Alert archive / Colorado / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 227, NWS Denver/Boulder, CO

July 30, 2016Morgan County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 30, 2016, 12:02 AM MDT for Morgan County, Weld County, Colorado. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 30, 2016, 12:02 AM MDT (06:02 UTC)
Expired: Jul 30, 2016, 12:45 AM MDT
In force: 43 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Morgan County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 49 km from the middle of the area, began a volume at 06:05 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

Time	Report	Where	Remark
Jul 30, 12:23 AM MDT	HAIL 1.25	Roggen, CO

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 21 minutes after it went out.

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 00:00Z, 6.0 hours before the alert went out and 87 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 305 J/kg
Mixed-layer CIN: -114 J/kg
Mixed-layer LCL: 2718 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

999 
WUUS55 KBOU 300602
SVRBOU
COC087-123-300645-
/O.NEW.KBOU.SV.W.0227.160730T0602Z-160730T0645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
1202 AM MDT SAT JUL 30 2016

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL WELD COUNTY IN NORTHEASTERN COLORADO...
  SOUTHWESTERN MORGAN COUNTY IN NORTHEASTERN COLORADO...

* UNTIL 1245 AM MDT

* AT 1201 AM MDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR ROGGEN...OR
  27 MILES SOUTHEAST OF GREELEY...MOVING SOUTHEAST AT 15 MPH.

  HAZARD...GOLF BALL SIZE HAIL AND 60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...PEOPLE AND ANIMALS OUTDOORS WILL BE INJURED. EXPECT HAIL 
           DAMAGE TO ROOFS...SIDING...WINDOWS...AND VEHICLES. EXPECT 
           WIND DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  PROSPECT VALLEY...ROGGEN AND HOYT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS!

&&

LAT...LON 4016 10396 4000 10405 4000 10436 4015 10448
      4030 10433
TIME...MOT...LOC 0601Z 310DEG 12KT 4019 10433 

HAIL...1.75IN
WIND...60MPH
 
$$

GIMMESTAD

2 follow-up statements

852 
WWUS55 KBOU 300628
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1228 AM MDT SAT JUL 30 2016

COC087-123-300645-
/O.CON.KBOU.SV.W.0227.000000T0000Z-160730T0645Z/
WELD CO-MORGAN CO-
1228 AM MDT SAT JUL 30 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM MDT
FOR SOUTH CENTRAL WELD AND SOUTHWESTERN MORGAN COUNTIES...

AT 1227 AM MDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES EAST OF
ROGGEN...OR 25 MILES WEST OF FORT MORGAN...MOVING SOUTHEAST AT 15
MPH.

HAZARD...60 MPH WIND GUSTS AND HALF DOLLAR SIZE HAIL. 

SOURCE...TRAINED WEATHER SPOTTERS REPORTED HALF DOLLAR SIZE HAIL
         IN ROGGEN AT 1222 AM. 

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO 
         ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
HOYT AND ROGGEN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

HEAVY RAINFALL IS OCCURRING WITH THIS STORM. DO NOT DRIVE YOUR
VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4016 10396 4000 10405 4000 10436 4015 10441
      4024 10422
TIME...MOT...LOC 0627Z 310DEG 12KT 4013 10424 

HAIL...1.25IN
WIND...60MPH
 
$$

GIMMESTAD

048 
WWUS55 KBOU 300643
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1243 AM MDT SAT JUL 30 2016

COC087-123-300653-
/O.EXP.KBOU.SV.W.0227.000000T0000Z-160730T0645Z/
WELD CO-MORGAN CO-
1243 AM MDT SAT JUL 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL WELD AND
SOUTHWESTERN MORGAN COUNTIES WILL EXPIRE AT 1245 AM MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4016 10396 4000 10405 4000 10436 4015 10441
      4024 10422
TIME...MOT...LOC 0641Z 310DEG 12KT 4013 10424 

$$

GIMMESTAD

What 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 29, 8:10 PM MDT, 3 hours 52 minutes earlier.

