Alert archive / Colorado / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 12, NWS Denver/Boulder, CO

May 27, 2001Elbert County, Lincoln County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 27, 2001, 3:06 AM MDT for Elbert County, Lincoln County, Colorado. It was in force for 54 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: May 27, 2001, 3:06 AM MDT (09:06 UTC)
Expired: May 27, 2001, 4:00 AM MDT
In force: 54 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Elbert County, CO, Lincoln County, CO

The radar

The Pueblo radar (KPUX), 81 km from the middle of the area, began a volume at 09:06 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 (KDNR), launched 00:00Z, 9.1 hours before the alert went out and 96 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: 15 J/kg
Mixed-layer CIN: -166 J/kg
Mixed-layer LCL: 2373 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 May 26, 2:58 PM MDT, 12 hours 8 minutes earlier.

Area forecast discussion, May 26, 2:58 PM MDT, 12 hours 8 minutes before

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
258 PM MDT SAT MAY 26 2001

SHORT TERM DISCUSSION:  RADAR SHOWING SOME CONVECTION GOING ON...
BEST COVERAGE NOW OVER LARIMER AND WELD COUNTIES.  CONSIDERING LOW
LEVEL MOISTURE AND HEATING...BEST POPS WILL BE OVER THE URBAN
CORRIDOR AND THE PALMER RIDGE...LITTLE EXPECTED OUT OVER THE
NORTHEAST CORNER WHERE PLENTY OF CIN REMAINS.  PLENTY OF MIDDLE AND
UPPER LEVEL CLOUDINESS UP STREAM WITH THE UPPER RIDGE...WILL NOT
CLEAR THINGS OUT OVERNIGHT ANYWHERE.  AS A RESULT...TEMPERATURES TO
BE A BIT WARMER OVERNIGHT.

LONG TERM DISCUSSION:  THE UPPER RIDGE AXIS HANGS BACK OVER WESTERN
COLORADO UNTIL SUNDAY NIGHT THEN PUSHES EASTWARD OUR WAY.  BY MIDDAY
MONDAY THE RIDGE AXIS IS OVER EASTERN COLORADO WITH AN UPPER TROUGH
MOVING INTO WESTERN COLORADO MONDAY OVERNIGHT.  THIS HAS SLOWED DOWN
QUITE A BIT FROM YESTERDAYS RUNS.  GRIDS SHOW A FRONT MOVING INTO
THE NORTHEAST BY SUNDAY AFTERNOON.  THE THETA-E GRIDS ARE SHOWING
DECENT LOW LEVEL MOISTURE FLUSHING WAY EAST...THEN SOUTH BY
AFTERNOON.  DIV-Q GRIDS SHOW LITTLE IN THE WAY OF ANY FORCING
THROUGH THE PERIOD.  WILL KEEP SOME POPS IN ALL AREAS ON SUNDAY NONE
THE LESS.  ON MONDAY...GRIDS SHOW DECENT LOW LEVEL SOUTHEASTERLY
FLOW FOR THE PLAINS.  CROSS SECTIONS SHOW DECENT POTENTIAL
INSTABILITY ...AND A GOOD THETA-E AXIS OVER THE PLAINS.  TROUBLE
IS...THERE WILL BE CONSIDERABLY LESS HEATING.  MORE MOISTURE AND
CLOUDS ON MONDAY.  WILL KEEP SCATTERED POPS IN AT THIS TIME.  FOR
TEMPERATURES... GRIDS ARE STILL SHOWING SUNDAY THE WARMEST
DAY...WITH HIGHS ABOUT 1.0-4.0 C WARMER THEN TODAY.  THATS NOT
CONSIDERING CLOUD COVER.  FRO MONDAY...THE GRIDS GIVE THAT BACK AND
RETURN TO READINGS SLIGHTLY COOLER THEN TODAY.

IN THE EXTENDED PERIOD...FROM LOOKING AT SEVERAL OF THE MEDIUM RANGE
MODELS...AN UPPER TROUGH PUSHES THROUGH ON TUESDAY...THEN
NORTHWESTERLY FLOW ALOFT IS OVER US INTO FRIDAY...BEFORE AN UPPER
RIDGE GETS BACK IN HERE ON FRIDAY.  HOWEVER...THE 12Z AVN DIFFERS
GREATLY FROM THE 00Z MRF RUN.  IT SHOWS A STRONG UPPER TROUGH/CLOSED
LOW MOVING SOUTHWARD RIGHT AT US FOR THURSDAY.  THEY ALSO SHOW A
DECENT COLD FRONT IN HERE FOR LATE TUESDAY/EARLY WEDNESDAY...THEN
ANOTHER ON THURSDAY.   CURRENT EXTENDED NOT TO BAD WILL KEEP SOME
KIND OF POPS GOING THROUGHOUT ALL THE PERIODS.  AFTER ALL IT IS LATE
MAY/EARLY JUNE.   RJK

.DEN...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 2:30 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	30 min
May 27, 2:40 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver, Jefferson	35 min
May 27, 3:02 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	43 min
May 27, 3:23 PM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	37 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2001 Every severe thunderstorm warning in 2001

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.