Alert archive / Colorado / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 170, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 4, 2014, 2:15 PM MDT for Weld County, Colorado. It was in force for 30 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 4, 2014, 2:15 PM MDT (20:15 UTC)
- Expired
- Jul 4, 2014, 2:45 PM MDT
- In force
- 30 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
County Weld County, CO
The radar
The Cheyenne radar (KCYS), 67 km from the middle of the area, began a volume at 20:19 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 8.3 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
- 4 J/kg
- Mixed-layer CIN
- -445 J/kg
- Mixed-layer LCL
- 2844 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -21 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
954
WUUS55 KBOU 042015
SVRBOU
COC123-042045-
/O.NEW.KBOU.SV.W.0170.140704T2015Z-140704T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
215 PM MDT FRI JUL 4 2014
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN WELD COUNTY IN NORTHEAST COLORADO...
* UNTIL 245 PM MDT
* AT 215 PM MDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES NORTHEAST
OF GROVER...OR 33 MILES SOUTHWEST OF KIMBALL...MOVING EAST AT 10
MPH.
HAZARD...QUARTER SIZE HAIL.
SOURCE...RADAR INDICATED.
IMPACT...DAMAGE TO VEHICLES IS EXPECTED.
* LOCATIONS IMPACTED INCLUDE...
GROVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.
LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.
&&
LAT...LON 4082 10384 4085 10425 4087 10427 4099 10428
4100 10428 4100 10375
TIME...MOT...LOC 2015Z 269DEG 8KT 4092 10416
HAIL...1.00IN
WIND...<50MPH
$$
BAKER1 follow-up statement
641
WWUS55 KBOU 042042
SVSBOU
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
242 PM MDT FRI JUL 4 2014
COC123-042052-
/O.EXP.KBOU.SV.W.0170.000000T0000Z-140704T2045Z/
WELD CO-
242 PM MDT FRI JUL 4 2014
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WELD COUNTY WILL
EXPIRE AT 245 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING WILL BE ALLOWED TO
EXPIRE.
LAT...LON 4082 10384 4085 10425 4087 10427 4099 10428
4100 10428 4100 10375
TIME...MOT...LOC 2040Z 269DEG 8KT 4092 10416
$$
BAKERWhat 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 Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 11:58 AM MDT, 2 hours 17 minutes earlier.
Area forecast discussion, Jul 4, 11:58 AM MDT, 2 hours 17 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1158 AM MDT FRI JUL 4 2014 .UPDATE... ISSUED AT 1156 AM MDT FRI JUL 4 2014 ELEVATED MOISTURE BAND MOVING OVER THE FRONT RANGE NOW...A LITTLE EARLIER THAN WOULD BE OPTIMAL TO HELP CONVECTION. PREVIOUS FORECAST LOOKING PRETTY GOOD...IT MAY EVEN BE A BIT TOO WET. WEAK CONVECTION SHOULD BLOSSOM IN THE CLOUD BAND OVER THE NEXT COUPLE OF HOURS...BUT IN A CLOUDY AND FAIRLY DRY AIR MASS. OUTFLOW WINDS SHOULD FORCE CONVERGENCE EASTWARD...WITH SLIGHTLY DRIER/COOLER AIR LEFT BEHIND ALONG THE FRONT RANGE. STILL COULD BE ANOTHER BATCH OF WEAK