Area forecast discussion, Jul 29, 8:10 PM MDT, 3 hours 52 minutes before

Area Forecast Discussion
National Weather Service Denver/Boulder CO
810 PM MDT FRI JUL 29 2016

.UPDATE...
Issued at 806 PM MDT Fri Jul 29 2016

Long lived Supercell was tracking across srn Weld County. Hi res
data indicates this storm may continue for 2 to 3 more hours.
There is still alot of instabtility across the area so we shall
see if more storms eventually dvlp like latest HRRR shows. With
favorable shear svr potential may continue well past 10 pm.

&&

.SHORT TERM...(This evening through Saturday)
Issued at 303 PM MDT Fri Jul 29 2016

Dewpoints have remained high across the plains and temperatures
have slowly warmed however storms so far that have attempted to
move off the higher terrain of Larimer and Boulder Counties and
the Cheyenne Ridge have weakened and died when they hit the
plains. An experimental sounding launched at 21z by the CSU Atmos
Dept still shows a well defined stable layer just below 700 mb so
this agrees with the storm trend so far. Storms have increased
recently north of CYS and across western NE ahead of a weak upper
level shortwave seen in the water vapor imagery. Meanwhile at the
surface there is a Denver Cyclone in place and while the
associated convergence zone does not look that strong there is
some gathering of towering cumulus near and south of DIA so
potentially this could still be an initiation area for storms. But
still looks like we will never overcome the convective inhibition
on the plains so will need to rely on storms moving into the area.
The NCEP HRRRs remain fairly consistent with bringing storms off
the Cheyenne Ridge southward across the eastern plains this
evening with a trend to be a little later in doing this so have so
upscale growth and storms after midnight. Meanwhile the 18z 4km
NAM still kills any storms moving off the Cheyenne Ridge with
nothing on the plains this evening. We are seeing a collection of
strong storms just north and nw of CYS right now and maybe these
will be the ones that make it south over the next few hours. Given
the moisture and shear should the storms survive there certainly
is the chance they could be severe and supercellular with large
hail and strong winds the main threat...but it remains a tricky
forecast for sure.

Tomorrow all models are drier even though dewpoints do remain
fairly high. Moisture though should be shallower and the cap will
be strong, but temperatures will be higher still than today so
kept a minimal chance of late day storms in most areas.

.LONG TERM...(Saturday night through Friday)
Issued at 303 PM MDT Fri Jul 29 2016

Broad upper level ridge extending eastward from srn
California to the lower Mississippi River valley is forecast to
meander back and forth during the extending period of the forecast.
Shifts in the ridge will allow northward intrusions of subtropical
moisture up over the Four corners region starting late on Sunday.
Models show a steady rise in deep layer PW/specific humidity values
prior to the passage of a mid-level shortwave trough forecast to
propagate slowly across Colorado Sunday afternoon/evening. Moisture
peaks over the forecast area that evening and with light transport
winds...potential exits for isolated/widely scattered storms capable
of rainfall amounts of quarter to half inch in under 30 minutes.
Hail also possible...mainly on the plains during the evening
hours...although the threat over severe hail appears low. Shortwave
is progged to move east of the CWA on Monday taking with it the
plume of monsoonal subtropical moisture. But lingering low level
moisture and solar heating should have little trouble generating
isolated to widely scattered t-storms over and near the Front Range
mtns by late afternoon. By evening could see a few storms drift out
over the plains with light swly flow aloft where most if not all of
this convection should dissipate by midnight.

For the remainder of the week...models show the upper ridge centered
over the southern Great Plains where it strengthen and amplifies
northward over the upper Midwest. In doing so...south-southwesterly
monsoonal flow re-establishes over the Desert Southwest which then
drives another well organized plume of subtropical moisture up over
Colorado. By Thursday PW values surge well over an inch over western
Colorado. Models also show a weak disturbance embedded in this flow
providing additional lift and instability for a good chance of  the
showers and t-storms over the western valleys and high country
areas of Colorado. It's probably not until evening when the northeast
plains may join in on the storm activity with the arrival of a
fairly strong cold front and the development of a moist upslope
flow. GFS is cranking out pretty high qpf values along the Front
range and over the Palmer Divide for the evening. Certainly too
early to have much confidence in this forecast...but something to
watch develop in future model runs.  Friday could be just as active
should moisture linger and upslope flow continue. Otherwise Friday
looks cooler with plains temperatures possibly as much as 8-10
degs F below average for the date.

