Alert archive / Colorado / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 15, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 22, 1996, 4:45 PM MDT for Logan County, Colorado. It was in force for 45 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
- May 22, 1996, 4:45 PM MDT (22:45 UTC)
- Expired
- May 22, 1996, 5:30 PM MDT
- In force
- 45 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Logan County, CO
The radar
The Cheyenne radar (KCYS), 150 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 22, 5:35 PM MDT | Hail 1.75 | Crook, 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
Denver, CO (KDNR), launched 12:00Z, 10.8 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 73 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.
In the hours before
Special weather statement, May 22, 10:53 AM MDT, 5 hours 52 minutes before
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</html>Special weather statement, May 22, 11:30 AM MDT, 5 hours 15 minutes before
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</html>Special weather statement, May 22, 1:22 PM MDT, 3 hours 23 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 120 PM MDT WED MAY 22 1996 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS: A WEAK UPPER LEVEL DISTURBANCE WAS MOVING ACROSS NORTH CENTRAL COLORADO AT THIS TIME WITH SOME THUNDERSTORM DEVELOPMENT EVIDENT ALONG THE FOOTHILLS AND ALONG THE WYOMING BORDER. DUE TO THE FASTER TIMING OF THIS SYSTEM...THUNDERSTORM DEVELOPMENT WILL LIKELY BEGIN SOONER THAN EARLIER ANTICIPATED IN THE NORTHEAST PLAINS. CLOUDS AND SHOWERS ARE EXPECTED TO DECREASE IN THE MOUNTAINS AND FOOTHILLS THIS AFTERNOON AS THIS SYSTEM EXITS THE AREA...HOWEVER A FEW THUNDERSTORMS ARE STILL POSSIBLE LATER IN THE DAY. THE STRONGER STORMS WILL DEVELOP NORTH AND EAST OF A SURFACE LOW THAT HAS DEVELOPED OVER EASTERN ADAMS AND ARAPAHOE COUNTIES. DUE TO THE AVAILABILITY OF BETTER LOW LEVEL MOISTURE IN THESE AREAS SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP...MAINLY EAST OF THE URBAN CORRIDOR AFTER 2 PM. A FEW STRONG THUNDERSTORMS ARE POSSIBLE EAST OF A LINE EXTENDING FROM BYERS NORTH TO THE WYOMING BORDER. COUNTIES INCLUDED IN THIS AREA ARE: EASTERN ADAMS...EASTERN ARAPAHOE...MORGAN...EASTERN WELD... AND WESTERN WASHINGTON COUNTIES. BRIEF HEAVY RAIN...SMALL HAIL AND GUSTY WINDS TO 50 MPH ARE POSSIBLE WITH SOME OF THESE STORMS. AS THIS SYSTEM CONTINUES EAST...A FEW SEVERE STORMS ARE POSSIBLE BY 3 PM IN EASTERN WASHINGTON...LOGAN...PHILLIPS AND SEDGEWICK COUNTIES. HEAVY RAIN...LARGE HAIL AND GUSTY WINDS IN EXCESS OF 58 MPH ARE THE PRIMARY THREATS OF THESE STORM IF THEY BECOME SEVERE. SPOTTER ACTIVATION MAY BE NEEDED IN THE FOLLOWING COUNTIES AF(TER 230 PM: LOGAN...MORGAN...EASTERN WASHINGTON...PHILLIPS AND SEDGEWICK COUNTIES. FMC
Special weather statement, May 22, 2:59 PM MDT, 1 hour 46 minutes before
COZ042-044-048>050-222200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 255 PM MDT WED MAY 22 1996 A TORNADO WATCH HAS BEEN ISSUED FOR A PORTION OF NORTHEASTERN COLORADO UNTIL 900PM MDT. A WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE DEVELPMENT OF SEVERE THUNDERSTORMS AND POSSIBLY TORNADOES. COUNTIES INCLUDED IN THE WATCH AREA ARE: LOGAN...MORGAN...PHILLIPS...SEDGEWICK...NORTHERN WASHINGTON AND EASTERN WELD COUNTIES. VERY MOIST AND UNSTABLE LOW LEVEL AIRMASS WILL COMBINE WITH AN UPPER LEVEL DISTURBANCE MOVNING INTO THE AREA TO TRIGGER SCATTERED THUNDERSTORMS IN THE WATCH AREA LATER THIS AFTERNOON AND EVENING. THE GREATEST THREAT EXTENDS FORT MORGAN TO THE WYOMING BORDER EASTWARD TO THE KANSAS BORDER. A SEVERE THUNDERSTORM HAD ALREADY DEVELOPED NORTHEAST OF CHEYENNE WYOMING AND CONTINUED TO INTENIFY. THESE STORMS ARE EXPECTED TO DEVELOP AND PROPOGATE INTO NORTHEAST COLORADO LATER THIS AFTERNOON AND EVENING. A FEW OF THESE STORM MAY SPAWN TORNADOES. LARGE HAIL...GUSTY WINDS IN EXCESS OF 60 MPH AND HEAVY RAIN ARE ALSO POSSIBLE WITH THESE STORMS. SEEK SHELTER IF A STORM APPROACHES YOUR AREA AND REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORECMENT AGENCY. LAT...LON 4060 10270 4061 10299 4083 10299 4083 10270