CONVECTION LATER IN THE DAY...BUT EXPECT THAT TO BE EVEN WEAKER THAN THE EARLY AFTERNOON SHOWERS. MODELS HAVE BEEN BLOWING UP STORMS ON THE DEVELOPING DRYLINE JUST EAST OF STERLING...AKRON AND LIMON BY MID AFTERNOON AND THAT CONVECTION COULD BE STRONGER. HOWEVER THE EDGE OF THE MOIST AIR HAS MIXED OUT PRETTY WELL...SO EXPECT THAT SEVERE THREAT MAY JUST BE LIMITED TO SEDGWICK AND PHILLIPS COUNTIES AT MID AFTERNOON. AND THAT JUST FOR MARGINAL PULSE HAIL EVENTS. ALL THIS PRETTY WELL COVERED...WILL LEAVE THE SCATTERED POPS WHERE WE HAVE THEM BUT EXPECT LOW INTENSITY AND RELATIVELY EARLY TIMING. TEMPERATURES LOOK TO BE PLAYING OUT PRETTY WELL...COULD WIND UP GETTING SLIGHTLY WARMER BEHIND THIS ROUND OF CONVECTION BY THE END OF THE DAY. && .SHORT TERM...(TODAY THROUGH TONIGHT ) ISSUED AT 343 AM MDT FRI JUL 4 2014 UPPER LEVEL HIGH WILL REMAIN CENTERED NEAR THE FOUR CORNERS TODAY...WITH A SLIGHT UPPER LEVEL SPEED MAX MOVING OVER THE TOP OF THE RIDGE AND SOUTHERN WYOMING LATER TODAY. MEANWHILE... PRECIPITABLE WATER VALUES HAVE INCREASED ACROSS WESTERN COLORADO OVER THE LAST 24 HOURS WITH VALUES NOW NEAR 0.80 INCH AT GRAND JUNCTION. THE COMBINATION OF THE PASSING UPPER LEVEL SPEED MAX TO OUR NORTH AND INCREASED PW ON THE WESTERN SLOPE SHOULD PRODUCE BETTER STORM COVERAGE THIS AFTERNOON INTO THE EVENING. HOWEVER...THE STORMS WILL STILL BE HIGH BASED PRODUCING STRONG AND GUSTY OUTFLOW WINDS AND PERHAPS BRIEF HEAVY RAIN/SMALL HAIL FROM THE STRONGER STORMS. THREAT OF ANY SEVERE STORMS WOULD BE QUITE LOW AS BETTER LOW LEVEL MOISTURE THAT HELPED SPARKED YESTERDAYS STRONGER STORMS WILL SCOUR EASTWARD MOSTLY INTO NEBRASKA AND KANSAS. FAR NORTHEAST CORNER COULD SEE BETTER MOISTURE AND INSTABILITY HOLD ON THERE. HIGH TEMPERATURES WILL AVERAGE A COUPLE DEGREES WARMER THAN YESTERDAY...BUT SOME COOLING SHOULD BE NOTED BY LATE IN THE DAY WITH OUTFLOW FROM SHOWERS/STORMS. STORMS SHOULD BE ENDING FOR THE MOST PART FOR EVENING FIREWORKS DISPLAYS...BUT STILL CANT RULE OUT SOME GUSTY WINDS/SPRINKLES LINGERING TIL AROUND 9-10 PM. MOST CONVECTION BY THAT TIME SHOULD BE PUSHING TO THE FAR EASTERN PLAINS. .LONG TERM...(SATURDAY THROUGH THURSDAY) ISSUED AT 343 AM MDT FRI JUL 4 2014 THE LARGE UPPER HIGH NEAR THE FOUR CORNERS WILL BE MOVING SLIGHTLY NORTH SATURDAY WITH WARMER AIR ADVECTING INTO THE STATE. TEMPERATURES ARE EXPECTED TO BE A COUPLE DEGREES WARMER OVER TODAYS READINGS. FLOW ALOFT WILL BE TURNING MORE NORTHERLY WHICH WILL PUSH THE SUBTROPICAL MOISTURE AND UPPER HIGH AWAY FROM NORTHEAST COLORADO. WARMER TEMPERATURES COMBINED WITH WHAT IS LEFT OF THE MIDLEVEL MOISTURE WILL KEEP ISOLATED HIGH BASED CONVECTION TO THE HIGH TERRAIN. WE MAY SEE SOME ACTIVITY OUT ON THE PLAINS BUT NOT ENOUGH COVERAGE TO MENTION IN THE FORECAST. IF THEY DO FORM OVER THE PLAINS...WILL LIKELY ONLY EXPERIENCE VIRGA AND GUSTY OUTFLOW WINDS. SATURDAY NIGHT WILL BE ANOTHER MILD NIGHT WITH BREEZY WESTERLY WINDS OUT OF THE MOUNTAINS INTO THE PLAINS DUE TO THE SURFACE TROUGH