&&

.AVIATION...(For the 00Z TAFS through 00Z Saturday evening)
Issued at 806 PM MDT Fri Jul 29 2016

Outflow fm srn Weld storm may switch winds to a more NNE direction
for an hour or so. Could see a few storms dvlp behind this bndry
during the next 1 to 2 hours.

&&

.BOU Watches/Warnings/Advisories...
None.
&&

UPDATE...RPK
SHORT TERM...Szoke
LONG TERM...Baker
AVIATION...RPK

Hazardous weather outlook, Jul 29, 10:55 AM MDT, 13 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
1055 AM MDT FRI JUL 29 2016

COZ030>051-300500-
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-
1055 AM MDT FRI JUL 29 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP LATER THIS
AFTERNOON OVER HIGHER TERRAIN AND THESE MAY MOVE ACROSS THE
PLAINS INTO THIS EVENING. SOME OF THE STORMS ON THE PLAINS WILL
LIKELY BE SEVERE. THE PRIMARY THREAT AGAIN TODAY IS VERY LARGE
HAIL...WITH UP TO BASEBALL SIZE HAIL POSSIBLE WITH THE STRONGEST
STORMS. DAMAGING WIND GUSTS UP TO 80 MPH AND AN ISOLATED TORNADO
OR TWO ARE ALSO POSSIBLE.

THE AIRMASS REMAINS QUITE UNSTABLE WITH SUFFICIENT WIND SHEAR FOR
STRONG TO SEVERE THUNDERSTORMS. THE THREAT WILL BE GREATEST IN THE
LATE AFTERNOON AND EARLY EVENING HOURS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

SATURDAY WILL BE A DRIER DAY WITH JUST A SLIGHT CHANCE OF LATE
DAY THUNDERSTORMS MAINLY OVER THE MOUNTAINS. A RETURN TO A MOIST
SOUTHERLY FLOW TOGETHER WITH THE PASSAGE OF A SLOW MOVING UPPER
LEVEL TROUGH WILL INCREASE THE CHANCE OF SHOWERS AND THUNDERSTORMS
ACROSS THE OUTLOOK AREA ON SUNDAY AND MONDAY. SLOW MOVING LATE
DAY STORMS COULD PRODUCE LOCALLY HEAVY RAINFALL. STORM CHANCES
SHOULD THEN DIMINISH TUESDAY AND BEYOND WITH ONLY A SLIGHT CHANCE
OF AFTERNOON AND EVENING STORMS MAINLY OVER THE HIGH COUNTRY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER 3 PM.

SZOKE/BAKER

In the hours before

Local storm report, Jul 29, 8:58 PM MDT, 3 hours 4 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
858 PM MDT FRI JUL 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 PM     HAIL             1 SSW FORT LUPTON       40.07N 104.81W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             NW PIERCE               40.63N 104.75W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0735 PM     HAIL             2 ESE MILTON RESERVOIR  40.23N 104.60W
07/29/2016  M2.50 INCH       WELD               CO   TRAINED SPOTTER

0726 PM     HAIL             2 NE MILTON RESERVOIR   40.26N 104.60W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0725 PM     HAIL             1 E GREELEY             40.42N 104.72W
07/29/2016  M1.00 INCH       WELD               CO   TRAINED SPOTTER

0720 PM     TSTM WND DMG     GREELEY                 40.42N 104.74W
07/29/2016                   WELD               CO   NWS EMPLOYEE

            LARGE TREE LIMB DOWN ON UNC GREELEY. POWER LINES DOWN IN
            NE GREELEY.

