Alert archive / Colorado / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 178, NWS Denver/Boulder, CO

July 6, 2005Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 6, 2005, 5:29 PM MDT for Lincoln County, Washington County, Colorado. It was in force for 46 min. 3 reports 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 6, 2005, 5:29 PM MDT (23:29 UTC)
Expired: Jul 6, 2005, 6:15 PM MDT
In force: 46 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

Counties Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 109 km from the middle of the area, began a volume at 23:28 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
Jul 6, 5:30 PM MDT	HAIL 1.75	2 N Thurman, CO
Jul 6, 6:25 PM MDT	HAIL 0.75	3 E Arickaree School, CO
Jul 6, 6:25 PM MDT	HAIL 1	2 Nnw Arickaree School, 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 1 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 6, 1:05 PM MDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.5 hours before the alert went out and 33 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: 83 J/kg
Mixed-layer CIN: -471 J/kg
Mixed-layer LCL: 1813 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS55 KBOU 062332
SVRBOU
COC073-121-070015-
/O.NEW.KBOU.SV.W.0178.050706T2329Z-050707T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
529 PM MDT WED JUL 6 2005

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN LINCOLN COUNTY IN EAST CENTRAL COLORADO
  SOUTHERN WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 615 PM MDT

* AT 528 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED NEAR THURMAN...OR ABOUT 33
  MILES NORTHEAST OF LIMON...MOVING EAST AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THURMAN AND
  ARICKAREE SCHOOL.

INTENSE LIGHTNING IS OCCURRING WITH THIS STORM. IF OUTDOORS...STAY
AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF
POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID
USING 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.

HAIL UP TO 1 3/4 INCHES IN DIAMETER HAS BEEN REPORTED WITH THIS 
STORM NEAR THE TOWN OF SHAW IN SOUTH CENTRAL WASHINGTON COUNTY. IF 
YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT 
LIFE AND PROPERTY.

LAT...LON 3967 10363 3942 10359 3933 10316 3957 10316
      3957 10295 3979 10296

$$
BAKER

1 follow-up statement

000 
WWUS55 KBOU 070000
SVSBOU

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
555 PM MDT WED JUL 6 2005

COC073-070005-
/O.CAN.KBOU.SV.W.0178.000000T0000Z-050707T0015Z/
LINCOLN CO-
555 PM MDT WED JUL 6 2005

...THE SEVERE THUNDERSTORM WARNING FOR LINCOLN COUNTY IS CANCELLED...

THE THUNDERSTORM PRODUCING SEVERE WEATHER HAS MOVED OUT OF LINCOLN 
COUNTY. 

LAT...LON 3979 10338 3957 10338 3957 10316 3957 10316
      3957 10295 3979 10296

$$

COC121-070015-
/O.CON.KBOU.SV.W.0178.000000T0000Z-050707T0015Z/
WASHINGTON CO-
555 PM MDT WED JUL 6 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 615 PM MDT FOR SOUTH
CENTRAL WASHINGTON COUNTY...

AT 553 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO GOLF BALL SIZE.  THIS STORM WAS LOCATED 6 MILES EAST OF
THURMAN...OR ABOUT 38 MILES NORTHEAST OF LIMON...MOVING EAST AT 15
MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
THURMAN...ARICKAREE SCHOOL AND ANTON.

HAIL UP TO 1 3/4 INCHES IN DIAMETER HAS BEEN REPORTED NEAR THE TOWN 
OF SHAW OR 24 MILES NORTHEAST OF LIMON IN SOUTHERN WASHINGTON 
COUNTY. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION 
TO PROTECT LIFE AND PROPERTY.

INTENSE RAIN AND STRONG DAMAGING WINDS ARE ALSO LIKELY WITH THIS 
STORM. TAKE COVER IN A SUBSTANTIAL SHELTER UNTIL THE STORM PASSES.

LAT...LON 3979 10338 3957 10338 3957 10316 3957 10316
      3957 10295 3979 10296

$$
BAKER

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 6, 3:10 PM MDT, 2 hours 19 minutes earlier.

Area forecast discussion, Jul 6, 3:10 PM MDT, 2 hours 19 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
310 PM MDT WED JUL 6 2005

.SHORT TERM...LACK OF WINDS ALOFT ASSOCIATED WITH THE STRENGTHENING
UPPER RIDGE IS TAKING ITS TOLL ON AFTERNOON CONVECTION TODAY.  THE
ONLY SHOWERS WE HAVE SEEN SO FAR ARE OCCURRING OVER THE HIGHEST
MOUNTAIN ELEVATIONS AND OVER THE PALMER DIVIDE.  VISIBLE SATELLITE
PICTURES SHOW THAT WARM TEMPERATURES AT THE MID LEVELS ARE A STRONG
CAP TO ANY CONVECTION SO FAR.  THERE IS NO EVIDENCE OF ANY SHORT
WAVE ALOFT TO CAUSE ANY ORGANIZED CONVECTION...SO THE CHANCES OF
STRONG THUNDERSTORMS ON THE PLAINS LOOKS TO BE DIMINISHING.  GIVEN
THE STRENGTH OF THE CAP ON THE PLAINS...WILL HAVE LOWEST POPS
THERE.  WILL STICK WITH 20 PERCENT POPS IN THE MOUNTAINS AND
SCATTERED SHOWERS ON THE PALMER DIVIDE.  EXPECT THAT MOST SHOWER
ACTIVITY WILL BE OVER BY 04Z WITH CLEARING SKIES AFTER THAT.

