Alert archive / Colorado / Special Weather Statements in 2014
Special Weather Statement, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this special weather statement at Jun 18, 2014, 6:33 PM MDT for Broomfield County, Colorado. It was in force for 27 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
- Jun 18, 2014, 6:33 PM MDT (00:33 UTC)
- Expired
- Jun 18, 2014, 7:00 PM MDT
- In force
- 27 min
- Issued by
- NWS Denver/Boulder, CO
County Broomfield County, CO
The radar
The Denver radar (KFTG), 33 km from the middle of the area, began a volume at 00:32 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, 0.6 hours before the alert went out and 136 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
- 382 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 2444 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 391 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 Jun 18, 3:30 PM MDT, 3 hours 3 minutes earlier.
Area forecast discussion, Jun 18, 3:30 PM MDT, 3 hours 3 minutes before
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</html>Hazardous weather outlook, Jun 18, 10:51 AM MDT, 7 hours 42 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1051 AM MDT WED JUN 18 2014 COZ030>051-191700- 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- 1051 AM MDT WED JUN 18 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT THERE WILL BE A CHANCE OF THUNDERSTORMS THIS AFTERNOON INTO THE EARLY EVENING HOURS. A FEW STORMS COULD BECOME SEVERE OVER THE FAR NORTHEAST PLAINS OF COLORADO WITH LARGE HAIL AND DAMAGING WINDS. ELSEWHERE THE STORMS MAY PRODUCE SMALL HAIL ALONG WITH WIND GUSTS TO 50 MPH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY DRY CONDITIONS WILL PREVAIL ACROSS THE FORECAST AREA THURSDAY AND FRIDAY AS AN UPPER LEVEL RIDGE BUILDS ACROSS THE REGION. WEAK UPPER RIDGING IS EXPECTED TO PERSIST FROM SATURDAY THROUGH TUESDAY WITH A SLIGHTLY WARMER AIRMASS BUT A GRADUAL INCREASE IN MOISTURE. THIS WILL LEAD TO A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS... MAINLY OVER THE MOUNTAINS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
In the hours before
Special weather statement, Jun 18, 5:47 PM MDT, 46 minutes before
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SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 603 PM MDT WED JUN 18 2014 COZ039-040-043-190030- CENTRAL AND SOUTH WELD COUNTY CO- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY CO- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY CO- 603 PM MDT WED JUN 18 2014 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN BOULDER...SOUTHWESTERN WELD...EASTERN BROOMFIELD...NORTHEASTERN JEFFERSON...NORTHWESTERN DENVER AND NORTHWESTERN ADAMS COUNTIES UNTIL 630 PM MDT... AT 602 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER SOUTHEASTERN WESTMINSTER...OR 10 MILES NORTH OF DENVER...MOVING NORTHEAST AT 25 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... THORNTON...EASTERN ARVADA...WESTMINSTER...BROOMFIELD...NORTHGLENN... LAFAYETTE...ERIE...FEDERAL HEIGHTS AND DACONO. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR SUDDEN GUSTY WINDS. SECURE LOOSE OBJECTS AND MOVE TO A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. THIS STORM MAY INTENSIFY...SO 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. && LAT...LON 3981 10502 3985 10511 4006 10507 4005 10484 TIME...MOT...LOC 0002Z 205DEG 21KT 3987 10504 BAKER
Special weather statement, Jun 18, 6:28 PM MDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
628 PM MDT WED JUN 18 2014
COZ039-040-190100-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY
CO-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE
COUNTIES/EAST BROOMFIELD COUNTY CO-
628 PM MDT WED JUN 18 2014
...SIGNIFICANT WEATHER ADVISORY FOR WESTERN ARAPAHOE...NORTHERN
DOUGLAS...NORTHEASTERN JEFFERSON...SOUTHWESTERN DENVER AND
SOUTHWESTERN ADAMS COUNTIES UNTIL 700 PM MDT...
AT 624 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
ENGLEWOOD...OR 6 MILES SOUTH OF DENVER...MOVING NORTHEAST AT 25 MPH.
DIME SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.
WEATHER SPOTTERS IN LITTLETON AND SHERIDAN HAVE REPORTED PEA SIZE
HAIL...BRIEF HEAVY RAIN AAS WEEL AS SOME ROTATION WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
DENVER...WESTERN AURORA...LAKEWOOD...SOUTHEASTERN ARVADA...