0715 PM     HAIL             2 ENE GREELEY           40.43N 104.72W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0715 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  E2.50 INCH       WELD               CO   TRAINED SPOTTER

            DAMAGED CAR WINDOWS

0713 PM     HAIL             2 ENE GREELEY           40.43N 104.71W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            AT THE GREELEY AIRPORT

0705 PM     HAIL             3 N GREELEY             40.46N 104.74W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0656 PM     HAIL             AULT                    40.58N 104.73W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             EATON                   40.52N 104.71W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  M1.25 INCH       WELD               CO   TRAINED SPOTTER

0651 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            SECOND ROUND OF GOLFBALL SIZED TONIGHT

0637 PM     HAIL             4 E PIERCE              40.64N 104.68W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0628 PM     HAIL             4 W CARR                40.90N 104.95W
07/29/2016  M1.00 INCH       LARIMER            CO   TRAINED SPOTTER

0626 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             S CARR                  40.90N 104.87W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0535 PM     HAIL             7 SE CARR               40.83N 104.78W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0533 PM     HAIL             NATURAL FORT REST AREA  40.96N 104.92W
07/29/2016  M2.00 INCH       WELD               CO   BROADCAST MEDIA

&&

NGUSACK

Local storm report, Jul 29, 9:01 PM MDT, 3 hours 1 minute before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
901 PM MDT FRI JUL 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 PM     HAIL             1 NE FORT LUPTON        40.10N 104.79W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0845 PM     HAIL             1 SSW FORT LUPTON       40.07N 104.81W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             2 ESE MILTON RESERVOIR  40.23N 104.60W
07/29/2016  M2.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             NW PIERCE               40.63N 104.75W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0726 PM     HAIL             2 NE MILTON RESERVOIR   40.26N 104.60W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0725 PM     HAIL             1 E GREELEY             40.42N 104.72W
07/29/2016  M1.00 INCH       WELD               CO   TRAINED SPOTTER

0720 PM     TSTM WND DMG     GREELEY                 40.42N 104.74W
07/29/2016                   WELD               CO   NWS EMPLOYEE

            LARGE TREE LIMB DOWN ON UNC GREELEY. POWER LINES DOWN IN
            NE GREELEY.

0715 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  E2.50 INCH       WELD               CO   TRAINED SPOTTER

            DAMAGED CAR WINDOWS

0715 PM     HAIL             2 ENE GREELEY           40.43N 104.72W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0713 PM     HAIL             2 ENE GREELEY           40.43N 104.71W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            AT THE GREELEY AIRPORT

0705 PM     HAIL             3 N GREELEY             40.46N 104.74W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0656 PM     HAIL             AULT                    40.58N 104.73W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             EATON                   40.52N 104.71W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  M1.25 INCH       WELD               CO   TRAINED SPOTTER

0651 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            SECOND ROUND OF GOLFBALL SIZED TONIGHT

0637 PM     HAIL             4 E PIERCE              40.64N 104.68W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0628 PM     HAIL             4 W CARR                40.90N 104.95W
07/29/2016  M1.00 INCH       LARIMER            CO   TRAINED SPOTTER

0626 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             S CARR                  40.90N 104.87W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0535 PM     HAIL             7 SE CARR               40.83N 104.78W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0533 PM     HAIL             NATURAL FORT REST AREA  40.96N 104.92W
07/29/2016  M2.00 INCH       WELD               CO   BROADCAST MEDIA

&&

NGUSACK

Local storm report, Jul 29, 9:40 PM MDT, 2 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
940 PM MDT FRI JUL 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 PM     HAIL             1 NE FORT LUPTON        40.10N 104.79W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0845 PM     HAIL             1 SSW FORT LUPTON       40.07N 104.81W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             2 ESE MILTON RESERVOIR  40.23N 104.60W
07/29/2016  M2.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             NW PIERCE               40.63N 104.75W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0726 PM     HAIL             2 NE MILTON RESERVOIR   40.26N 104.60W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0725 PM     HAIL             1 E GREELEY             40.42N 104.72W
07/29/2016  M1.00 INCH       WELD               CO   TRAINED SPOTTER

0720 PM     TSTM WND DMG     GREELEY                 40.42N 104.74W
07/29/2016                   WELD               CO   NWS EMPLOYEE

            LARGE TREE LIMB DOWN ON UNC GREELEY. POWER LINES DOWN IN
            NE GREELEY.

