Alert archive / Colorado / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 1, NWS Grand Junction, CO
NWS Grand Junction, CO issued this severe thunderstorm warning at Jul 9, 2001, 1:48 PM MDT for Montrose County, Colorado. It was in force for 42 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 9, 2001, 1:48 PM MDT (19:48 UTC)
- Expired
- Jul 9, 2001, 2:30 PM MDT
- In force
- 42 min
- Issued by
- NWS Grand Junction, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Montrose County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 9, 2:02 PM MDT | Hail 0.88 | Redvale, CO |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 7.8 hours before the alert went out and 83 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
- 8 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 1891 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 141 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 9, 2:54 AM MDT, 10 hours 54 minutes earlier.
Area forecast discussion, Jul 9, 2:54 AM MDT, 10 hours 54 minutes before
WESTERN COLORADO & EASTERN UTAH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAND JUNCTION CO 254 AM MDT MON JUL 9 2001 NO MAJOR CHANGES TO GOING FORECAST AS MOIST SOUTHERLY FLOW REMAINS ENTRENCHED OVER INTERMOUNTAIN REGION. MORNING CONVECTION ON THE DECREASE WITH HEAVIEST 24 HR RAINFALL STANDING AT JUST OVER 0.50 INCHES AT JENSEN UTAH. MOST REPORTING LOCATIONS WHICH DID RECEIVE RAIN YESTERDAY AFTERNOON AND EVENING SAW LESS THEN 0.25 INCHES. EXPECT MUCH OF THE SAME TODAY...WITH MORNING SUNSHINE GIVING WAY TO SCATTERED AFTERNOON SHOWERS AND THUNDERSTORMS. WATCHING A WEAK WAVE OVER WEST TX THIS MORNING...WHICH SHOULD ARRIVE OVER OUR AREA BY THIS AFTERNOON...ENHANCING CONVECTIVE THREAT WITH A LITTLE ADDED LIFT. IN ADDITION...SHEAR PROFILES IMPROVING SLIGHTLY AS WESTERN U.S. TROUGH SENDS SOME ENERGY INTO THE REGION OVER THE NEXT 48 HOURS. THIS WILL ALLOW FLOW ALOFT TO TRANSITION FROM SOUTHERLY COMPONENT TODAY...TO A MORE WESTERLY COMPONENT BY LATE TUESDAY. THIS WILL BRING SOME DRYING TO THE REGION LATE TUE AND WED...BUT WILL ALSO ENHANCE WIND SPEED AND DIRECTIONAL SHEAR...LEADING TO BETTER ORGANIZATION OF CONVECTION TUE. PLAN ON MAINTAINING SCT POPS THROUGH THE SHORT-TERM AND CURRENT EXTENDED ON TRACK ADVERTISING DRIER CONDS LATER IN THE WEEK. WILL ALSO CONTINUE TO GO ABOVE GUIDANCE TEMPS FOR AFTERNOON READINGS AS MODELS HAVE BEEN CONSISTENTLY LOW FOR THE LAST SEVERAL DAYS. WESTERN COLORADO AND EASTERN UTAH EMERGENCY MANAGERS SHOULD MAINTAIN A HEIGHTENED LEVEL OF WEATHER AWARENESS THROUGH THIS EVENING DUE TO SCATTERED THUNDERSTORMS...WHICH WILL PRODUCE LOCALLY HEAVY RAIN AND STRONG WIND GUSTS IN EXCESS OF 50 MPH. COLTONO .GJT...NONE.
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 3:22 PM MDT | Severe Thunderstorm Warning | GJT | Montrose, Ouray | 38 min |
| Jul 9, 4:44 PM MDT | Severe Thunderstorm Warning | GJT | Ouray | 46 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2001Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.