A non-mesocyclone tornado occurred southeast of Sheridan Lake.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PUB wrote it up.
A non-mesocyclone tornado occurred southeast of Sheridan Lake.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pueblo, CO wrote its last area forecast discussion before the first event at Aug 23, 2:26 PM MST, 1 hour 57 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PUEBLO CO 326 PM MDT THU AUG 23 2012 .SHORT TERM... (TONIGHT AND FRIDAY) A CLOSED UPPER LOW WILL CONTINUE TO MOVE EAST INTO THE FOUR CORNERS REGION THIS AFTERNOON...EVENTUALLY REACHING SOUTHERN COLORADO BY FRIDAY MORNING. CURRENT WATER VAPOR IMAGERY SHOWS A WELL DEFINED LOW...WITH PLENTY OF MOISTURE AHEAD OF IT...MOVING EASTWARD ALONG THE AZ/UT BORDER. SATELLITE ESTIMATED TOTAL PW VALUES REMAIN 100 TO 150 PERCENT OF NORMAL ACROSS THE FORECAST AREA AS VALUES OF PW RANGE FROM 1.2 TO 1.5 INCHES. DEW POINTS ALSO REMAIN HIGH...WITH LOW TO MID 50S ACROSS THE EASTERN PLAINS...MID TO UPPER 40S ACROSS THE I-25 CORRIDOR...AND LOWER TO MID 40S ACROSS THE HIGHER TERRAIN. THE HRRR/RAP/NAM12 CONTINUE TO FORECAST SHOWERS AND THUNDERSTORMS ACROSS THE HIGHER ELEVATIONS AND I-25 CORRIDOR THROUGH 00Z...SPREADING THE SHOWERS AND STORMS TO THE EASTERN PLAINS BETWEEN 00 AND 06Z. LOCALLY HEAVY RAIN IS POSSIBLE WITH ANY SHOWERS OR THUNDERSTORMS THAT DEVELOP. RAIN RATES OF 1+ INCH/HR HAVE ALREADY BEEN REPORTED WITH THUNDERSTORMS NEAR THE WOODLAND PARK AREA THIS AFTERNOON. THE WALDO CANYON BURN SCAR WILL NEED TO BE WATCHED THIS EVENING AS SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE INTO THE REGION. ONLY .01" HAS BEEN REPORTED THUS FAR NEAR THE BURN SCAR AT WEST MONUMENT CREEK. FRIDAY...MODELS AGREE THE LOW WILL CONTINUE TO TRACK ACROSS SOUTHERN COLORADO WITH THE GREATEST LIFT BEING AHEAD OF THE LOW ACROSS THE EASTERN PLAINS. THE GFS AND NAM SHOW WEAK 0-6 KM OF BULK SHEAR ACROSS THE EASTERN PLAINS AFTER 18Z. THE GFS SHOWS 1000-1400 J/KG OF SBCAPE WHILE THEN NAM12 HAS 800-1200 J/KG. HEAVY DOWNPOURS WILL BE THE PRIMARY CONCERN FROM THESE STORMS DUE TO THE LACK OF SHEAR...BUT SOME SMALL HAIL WILL BE POSSIBLE. HEAVY DOWNPOURS WILL ALSO BE POSSIBLE ACROSS THE REST OF THE FORECAST AREA AS SCATTERED SHOWERS ARE AGAIN LIKELY ACROSS THE HIGHER TERRAIN. THEN NAM12 SHOWS THE MOST QPF OVER THE REGION WHILE THE GFS TARGETS THE EASTERN PLAINS WITH ONLY LIGHT QPF ELSEWHERE. A BLEND OF THE TWO SEEMS REASONABLE AND HAVE NUMEROUS POPS IN THE HIGHER ELEVATIONS WITH SCATTERED POPS ELSEWHERE. THE WALDO CANYON BURN SCAR WILL AGAIN BE A CONCERN TOMORROW AS SHOWERS AND THUNDERSTORMS DEVELOP IN THE AREA. .LONG TERM... (FRIDAY NIGHT THROUGH THURSDAY) FRI NIGHT THE UPR TROF WL MOVE INTO KS AND THE TX PANHANDLE...WITH MSTR AND THEREFORE PCPN CHANCES OVR THE FORECAST AREA...DECREASING. HOWEVER...THERE COULD STILL BE SOME SHOWERS OR ISOLD TSTMS OVR SRN PORTIONS OF THE FORECAST AREA INTO SAT MORNING. BY MIDDAY SAT A FRONT WL DROP INTO THE SERN PLAINS...BRINGING NORTHERLY WINDS TO BEGIN WITH...WHICH WL THEN SWING AROUND TO AN EASTERLY DIRECTION. DURING THE DAY