0715 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  E2.50 INCH       WELD               CO   TRAINED SPOTTER

            DAMAGED CAR WINDOWS

0715 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0713 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            AT THE GREELEY AIRPORT

0705 PM     HAIL             3 N GREELEY             40.46N 104.74W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0656 PM     HAIL             AULT                    40.58N 104.73W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  M1.25 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             EATON                   40.52N 104.71W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0651 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            SECOND ROUND OF GOLFBALL SIZED TONIGHT

0637 PM     HAIL             4 E PIERCE              40.64N 104.68W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0628 PM     HAIL             4 W CARR                40.90N 104.95W
07/29/2016  M1.00 INCH       LARIMER            CO   TRAINED SPOTTER

0626 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             S CARR                  40.90N 104.87W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0535 PM     HAIL             7 SE CARR               40.83N 104.78W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0533 PM     HAIL             NATURAL FORT REST AREA  40.96N 104.92W
07/29/2016  M2.00 INCH       WELD               CO   BROADCAST MEDIA

&&

CMG

Special weather statement, Jul 29, 10:01 PM MDT, 2 hours 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1001 PM MDT FRI JUL 29 2016

COZ038-042-043-300430-
CENTRAL AND SOUTH WELD COUNTY CO-
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY CO-
NORTHEAST WELD COUNTY CO-
1001 PM MDT FRI JUL 29 2016

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL WELD COUNTY UNTIL
1030 PM MDT...

AT 1000 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER EATON...OR 9 MILES NORTH OF GREELEY...MOVING SOUTHEAST AT 20
MPH.  ANOTHER STRONG STORM WAS LOCATED JUST EAST OF GILL.

NICKEL SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
NORTHEASTERN GREELEY...EATON...SEVERANCE...AULT...KERSEY...PIERCE...
PURCELL...GILL...BARNESVILLE...LUCERNE AND GALETON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 4054 10423 4029 10443 4053 10487 4073 10469
TIME...MOT...LOC 0400Z 302DEG 18KT 4055 10472

RPK

Local storm report, Jul 29, 10:18 PM MDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1018 PM MDT FRI JUL 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1010 PM     HAIL             1 NW AULT               40.59N 104.75W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0855 PM     HAIL             1 NE FORT LUPTON        40.10N 104.79W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0845 PM     HAIL             1 SSW FORT LUPTON       40.07N 104.81W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             NW PIERCE               40.63N 104.75W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0735 PM     HAIL             2 ESE MILTON RESERVOIR  40.23N 104.60W
07/29/2016  M2.50 INCH       WELD               CO   TRAINED SPOTTER

0726 PM     HAIL             2 NE MILTON RESERVOIR   40.26N 104.60W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0725 PM     HAIL             1 E GREELEY             40.42N 104.72W
07/29/2016  M1.00 INCH       WELD               CO   TRAINED SPOTTER

0720 PM     TSTM WND DMG     GREELEY                 40.42N 104.74W
07/29/2016                   WELD               CO   NWS EMPLOYEE

            LARGE TREE LIMB DOWN ON UNC GREELEY. POWER LINES DOWN IN
            NE GREELEY.

0715 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0715 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  E2.50 INCH       WELD               CO   TRAINED SPOTTER

            DAMAGED CAR WINDOWS

0713 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            AT THE GREELEY AIRPORT

0705 PM     HAIL             3 N GREELEY             40.46N 104.74W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0656 PM     HAIL             AULT                    40.58N 104.73W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  M1.25 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             EATON                   40.52N 104.71W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0651 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            SECOND ROUND OF GOLFBALL SIZED TONIGHT

0637 PM     HAIL             4 E PIERCE              40.64N 104.68W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0628 PM     HAIL             4 W CARR                40.90N 104.95W
07/29/2016  M1.00 INCH       LARIMER            CO   TRAINED SPOTTER

