Alert archive / Colorado / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 145, NWS Goodland, KS
NWS Goodland, KS issued this severe thunderstorm warning at Jul 19, 2009, 4:08 PM MDT for Cheyenne County, Colorado. It was in force for 67 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 19, 2009, 4:08 PM MDT (22:08 UTC)
- Expired
- Jul 19, 2009, 5:15 PM MDT
- In force
- 67 min
- Issued by
- NWS Goodland, KS
- Area
- Storm-based polygon
County Cheyenne County, CO
The radar
The Goodland radar (KGLD), 98 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 128 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
- 139 J/kg
- Mixed-layer CIN
- -402 J/kg
- Mixed-layer LCL
- 2155 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Goodland, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 2:45 PM MDT, 1 hour 23 minutes earlier.
Area forecast discussion, Jul 19, 2:45 PM MDT, 1 hour 23 minutes before
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</html>Hazardous weather outlook, Jul 19, 10:31 AM MDT, 5 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GOODLAND KS 1031 AM MDT SUN JUL 19 2009 COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-201215- YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON- SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA- DUNDY-HITCHCOCK-RED WILLOW- 1031 AM MDT SUN JUL 19 2009 /1131 AM CDT SUN JUL 19 2009/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO. .DAY ONE...THIS AFTERNOON AND TONIGHT WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP NEAR A SURFACE TROUGH OVER EASTERN COLORADO AFTER 3 PM MDT. THE AIR MASS OVER THE AREA WILL BE UNSTABLE...AND MID LEVEL WIND SHEAR WILL BE SUFFICIENT ENOUGH TO PRODUCE SUPERCELL THUNDERSTORMS. STORMS WILL MOVE OVER SOUTHWEST NEBRASKA AND NORTHWEST KANSAS DURING THE EVENING. SOME OF THE STORMS MAY BECOME SEVERE... ESPECIALLY ALONG THE KANSAS/COLORADO BORDER. THE MAIN THREATS WITH THE STORMS WILL BE LARGE HAIL AND DAMAGING WINDS...BUT THERE IS ALSO THE POTENTIAL FOR TORNADIC DEVELOPMENT WITH A FEW OF THE STORMS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A COLD FRONT WILL MOVE THROUGH THE TRI-STATE AREA MONDAY. IT WILL EXTEND ALONG INTERSTATE 70 BY THE MID AFTERNOON. THUNDERSTORMS WILL DEVELOP ALONG THE FRONT...MAINLY EAST OF HIGHWAY 83 BY THE AFTERNOON. SOME OF THE STORMS MAY BECOME SEVERE WITH HEAVY RAIN AND HAIL THE GREATEST THREATS. DUE TO THE CURRENT WEATHER PATTERN...THERE WILL BE A CHANCE FOR AFTERNOON AND EVENING THUNDERSTORMS MOST DAYS THROUGH NEXT WEEK... BUT THE BEST CHANCES WILL OCCUR TUESDAY...THURSDAY...AND SATURDAY. STORMS WILL PRODUCE HAIL...DAMAGING WINDS...AND DANGEROUS LIGHTNING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON OVER EASTERN COLORADO...AND OVER THE ENTIRE TRI-STATE AREA TONIGHT.
The office that day
Everything else NWS Goodland, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 5:51 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 54 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 2009Every severe thunderstorm warning in 2009
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.