SATURDAY...AN UPR RIDGE WL BUILD OVR THE AREA...THAT WILL REMAIN IN PLACE THRU AT LEAST MONDAY. EVEN THOUGH THE MSTR OVR THE AREA WL NOT BE AS PLENTIFUL AS IT IS TODAY OR WILL BE ON FRI...THERE WL STILL BE ENOUGH FOR ISOLD TO SCATTERED SHOWERS AND STORMS...BOTH DAYS...ESPECIALLY OVR THE MTS AND HIGH VALLEYS. THERE ARE SOME MODEL DIFFERENCES THEREAFTER. THE GFS KEEPS THE UPR RIDGE OVR THE AREA...BEING CENTERED NR THE FOUR CORNERS ON TUE AND WED WITH PCPN CHANCES BEING OVR THE MTS. THE ECMWF PUSHES THE RIDGE CENTER EASTWARD AND FLATTENS THE RIDGE OVR THE AREA...ALLOWING SOME MSTR TO MOVE OVR ERN CO...AS AN UPR TROF MOVE OVR THE NRN U.S. ROCKIES...WHEREAS THE GFS IS SLOWER BRINGING THIS FEATURE ACRS THAT AREA...AND THUS THE ERN PLAINS STAY DRY. && .AVIATION... THE POTENTIAL FOR SHRA/TSRA AT AND NEAR TAF SITES WILL CONTINUE TO BE THE MAIN CONCERN FOR THE REST OF TONIGHT THROUGH THE DAY TOMORROW...AS SUBTROPICAL MOISTURE REMAINS IN PLACE ACROSS THE AREA...ALONG WITH AN UPPER LEVEL DISTURBANCE MOVING ACROSS THE STATE. STORMS AND ASSOCIATED OUTFLOW BOUNDARIES WILL BE POSSIBLE FOR ALL TAF SITES THROUGH 04Z...WITH BRIEF MVFR CONDITIONS...LOCALLY HEAVY RAIN SHOWERS...AND WIND GUSTS TO 35 KTS POSSIBLE. AFTER 04Z...THE THREAT FOR STORMS SHOULD GENERALLY DECREASE WITH THE LOSS OF SOLAR HEATING...HOWEVER...CANNOT RULE OUT A FEW SHOWERS PERSISTING THROUGH THE NIGHT. SHOWERS WILL LIKELY DEVELOP LATE FRIDAY MORNING ALONG WITH SOME THUNDERSTORMS BY THE AFTERNOON IN AND AROUND ALS...COS...AND PUB. BRIEF MVFR...LOCALLY HEAVY RAINFALL AND WIND GUSTS TO 35KTS WILL AGAIN BE POSSIBLE. && .PUB WATCHES/WARNINGS/ADVISORIES... NONE. && 81/28
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE PUEBLO CO 1148 AM MDT THU AUG 23 2012 COZ058>089-093>099-241800- WESTERN MOSQUITO RANGE/EAST LAKE COUNTY ABOVE 11000 FT- LEADVILLE VICINITY/LAKE COUNTY BELOW 11000 FT- EASTERN SAWATCH MOUNTAINS ABOVE 11000 FT- WESTERN CHAFFEE COUNTY BETWEEN 9000 AND 11000 FT- CENTRAL CHAFFEE COUNTY BELOW 9000 FT- WESTERN MOSQUITO RANGE/EAST CHAFFEE COUNTY ABOVE 9000 FT- SAGUACHE COUNTY WEST OF CONTINENTAL DIVIDE BELOW 10000 FT- SAGUACHE COUNTY EAST OF CONTINENTAL DIVIDE BELOW 10000 FT- LA GARITA MOUNTAINS ABOVE 10000 FT- UPPER RIO GRANDE VALLEY/EASTERN SAN JUAN MOUNTAINS BELOW 10000 FT- EASTERN SAN JUAN MOUNTAINS ABOVE 10000 FT- DEL NORTE VICINITY/NORTHERN SAN LUIS VALLEY BELOW 8500 FT- ALAMOSA VICINITY/CENTRAL SAN LUIS VALLEY BELOW 8500 FT- SOUTHERN SAN LUIS VALLEY- NORTHERN SANGRE DE CRISTO MOUNTAINS BETWEEN 8500 AND 11000 FT- NORTHERN SANGRE DE CRISTO MOUNTAINS ABOVE 11000 FEET- SOUTHERN SANGRE DE CRISTO MOUNTAINS BETWEEN 7500 AND 11000 FT- SOUTHERN SANGRE DE CRISTO MOUNTAINS ABOVE 11000 FT- NORTHWESTERN FREMONT COUNTY ABOVE 8500 FT- WESTERN/CENTRAL FREMONT COUNTY BELOW 8500 FT- WET MOUNTAIN VALLEY BELOW 8500 FEET- WET MOUNTAINS BETWEEN 6300 AND 10000 FT- WET MOUNTAINS ABOVE 10000 FT- TELLER COUNTY/RAMPART RANGE ABOVE 7500 FT/PIKES PEAK BETWEEN 7500 AND 11000 FT-PIKES PEAK ABOVE 11000 FT- CANON CITY VICINITY/EASTERN FREMONT