Alert archive / Colorado / Mesoscale Discussions in 2003

Mesoscale Discussion 1817

July 13, 200310 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 4:43 PM MDT for 10 counties in Colorado. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 13, 2003, 4:43 PM MDT (22:43 UTC)
Expired: Jul 13, 2003, 6:45 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Baca County, CO, Bent County, CO, Cheyenne County, CO, Crowley County, CO, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Prowers County, CO

The radar

The Pueblo radar (KPUX), 93 km from the middle of the area, began a volume at 22:45 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 12:00Z, 10.7 hours before the alert went out and 150 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: 193 J/kg
Mixed-layer CIN: -447 J/kg
Mixed-layer LCL: 3001 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 65 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.

509 
ACUS11 KWNS 132243
SWOMCD
SPC MCD 132243 
OKZ000-COZ000-NMZ000-140045-

MESOSCALE DISCUSSION 1817
NWS STORM PREDICTION CENTER NORMAN OK
0543 PM CDT SUN JUL 13 2003

AREAS AFFECTED...ERN CO...EXTREME NERN NM AND WRN OK PANHANDLE

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 132243Z - 140045Z

A FEW SEVERE STORMS WITH DAMAGING DOWNBURST WINDS WILL BE POSSIBLE
THROUGH LATE AFTERNOON.  ISOLATED SEVERE HAIL WILL ALSO BE POSSIBLE
WITH THE STRONGEST CELLS.

STORMS CONTINUE TO INCREASE OVER ERN CO ALONG AND W OF DRYLINE. 
AREA PROFILERS INDICATE NWLY MID TO UPPER LEVEL FLOW ON THE ORDER OF
20-30 KTS...ALONG WITH SELY SURFACE WINDS.  THIS IS PRODUCING AN
ENVIRONMENT FAVORABLE FOR SWD MOVING STORMS.  GIVEN MODERATE
INSTABILITY IN PLACE...ISOLATED SUPERCELLS WILL REMAIN POSSIBLE. 
VERY LARGE TEMP/DEWPOINT SPREADS IN THE BOUNDARY LAYER INDICATE
LARGE EVAPORATION / DOWNBURST POTENTIAL.  LARGE HAIL THREAT WILL
PERSIST OVER EXTREME ERN CO WITH STORMS ALONG AND E OF THE DRYLINE
WHERE DEWPOINTS IN THE UPPER 50S ARE BEING INGESTED.

..JEWELL.. 07/13/2003

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GLD...AMA...PUB...BOU...ABQ...

39590219 36970210 36890383 37910440 38860395 39830317

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 12, 6:10 PM MDT	Mesoscale Discussion	SPC	Logan, Phillips, Sedgwick	2 hr
Jul 12, 8:02 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Phillips, Sedgwick, Yuma	118 min

Nearby

Mesoscale Discussions in Colorado, 2003 Every mesoscale discussion in 2003

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.