SOUTHWESTERN CENTENNIAL...NORTHERN HIGHLANDS RANCH...SOUTHWESTERN
COMMERCE CITY...LITTLETON...ENGLEWOOD...WHEAT RIDGE...EASTERN
GOLDEN...GREENWOOD VILLAGE...SHERIDAN AND MORRISON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
MINOR STREET FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO OCCURRING WITH THIS
STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK
A SAFE SHELTER INSIDE A BUILDING OR VEHICLE.
THIS STORM MAY INTENSIFY...SO 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.
&&
LAT...LON 3962 10516 3964 10518 3968 10519 3969 10514
3971 10515 3972 10518 3984 10512 3977 10481
3956 10494
TIME...MOT...LOC 0024Z 205DEG 21KT 3964 10497
BAKERSpecial weather statement, Jun 18, 6:33 PM MDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 633 PM MDT WED JUN 18 2014 COZ040-043-190100- CENTRAL AND SOUTH WELD COUNTY CO- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY CO- 633 PM MDT WED JUN 18 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WELD...NORTHEASTERN DENVER AND NORTHWESTERN ADAMS COUNTIES UNTIL 700 PM MDT... AT 630 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR BRIGHTON...OR 19 MILES NORTH OF DENVER...MOVING NORTHEAST AT 30 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. AT 625 PM MDT...TRAINED WEATHER SPOTTERS REPORTED HEAVY RAINFALL CAUSING MINOR STREET FLOODING ACROSS NORTHERN THORNTON AND EASTERN WESTMINSTER NEAR THE INTERSECTION OF I-25 AND 120TH AVENUE. LOCATIONS IMPACTED INCLUDE... NORTHERN THORNTON...NORTHEASTERN WESTMINSTER...NORTHEASTERN BROOMFIELD...NORTHEASTERN COMMERCE CITY...BRIGHTON...FIRESTONE... FREDERICK...FORT LUPTON...LOCHBUIE...DACONO...HUDSON AND BARR LAKE. PRECAUTIONARY/PREPAREDNESS ACTIONS... PREPARE FOR SUDDEN GUSTY WINDS. SECURE LOOSE OBJECTS AND MOVE TO A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO MINOR STREET FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. FREQUENT CLOUD TO GROUND LIGHTNING IS ALSO OCCURRING WITH THIS STORM. LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE SHELTER INSIDE A BUILDING OR VEHICLE. THIS STORM MAY INTENSIFY...SO 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. && LAT...LON 3988 10475 3996 10500 4019 10494 4010 10463 TIME...MOT...LOC 0030Z 213DEG 27KT 4000 10485 BAKER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 6:03 PM MDT | Special Weather Statement | BOU | Broomfield | 27 min |
| Jun 18, 6:28 PM MDT | Special Weather Statement | BOU | Denver | 32 min |
| Jun 18, 6:57 PM MDT | Special Weather Statement | BOU | Broomfield, Denver | 33 min |
| Jun 18, 7:06 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 24 min |
| Jun 18, 7:18 PM MDT | Severe Thunderstorm Warning | BOU | Morgan | 42 min |
| Jun 18, 7:29 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Washington | 46 min |
| Jun 18, 7:33 PM MDT | Special Weather Statement | BOU | Adams | 27 min |
| Jun 18, 7:41 PM MDT | Tornado Warning | BOU | Logan, Washington | 34 min |
| Jun 18, 8:00 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Washington | 30 min |
| Jun 18, 8:10 PM MDT | Tornado Warning | BOU | Logan, Phillips | 50 min |
| Jun 18, 8:17 PM MDT | Tornado Warning | BOU | Washington | 28 min |
| Jun 18, 8:40 PM MDT | Tornado Warning | BOU | Washington | 35 min |
| Jun 18, 8:48 PM MDT | Tornado Warning | BOU | Logan, Phillips, Sedgwick | 27 min |
| Jun 18, 9:10 PM MDT | Tornado Warning | BOU | Phillips, Sedgwick | 35 min |
Nearby
Special Weather Statements in Colorado, 2014Every special weather statement in 2014
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.