0626 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             S CARR                  40.90N 104.87W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0535 PM     HAIL             7 SE CARR               40.83N 104.78W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0533 PM     HAIL             NATURAL FORT REST AREA  40.96N 104.92W
07/29/2016  M2.00 INCH       WELD               CO   BROADCAST MEDIA

&&

CMG

Local storm report, Jul 29, 11:22 PM MDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1122 PM MDT FRI JUL 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1121 PM     HAIL             BARNESVILLE             40.48N 104.48W
07/29/2016  M0.75 INCH       WELD               CO   TRAINED SPOTTER

1010 PM     HAIL             1 NW AULT               40.59N 104.75W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0855 PM     HAIL             1 NE FORT LUPTON        40.10N 104.79W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0845 PM     HAIL             1 SSW FORT LUPTON       40.07N 104.81W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0735 PM     HAIL             NW PIERCE               40.63N 104.75W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0735 PM     HAIL             2 ESE MILTON RESERVOIR  40.23N 104.60W
07/29/2016  M2.50 INCH       WELD               CO   TRAINED SPOTTER

0726 PM     HAIL             2 NE MILTON RESERVOIR   40.26N 104.60W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0725 PM     HAIL             1 E GREELEY             40.42N 104.72W
07/29/2016  M1.00 INCH       WELD               CO   TRAINED SPOTTER

0720 PM     TSTM WND DMG     GREELEY                 40.42N 104.74W
07/29/2016                   WELD               CO   NWS EMPLOYEE

            LARGE TREE LIMB DOWN ON UNC GREELEY. POWER LINES DOWN IN
            NE GREELEY.

0715 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M2.00 INCH       WELD               CO   TRAINED SPOTTER

0715 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  E2.50 INCH       WELD               CO   TRAINED SPOTTER

            DAMAGED CAR WINDOWS

0713 PM     HAIL             4 SE LUCERNE            40.44N 104.63W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            AT THE GREELEY AIRPORT

0705 PM     HAIL             3 N GREELEY             40.46N 104.74W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0656 PM     HAIL             AULT                    40.58N 104.73W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             ENE EATON               40.53N 104.70W
07/29/2016  M1.25 INCH       WELD               CO   TRAINED SPOTTER

0655 PM     HAIL             EATON                   40.52N 104.71W
07/29/2016  M1.50 INCH       WELD               CO   TRAINED SPOTTER

0651 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

            SECOND ROUND OF GOLFBALL SIZED TONIGHT

0637 PM     HAIL             4 E PIERCE              40.64N 104.68W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0628 PM     HAIL             4 W CARR                40.90N 104.95W
07/29/2016  M1.00 INCH       LARIMER            CO   TRAINED SPOTTER

0626 PM     HAIL             2 NW NUNN               40.72N 104.81W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             7 SE CARR               40.83N 104.78W
07/29/2016  M1.75 INCH       WELD               CO   TRAINED SPOTTER

0535 PM     HAIL             S CARR                  40.90N 104.87W
07/29/2016  M1.50 INCH       WELD               CO   COCORAHS

0533 PM     HAIL             NATURAL FORT REST AREA  40.96N 104.92W
07/29/2016  M2.00 INCH       WELD               CO   BROADCAST MEDIA

&&

CMG

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 6:14 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	31 min
Jul 29, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	Weld	49 min
Jul 29, 7:18 PM MDT	Severe Thunderstorm Warning	BOU	Weld	57 min
Jul 29, 8:39 PM MDT	Special Weather Statement	BOU	Broomfield	36 min
Jul 29, 8:44 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	31 min
Jul 29, 10:01 PM MDT	Special Weather Statement	BOU	Weld	29 min
Jul 29, 10:06 PM MDT	Severe Thunderstorm Warning	BOU	Weld	39 min
Jul 29, 11:11 PM MDT	Severe Thunderstorm Warning	BOU	Weld	49 min
Jul 30, 3:48 PM MDT	Special Weather Statement	BOU	Weld	42 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2016 Every severe thunderstorm warning in 2016

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.