ON THE PLAINS. ANOTHER DISTURBANCE WILL BEGIN TO PUSH DOWN FROM THE NORTH ON SUNDAY...BUT THE TIMING MAY NOT BE QUICK ENOUGH TO COOL US DOWN MUCH. LOOK FOR TEMPERATURES TO BE SIMILAR TO SATURDAYS WITH EVEN LESS MOISTURE TO WORK WITH. EXPECT LIMITED HIGH BASED CONVECTION OVER THE HIGH TERRAIN. THE COOL FRONT WILL LIKELY SLIDE DOWN SUNDAY AFTERNOON OR EVENING WITH UPSLOPE FLOW OVERNIGHT. AIRMASS LOOKS TOO DRY FOR ANY MOISTURE TO COME OUT OF IT UNTIL MONDAY. MOISTURE FROM THE NORTHERN SHORTWAVE WILL INCREASE OVER THE AREA MONDAY THROUGH WEDNESDAY AS WELL AS COOL TEMPERATURES SLIGHTLY...BACK TO NEAR NORMAL FOR THIS TIME OF YEAR. LOOK FOR MORE WIDESPREAD SHOWERS AND THUNDERSTORMS EACH AFTERNOON AND EVENING...WITH SOME ACTIVITY TO LAST THROUGH THE NIGHT. MODELS ARE THEN SHOWING THE UPPER RIDGE TO BUILD BACK EAST OVER THE STATE TO BRING WARMER AND SLIGHTLY DRIER WEATHER THROUGH THE WEEKEND. && .AVIATION...(FOR THE TAFS THROUGH 18Z SATURDAY MORNING) ISSUED AT 1156 AM MDT FRI JUL 4 2014 VFR THROUGH TONIGHT. EXPECTING SCATTERED WEAK THUNDERSTORMS AROUND THE DENVER AREA AROUND THE MIDDLE OF THE AFTERNOON...THEN ONLY A SLIGHT CHANCE AFTER THAT. MAIN THREAT WILL BE GUSTY WINDS WITH A WIND SHIFT OR TWO LIKELY. PEAK SPEED AROUND 25 KNOTS LIKELY WITH UP TO 35 KNOTS POSSIBLE...AGAIN MOST LIKELY AROUND 21Z WITH A LOWER THREAT BY 00Z. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && UPDATE...GIMMESTAD SHORT TERM...BARJENBRUCH LONG TERM...KRIEDERMAN AVIATION...GIMMESTAD
Hazardous weather outlook, Jul 4, 11:15 AM MDT, 3 hours before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1115 AM MDT FRI JUL 4 2014 COZ030>051-051715- 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- 1115 AM MDT FRI JUL 4 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON. LOW LEVEL MOISTURE AND INSTABILITY WILL BE DECREASING IN MOST AREAS...SO THE MAJORITY OF STORMS WILL PRODUCE STRONG AND GUSTY OUTFLOW WINDS AND ONLY BRIEF HEAVY RAIN. THE FAR NORTHEAST CORNER OF THE STATE COULD STILL SEE A LOW RISK OF A SEVERE STORM WHERE SOMEWHAT BETTER LOW LEVEL MOISTURE WILL HOLD IN PLACE. HIGH TEMPERATURES WILL WARM INTO THE LOWER AND MID 90S ON THE PLAINS...WITH MOSTLY UPPER 70S AND 80S IN THE MOUNTAINS. STORMS ARE EXPECTED TO DECREASE BY MID TO LATE EVENING WITH ONLY ISOLATED SHOWERS AND GUSTY WINDS LINGERING TIL SHORTLY AFTER DARK. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY HIGH BASED CONVECTION WILL MOSTLY BE LIMITED TO THE HIGH TERRAIN SATURDAY AND SUNDAY...WITH TEMPERATURES UP TO 10 DEGREES WARMER THAN AVERAGE FOR THE FORECAST AREA. STORMS WILL LIKELY PRODUCE GUSTY WINDS NEAR 40 MPH WITH BRIEF LIGHT RAIN. MOISTURE AND COOLER TEMPERATURES ARE THEN EXPECTED MONDAY THROUGH WEDNESDAY WITH A RETURN OF AFTERNOON AND EVENING THUNDERSTORMS WITH MORE MOISTURE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. GIMMESTAD/COOPER
In the hours before
Special weather statement, Jul 4, 1:31 PM MDT, 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
