2012, 2:45 PM MDT
- In force
- 36 min
- Issued by
- NWS Denver/Boulder, CO
County Jefferson County, CO
The radar
The Denver radar (KFTG), 72 km from the middle of the area, began a volume at 20:09 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 183 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
- 36 J/kg
- Mixed-layer CIN
- -260 J/kg
- Mixed-layer LCL
- 2058 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 30, 11:01 AM MDT, 3 hours 8 minutes earlier.
Area forecast discussion, Jul 30, 11:01 AM MDT, 3 hours 8 minutes before
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</head>
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<div class="status" id="status">Temporary Notice</div>
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</html>Hazardous weather outlook, Jul 30, 11:08 AM MDT, 3 hours 1 minute before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1108 AM MDT MON JUL 30 2012 COZ030>051-311200- 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- 1108 AM MDT MON JUL 30 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THERE WILL BE ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING WITH LOCALLY HEAVY RAINFALL POSSIBLE. THE STORMS WILL FIRST DEVELOP IN THE MOUNTAINS BY THE NOON HOUR AND THEN SPREAD EASTWARD ACROSS THE PLAINS THROUGH THE COURSE OF THE AFTERNOON AND EVENING. EXPECT HEAVY RAIN...FREQUENT LIGHTNING... SMALL HAIL...AND STRONG GUSTY WINDS UP TO 45 MPH FROM STORMS. THERE IS ENOUGH LOW LEVEL MOISTURE AND INSTABILITY ON THE NORTHEAST PLAINS FOR ONE OR TWO SEVERE STORMS WITH DAMAGING WINDS AND HAIL UP TO 1 INCH IN DIAMETER. THE MAIN THREAT FOR ANY SEVERE STORMS WOULD BE EAST OF A LINE FROM FORT MORGAN TO LIMON. GIVEN THE CONTINUED HIGH MOISTURE VALUES IN THE ATMOSPHERE...RAINFALL RATES AROUND ONE INCH IN 30 MINUTES CAN BE EXPECTED FROM THE STRONGEST STORMS. STORMS THAT TRAVEL OVER THE BURN SCARS MAY RESULT IN LOCALIZED FLOODING CONDITIONS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE FLOW OF MONSOONAL MOISTURE IS EXPECTED TO CONTINUE OVER COLORADO THROUGH MUCH OF THIS WEEK. THE CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS IN THE MOUNTAINS AND HIGH VALLEYS WILL CONTINUE THROUGH THE END OF THE WEEK. SOME OF THESE STORMS MAY PRODUCE LOCALLY HEAVY RAINFALL. ON THE PLAINS...THE CHANCE FOR SHOWERS WILL BE SLIGHTLY LOWER. THE BEST CHANCE OF STORMS WILL BE NEAR THE FOOTHILLS AND OVER THE I-25 URBAN CORRIDOR. TEMPERATURES ARE EXPECTED TO CONTINUE REACHING THE LOWER AND MID 90S ON THE PLAINS THROUGH THE WEEK. OVER THE WEEKEND...AN UPPER LEVEL TROUGH MOVING OVER MONTANA AND WYOMING MAY CUT OFF THE MONSOONAL MOISTURE OVER NORTHERN COLORADO WHICH WILL DECREASE THE AMOUNT OF SHOWER ACTIVITY OVER THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED TODAY OR TONIGHT. HOWEVER... ANY REPORTS OF HEAVY RAINFALL AND/OR FLOODING WOULD BE APPRECIATED. BARJENBRUCH/DANKERS
In the hours before
Local storm report, Jul 30, 12:55 PM MDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
1255 PM MDT MON JUL 30 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0251 PM TORNADO 2 NE MT EVANS 39.61N 105.62W
07/28/2012 CLEAR CREEK CO TRAINED SPOTTER
TORNADO ELEVATION ESTIMATED NEAR 11,900 TO 12,000 FT.
TORNADO WAS BRIEF WITH NO DAMAGE. TORNADO BECAME A FUNNEL
CLOUD AND DISSIPATED.
&&
JKSpecial weather statement, Jul 30, 2:09 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 209 PM MDT MON JUL 30 2012 COZ034-036-039-302045- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET CO- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET CO- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY CO- 209 PM MDT MON JUL 30 2012 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PARK COUNTY CENTRAL JEFFERSON COUNTY SOUTHEASTERN CLEAR CREEK COUNTY AT 209 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. THIS STORM WAS LOCATED 3 MILES SOUTHWEST OF PINE JUNCTION...OR 32 MILES SOUTHWEST OF DENVER...MOVING NORTHEAST AT 25 MPH. LOCATIONS IN THE ADVISORY INCLUDE BUT ARE NOT LIMITED TO PINE JUNCTION...PINE GROVE...TINY TOWN...KITTREDGE...INDIAN HILLS... IDLEDALE...HIGHLAND PARK...HARRIS PARK...FLOYD HILL...EVERGREEN... ECHO LAKE...CONIFER...BUFFALO CREEK...BROOKVALE...BLUE VALLEY... BERGEN PARK...BAILEY...ASPEN PARK AND SOUTHWESTERN GOLDEN. LAT...LON 3976 10523 3942 10515 3927 10547 3971 10563 TIME...MOT...LOC 2009Z 247DEG 23KT 3946 10535
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 2:30 PM MDT | Special Weather Statement | BOU | Grand | 30 min |
| Jul 30, 3:04 PM MDT | Special Weather Statement | BOU | Douglas | 26 min |
| Jul 30, 3:12 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 22 min |
| Jul 30, 3:27 PM MDT | Flash Flood Warning | BOU | Boulder | 78 min |
Nearby
Special Weather Statements in Colorado, 2012Every special weather statement in 2012
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.