Special weather statement, May 22, 3:02 PM MDT, 1 hour 43 minutes before
COZ042-044-048>050-222200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO...CORRECTED 300 PM MDT WED MAY 22 1996 .CORRECTED TO INCLUDE SPOTTER ACTIVATION. A TORNADO WATCH HAS BEEN ISSUED FOR A PORTION OF NORTHEASTERN COLORADO UNTIL 900PM MDT. A WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE DEVELPMENT OF SEVERE THUNDERSTORMS AND POSSIBLY TORNADOES. COUNTIES INCLUDED IN THE WATCH AREA ARE: LOGAN...MORGAN...PHILLIPS...SEDGEWICK...NORTHERN WASHINGTON AND EASTERN WELD COUNTIES. VERY MOIST AND UNSTABLE LOW LEVEL AIRMASS WILL COMBINE WITH AN UPPER LEVEL DISTURBANCE MOVNING INTO THE AREA TO TRIGGER SCATTERED THUNDERSTORMS IN THE WATCH AREA LATER THIS AFTERNOON AND EVENING. THE GREATEST THREAT EXTENDS FORT MORGAN TO THE WYOMING BORDER EASTWARD TO THE KANSAS BORDER. SPOTTER ACTIVATION WILL BE NECESSARY IN THOSE AREAS THIS AFTERNOON AND EVENING. A SEVERE THUNDERSTORM HAD ALREADY DEVELOPED NORTHEAST OF CHEYENNE WYOMING AND CONTINUED TO INTENIFY. THESE STORMS ARE EXPECTED TO DEVELOP AND PROPOGATE INTO NORTHEAST COLORADO LATER THIS AFTERNOON AND EVENING. A FEW OF THESE STORM MAY SPAWN TORNADOES. LARGE HAIL...GUSTY WINDS IN EXCESS OF 60 MPH AND HEAVY RAIN ARE ALSO POSSIBLE WITH THESE STORMS. SEEK SHELTER IF A STORM APPROACHES YOUR AREA AND REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORECMENT AGENCY. FMC LAT...LON 4060 10270 4061 10299 4083 10299 4083 10270
Special weather statement, May 22, 3:46 PM MDT, 59 minutes before
COZ042-044-048>050-230100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 345 PM MDT WED MAY 22 1996 ...A TORNADO WATCH REMAINS IN EFFECT FOR A PORTION OF NORTHEASTERN COLORADO UNTIL 900PM MDT... A WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS AND POSSIBLY TORNADOES. COUNTIES INCLUDED IN THE WATCH AREA ARE: LOGAN...MORGAN...PHILLIPS...SEDGEWICK...NORTHERN WASHINGTON AND EASTERN WELD COUNTIES. A FEW OF THE TOWNS IN THE WATCH AREA INCLUDE: AKRON...FORT MORGAN...HOLYOKE...STERLING AND JULESBURG. VERY MOIST AND UNSTABLE LOW LEVEL AIRMASS WILL COMBINE WITH AN UPPER LEVEL DISTURBANCE MOVING INTO THE AREA TO TRIGGER SCATTERED THUNDERSTORMS IN THE WATCH AREA THE REST OF THIS AFTERNOON AND EVENING. A SEVERE THUNDERSTORM LOCATED 45 MILES SOUTH OF SCOTTBLUFF NEBRASKA CONTINUED TO MOVE SOUTHEAST. THIS STORM MAY MAKE ITS WAY INTO NORTHERN LOGAN AND SEDGEWICK COUNTIES WITHIN THE NEXT HOUR. A FEW OF THESE STORM MAY SPAWN TORNADOES. LARGE HAIL...GUSTY WINDS IN EXCESS OF 60 MPH AND DANGEROUS LIGHTNING AND HEAVY RAIN ARE ALSO POSSIBLE WITH THESE STORMS. SEEK SHELTER IF A STORM APPROACHES YOUR AREA AND REPORT ANY SEVERE WEATHER TO THE NEAREST LAW ENFORECMENT AGENCY. FMC LAT...LON 4060 10270 4061 10299 4083 10299 4083 10270
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 5:25 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Sedgwick | 50 min |
Nearby
Severe Thunderstorm Warnings in Colorado, 1996Every severe thunderstorm warning in 1996
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; radar from the NEXRAD Level II archive.