131 PM MDT FRI JUL 4 2014
COZ039-040-042000-
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-
131 PM MDT FRI JUL 4 2014
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN BROOMFIELD...NORTHEASTERN
JEFFERSON...NORTHWESTERN DENVER AND WEST CENTRAL ADAMS COUNTIES UNTIL
200 PM MDT...
AT 130 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
ARVADA...OR 11 MILES NORTHWEST OF DENVER...MOVING EAST AT 20 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
SOUTHWESTERN THORNTON...ARVADA...WESTMINSTER...SOUTHWESTERN
BROOMFIELD...NORTHGLENN AND FEDERAL HEIGHTS.
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 3993 10497 3979 10496 3980 10519 3985 10521
3988 10519
TIME...MOT...LOC 1930Z 268DEG 18KT 3984 10513
BAKERSpecial weather statement, Jul 4, 1:37 PM MDT, 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
137 PM MDT FRI JUL 4 2014
COZ036-042000-
JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR
CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET CO-
137 PM MDT FRI JUL 4 2014
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DOUGLAS COUNTY UNTIL
200 PM MDT...
AT 136 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
DEVILS HEAD...OR 30 MILES NORTHWEST OF COLORADO SPRINGS...MOVING EAST
AT 20 MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
DEVILS HEAD...PERRY PARK AND WESTCREEK.
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 3914 10522 3930 10520 3932 10498 3927 10495
3922 10496 3920 10493 3919 10493 3913 10499
TIME...MOT...LOC 1936Z 269DEG 19KT 3921 10511
BAKERSpecial weather statement, Jul 4, 1:47 PM MDT, 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 147 PM MDT FRI JUL 4 2014 COZ039-040-042015- 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- 147 PM MDT FRI JUL 4 2014 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN BROOMFIELD... NORTHEASTERN JEFFERSON...CENTRAL DENVER AND SOUTHWESTERN ADAMS COUNTIES UNTIL 215 PM MDT... AT 145 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER EASTERN ARVADA...OR 8 MILES NORTHWEST OF DENVER...MOVING EAST AT 20 MPH. HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH ARE LIKELY WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... NORTHWESTERN DENVER...THORNTON...ARVADA...WESTMINSTER...SOUTHWESTERN BROOMFIELD...COMMERCE CITY...NORTHGLENN...BRIGHTON...NORTHERN WHEAT RIDGE AND FEDERAL HEIGHTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS. RAIN GAUGES UNDER THIS STORM HAVE RECORDED UP TO A QUARTER INCH OF RAIN IN 15 MINUTES. 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 3978 10515 3990 10516 3994 10483 3976 10483 TIME...MOT...LOC 1945Z 269DEG 18KT 3982 10507 BAKER
Special weather statement, Jul 4, 2:07 PM MDT, 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
207 PM MDT FRI JUL 4 2014
COZ039-040-042045-
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-
207 PM MDT FRI JUL 4 2014
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN BOULDER...EASTERN
BROOMFIELD...NORTHEASTERN JEFFERSON...NORTHWESTERN DENVER AND
NORTHWESTERN ADAMS COUNTIES UNTIL 245 PM MDT...
