Alert archive / Colorado / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 105, NWS Denver/Boulder, CO

August 7, 1999Boulder County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 7, 1999, 2:37 PM MDT for Boulder County, Colorado. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 7, 1999, 2:37 PM MDT (20:37 UTC)
Expired: Aug 7, 1999, 3:15 PM MDT
In force: 38 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Boulder County, CO

The radar

The Denver radar (KFTG), 77 km from the middle of the area, began a volume at 20:40 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 text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Aug 6, 3:11 PM MDT, 23 hours 26 minutes earlier.

Area forecast discussion, Aug 6, 3:11 PM MDT, 23 hours 26 minutes before

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
311 PM MDT FRI AUG 6 1999

CURRENTLY...PLENTY OF MOISTURE STILL OVER THE AREA WITH LOWER LEVELS
STILL WITH LOWER 60S DEW POINTS.  YESTERDAYS MAIN CONVECTION AXIS
SHIFTED SOUTH A BIT AS THE MIDNIGHT GUY THOUGHT...WITH SOUTHERN ZONE 46
AND ZONE 47 WITH THE BIGGEST PROBLEMS.  A LOT OF SAME IS IN PLACE
TODAY ESPECIALLY IN THE ABOVE MENTIONED ZONES...WITH THE REST OF THE
ZONES CURRENTLY ON TRACK FOR A MORE SCATTERED COVERAGE. WILL MENTION
HEAVY RAINS IN THE A FEW PLACE AND NO WATCHES FOR NOW.

UPPER RIDGE CENTER SHIFTS A BIT WEST THROUGH THE LATER PERIODS...
STILL REMAINING WELL TO OUR SOUTH.  WATER VAPOR PICTURES INDICATING
THE ADVERTISED DRYING IS PARTIALLY OCCURRING UPSTREAM...BUT
MONSOONS NOT OVER YET.  MOISTURE GRIDS SHOWING SOME DRYING FOR THE
WEEKEND...BUT EVEN IF THE DRY TOUGH ON THE WATER VAPOR PICTURES TO
OUR WEST GETS OVER THE AREA...SOME CONVECTION IS STILL PROBABLE...AS
CURRENT SITUATION INDICATES.  ALSO THERES SO MUCH SOIL MOISTURE
AROUND HERE...THAT THE LOW LEVELS SHOULD REMAIN WET FOR DAYS TO
COME.  THE THETA-E GRIDS SHOW A MOISTURE AXIS OVER THE FORECAST AREA
THROUGH SATURDAY EVENING...BUT STILL HAVE A WEAKER VERSION AROUND ON
SUNDAY.  THE CROSS SECTIONS AND FORECAST SOUNDINGS INDICATE AMPLE
POTENTIAL INSTABILITY...PRECIPITABLE WATER...AND HEATING...BUT THE
LAPSE RATE ARE ONLY FAIR TO GOOD.  SURFACE GRIDS HINT AT A LOW LEVEL
SURGE INTO THE PLAINS SATURDAY AFTERNOON.  OVERALL...WILL KEEP SOME
POPS IN ALL THE PERIODS IN ALL AREAS...LESS ON SUNDAY...AND WILL
HAVE LESS CLOUDS AND WARMER TEMPERATURES.

IN THE EXTENDED...THE DRYING TREND SUPPOSEDLY CONTINUES...ILL
PARTIALLY BUY IT...BUT NOT COMPLETELY...AND WILL STILL KEEP SOME
POPS IN.             RJK

.DEN...NONE.

Nearby

Severe Thunderstorm Warnings in Colorado, 1999 Every severe thunderstorm warning in 1999

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.