Alert archive / Colorado / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 27, NWS Grand Junction, CO
NWS Grand Junction, CO issued this severe thunderstorm warning at Jul 30, 2000, 1:37 PM MDT for Delta County, Gunnison 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
- Jul 30, 2000, 1:37 PM MDT (19:37 UTC)
- Expired
- Jul 30, 2000, 2:15 PM MDT
- In force
- 38 min
- Issued by
- NWS Grand Junction, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Delta County, CO, Gunnison County, CO
The radar
The Grand Junction radar (KGJX), 74 km from the middle of the area, began a volume at 19:41 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
Grand Junction, CO (KGJT), launched 12:00Z, 7.6 hours before the alert went out and 100 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3360 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Grand Junction, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 30, 12:20 PM MDT, 1 hour 17 minutes earlier.
Area forecast discussion, Jul 30, 12:20 PM MDT, 1 hour 17 minutes before
WESTERN COLORADO & EASTERN UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 1220 PM MDT SUN JUL 30 2000 NO CHANGES IN THE SHORT TERM. RIDGE AXIS WILL REMAIN CENTERED OVER THE UT/NV BORDER...RESULTING IN CONTINUED HOT TEMPERATURES FOR THE FA. A SERIES OF WEAK WAVES WILL ROTATE SOUTHWARD AROUND THE HIGH CENTER...AND WILL PROVIDE THE FOCUS FOR ISOLATED TO WIDELY SCATTERED AFTERNOON CONVECTION ALONG THE UT/CO BORDER. THE GREATEST CHANCE FOR THUNDERSTORM ACTIVITY WILL BE IN THE ABAJO AND SAN JUAN MOUNTAINS. DYNAMICS ARE A LITTLE BETTER TODAY THAN YESTERDAY. A WEAK SHORTWAVE IS FORECAST TO MOVE ACROSS SOUTHWEST COLORADO BY LATE DAY. PW VALUES ARE NEARLY 20% HIGHER TODAY...AND THE TAIL END OF A WEAK 40 KT JET MAXIMA OVER THE REGION WILL ADD A SMALL BIT OF DYNAMICS. SIMILAR CONDITIONS WILL EXIST FOR THE BEGINNING OF THE WEEK. IN THE EXTENDED...THE MRF SUGGESTS A BEGINNING OF THE END OF THIS LONG SIEGE OF THE HIGH PRESSURE RIDGE. HOWEVER ANY SIGNIFICANT CHANGES ARE FORECAST TO TAKE PLACE AFTER THE FORECAST PERIOD OF THIS PACKAGE. DAY 3 TO 5 LOOKS TO SEE THE CENTER OF THE HIGH DRIFT BACK EASTWARD...SO NO RELIEF OF CURRENT CONDITIONS THIS WEEK. AFTER THAT...A SERIES OF WAVES ARE FORECAST TO MOVE OUT OF THE GULF OF ALASKA AND ACROSS THE NORTHERN U.S. AND SOUTHERN CANADA. THIS WILL TEND TO BREAK DOWN THE NORTHERN PORTION OF THE RIDGE. BUT...FOR NOW...CONTINUED HOT AND DRY. SMOKE FROM/ SEVERAL WESTERN FIRES WILL ALSO RESULT IN HAZY CONDITIONS FOR THE NEXT FEW DAYS. BA .GJT...NONE.
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 3:17 PM MDT | Flash Flood Warning | GJT | Grand | 103 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2000Every severe thunderstorm warning in 2000
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.