AT 204 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
WESTMINSTER...OR 12 MILES NORTHWEST OF DENVER...MOVING EAST AT 10
MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
THIS STORM WAS ALSO PRODUCING HEAVY RAINFALL RESULTING IN MINOR
STREET FLOODING. AT 2 PM MDT...A NATIONAL WEATHER SERVICE EMPLOYEE
NEAR STANLEY RESERVOIR IN NORTH ARVADA REPORTED 0.8 INCH OF RAIN IN
30 MINUTES.
LOCATIONS IMPACTED INCLUDE...
NORTHERN DENVER...THORNTON...SOUTHEASTERN ARVADA...WESTMINSTER...
BROOMFIELD...COMMERCE CITY...NORTHGLENN...BRIGHTON...EASTERN WHEAT
RIDGE...LAFAYETTE...FEDERAL HEIGHTS AND SOUTHWESTERN DENVER
INTERNATIONAL AIRPORT.
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 FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.
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 3988 10513 3999 10507 3999 10480 3989 10476
3977 10480 3977 10509
TIME...MOT...LOC 2004Z 269DEG 9KT 3989 10508
BAKERSpecial weather statement, Jul 4, 2:11 PM MDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
211 PM MDT FRI JUL 4 2014
COZ042-042100-
NORTHEAST WELD COUNTY CO-
211 PM MDT FRI JUL 4 2014
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WELD COUNTY UNTIL
300 PM MDT...
AT 210 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 4
MILES NORTHEAST OF GROVER...OR 34 MILES SOUTHWEST OF KIMBALL...MOVING
EAST AT 10 MPH.
HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
GROVER.
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 4082 10384 4085 10425 4087 10427 4099 10428
4100 10428 4100 10375
TIME...MOT...LOC 2010Z 269DEG 8KT 4092 10417
BAKERThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 6:00 PM MDT | Special Weather Statement | BOU | Jefferson | 45 min |
| Jul 3, 6:23 PM MDT | Severe Thunderstorm Warning | BOU | Jefferson | 21 min |
| Jul 3, 6:29 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 31 min |
| Jul 3, 6:50 PM MDT | Special Weather Statement | BOU | Crowley | 25 min |
| Jul 3, 6:59 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 31 min |
| Jul 3, 7:10 PM MDT | Special Weather Statement | BOU | Douglas | 35 min |
| Jul 3, 7:15 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 30 min |
| Jul 3, 7:48 PM MDT | Special Weather Statement | BOU | Gilpin | 27 min |
| Jul 3, 8:04 PM MDT | Special Weather Statement | BOU | Lincoln | 26 min |
| Jul 3, 8:17 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 43 min |
| Jul 3, 8:28 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 32 min |
| Jul 4, 1:31 PM MDT | Special Weather Statement | BOU | Broomfield | 29 min |
| Jul 4, 1:37 PM MDT | Special Weather Statement | BOU | Douglas | 23 min |
| Jul 4, 1:47 PM MDT | Special Weather Statement | BOU | Broomfield | 28 min |
| Jul 4, 2:07 PM MDT | Special Weather Statement | BOU | Broomfield | 38 min |
| Jul 4, 2:32 PM MDT | Special Weather Statement | BOU | Sedgwick | 43 min |
| Jul 4, 2:47 PM MDT | Severe Thunderstorm Warning | BOU | Sedgwick | 18 min |
| Jul 4, 2:59 PM MDT | Special Weather Statement | BOU | Boulder | 46 min |
| Jul 4, 3:37 PM MDT | Special Weather Statement | BOU | Logan | 38 min |
| Jul 4, 3:48 PM MDT | Special Weather Statement | BOU | Sedgwick | 42 min |
| Jul 4, 4:11 PM MDT | Special Weather Statement | BOU | Logan | 34 min |
| Jul 4, 4:54 PM MDT | Special Weather Statement | BOU | Jefferson | 21 min |
| Jul 4, 4:55 PM MDT | Areal Flood Advisory | BOU | Phillips | 95 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2014Every severe thunderstorm warning 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.