FOR THURSDAY...WEAK FLOW ALOFT AND WARM TEMPERATURES WILL CONTINUE
OVER THE REGION.  IT IS HARD TO SAY THAT THERE WILL BE NO SHOWERS
ACROSS THE FORECAST AREA.  BUT IT IS ALSO HARD TO PINPOINT WHO WILL
HAVE THE BEST CHANCES FOR PRECIP.  WILL BLANKET THE FORECAST AREA
WITH 10 PERCENT POPS.  700 MB TEMPS WILL BE ALMOST WARM ENOUGH TO
KEEP CONVECTION CAPPED...BUT LOW LEVEL MOISTURE WILL CONTINUE
ADVECTING INTO THE REGION DUE TO THE WEAK SURFACE TROUGH OVER THE
MOUNTAINS INDUCING WEAK SOUTHEASTERLY SURFACE WINDS ACROSS THE
PLAINS.  AS THREAT OF SEVERE STORMS GRADUALLY GOES DOWN...THE THREAT
OF HEAVY RAIN PRODUCING SHOWERS WILL BE ON THE INCREASE.

.LONG TERM...THU NGT-SAT...MDLS MAINTAIN AN ELONGATED UPR RDG
OVR THE CNTRL AND SWRN U.S. THRU THE PRD.  THE AIR MASS WILL
REMAIN RELATIVELY DRY AND SUBSIDENT BUT UNSTABLE FM THE ERN
SLP OF THE MTNS OVR THE URBAN CORRIDOR AND PLAINS.  THE HIEST
CAPES UP TO 1000J/KG ARE THU NGT ON THE PLAINS WITH THE PALMER
DVD BEING MST FVRD FOR CONVECTION.  CAPES ON FRI AND SAT AFTNS
AND EVES ARE IN THE 400-600J/KG RANGE.  CAPES THRU THE PRD ARE
BLO 200J/KG IN THE MTNS.  WILL KEEP ISOLD AFTN AND EVE SHWRS
AND TSTMS ACROSS THE AREA THRU SAT.  VRY WARM AIR ALF WILL
RESULT IN CONTD VRY WARM MAX TEMPS ESPCLY ON PLAINS. WILL MAKE
ONLY SML ADJUSTMNETS TO MOS TEMP GUIDANCE VALUES.

IN EXTENDED PERIOD...SUN-WED...MDLS MAINTAIN UPR RDG OVER CNTRL
RCKYS THRU PRD.  GFS KEEPS AMS GNLY DRY...BUT WILL LEAVE SLIGHT
CHC OF TSTMS EACH AFTN AND EVE BASED MORE ON CLIMO.  GFS DRIVES
MSTR FM HURRICANE DENNIS UNDERNEATH UPR RDG ACRS OK AND TX INTO
NM BY END OF PRD.  WHILE MST OF THIS MSTR WILL RMN WELL TO S OF
AREA...WILL TAKE A WAIT AND SEE ATTITUDE ABOUT THIS POSSIBILITY.
TEMPS WILL BE NR TO SLIGHTLY ABV SEASONAL NORMS.

&&

.BOU...NONE.

&&

KDRBY/GARD...WFO BOULDER

Hazardous weather outlook, Jul 6, 11:16 AM MDT, 6 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1116 AM MDT WED JUL 06 2005

COZ030>051-071200-
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-
1116 AM MDT WED JUL 06 2005

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

.DAY ONE...TODAY AND TONIGHT

NORTHWEST FLOW ALOFT WILL COMBINE WITH AN UNSTABLE AIRMASS ACROSS
NORTHEAST COLORADO TO ONCE AGAIN PRODUCE SCATTERED AFTERNOON AND
EVENING THUNDERSTORMS.  ALTHOUGH THE WINDS ALOFT ARE SLIGHTLY WEAKER
THAN YESTERDAY...ENOUGH WINDS AND INSTABILITY WILL BE PRESENT FOR
STRONG THUNDERSTORMS TO FORM OVER THE NORTHEAST COLORADO PLAINS.
LARGE HAIL WILL ONCE AGAIN BE THE MAIN THREAT FROM THE STORMS.
HEAVY RAIN WITH LOCALIZED FLOODING WILL ALSO BE POSSIBLE...
ESPECIALLY IF THUNDERSTORMS FORM OVER AREAS THAT HAVE RECEIVED HEAVY
RAIN IN THE PAST COUPLE EVENINGS.  MOST THUNDERSTORM ACTIVITY WILL
BE EAST OF A LINE THAT RUNS FROM GREELEY TO DENVER INTERNATIONAL
AIRPORT.

IN THE MOUNTAINS...ONLY ISOLATED...HIGH BASED THUNDERSTORMS ARE
EXPECTED WHICH WILL PRODUCE GUSTY WINDS AND LIGHTNING BUT LITTLE
RAINFALL.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND EVENING
OVER THE NORTHEAST PLAINS.

DANKERS/GARD...WFO BOULDER

In the hours before

Local storm report, Jul 6, 5:23 PM MDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DENVER CO
523 PM MDT WED JUL 06 2005

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

0522 PM     HAIL             12 SE LINDON            39.61N 103.24W
07/06/2005  1.75 INCH        WASHINGTON         CO   CO-OP OBSERVER

&&

RAY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 6:00 PM MDT	Tornado Warning	BOU	Logan, Weld	45 min
Jul 5, 6:39 PM MDT	Tornado Warning	BOU	Logan	31 min
Jul 5, 7:03 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Washington	48 min
Jul 6, 5:07 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	23 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2005 Every severe thunderstorm warning in 2005

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.