COUNTY- NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT- COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW 7400 FT-PUEBLO AND VICINITY/PUEBLO COUNTY BELOW 6300 FT- WALSENBURG VICINITY/UPPER HUERFANO RIVER BASIN BELOW 7500 FT- TRINIDAD VICINITY/WESTERN LAS ANIMAS COUNTY BELOW 7500 FT- CROWLEY COUNTY-LA JUNTA VICINITY/OTERO COUNTY- EASTERN LAS ANIMAS COUNTY-WESTERN KIOWA COUNTY- EASTERN KIOWA COUNTY-LAS ANIMAS VICINITY/BENT COUNTY- LAMAR VICINITY/PROWERS COUNTY-SPRINGFIELD VICINITY/BACA COUNTY- 1148 AM MDT THU AUG 23 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL...EAST CENTRAL...SOUTH CENTRAL AND SOUTHEAST COLORADO. .DAY ONE...THIS AFTERNOON AND TONIGHT A SLOW MOVING UPPER LEVEL DISTURBANCE WILL BRING A GOOD SUPPLY OF MONSOONAL MOISTURE TO THE AREA TODAY. THE WATER AVAILABLE IN THE ATMOSPHERE FOR PRECIPITATION IS AT ITS HIGHEST LEVEL IN THE PAST FEW DAYS...WITH OVER AN INCH AVAILABLE AT MOST LOCATIONS. CONSEQUENTLY...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ACROSS THE HIGH VALLEYS AND PLAINS TODAY...WITH EVEN MORE WIDESPREAD ACTIVITY EXPECTED OVER THE HIGHER TERRAIN. DUE TO AMPLE SUBTROPICAL MOISTURE AND LIGHT STEERING WINDS ALOFT... THERE WILL BE AN ELEVATED RISK OF STORMS PRODUCING HEAVY RAIN AND FLASH FLOODING THIS AFTERNOON AND EVENING. CLOSE MONITORING OF CONDITIONS ACROSS THE WALDO CANYON FIRE SCAR WILL BE REQUIRED SHOULD A STORM DEVELOP OVER THAT AREA. THE POTENTIAL EXISTS FOR SHORT DURATION RAINFALL AMOUNTS EXCEEDING A HALF INCH OVER THE WALDO CANYON SCAR THIS AFTERNOON AND EVENING WHICH IS THE GENERAL GUIDELINE FOR ISSUING A FLASH FLOOD WARNING. SHOWERS AND THUNDERSTORMS SHOULD GENERALLY DECREASE OVER THE AREA THROUGH THE EVENING HOURS. HOWEVER...UPPER LEVEL LOW PRESSURE TRACKING SLOWLY EAST ALONG THE SOUTHERN COLORADO BORDER MAY ALLOW A FEW STORMS TO PERSIST THROUGH THE NIGHT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A SLOW MOVING UPPER LEVEL STORM SYSTEM WILL CONTINUE TO DRAW A RICH PLUME OF MONSOONAL MOISTURE ACROSS SOUTHERN COLORADO INTO AT LEAST FRIDAY EVENING...ALLOWING INCREASED SHOWER AND THUNDERSTORM ACTIVITY AS WELL AS LOCALIZED HEAVY RAIN POTENTIAL AT TIMES. WITH THE SUBTROPICAL ORIGIN OF THE MOISTURE AS WELL AS THE SLOW MOVEMENT OF THE UPPER LEVEL SYSTEM...THE THREAT OF FLASH FLOODING WILL CONTINUE TO BE ELEVATED FROM FRIDAY INTO FRIDAY EVENING...ESPECIALLY FOR AREAS IN AND NEAR THE WALDO CANYON FIRE SCAR. THEN FROM SATURDAY INTO WEDNESDAY...UPPER HIGH PRESSURE IS EXPECTED TO REDEVELOP OVER SOUTHERN COLORADO...ALLOWING THE MAJORITY OF SHOWER AND THUNDERSTORM ACTIVITY TO BE FOCUSED OVER HIGHER TERRAIN AREAS. IN ADDITION...THE THREAT OF FLASH FLOODING IS EXPECTED TO DECREASE...HOWEVER ENOUGH SUBTROPICAL MOISTURE SHOULD BE AVAILABLE TO ALLOW LOCALIZED FLASH FLOODING CONCERNS...ONCE AGAIN PRIMARILY OVER HIGHER TERRAIN LOCATIONS. .SPOTTER INFORMATION STATEMENT... WEATHER CONDITIONS THAT MEET REPORTING CRITERIA FOR SPOTTERS WILL BE POSSIBLE THIS AFTERNOON AND EVENING OVER MUCH OF THE AREA. 81/81
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PUEBLO CO 125 PM MDT THU AUG 23 2012 COZ081-082-084-085-2312000- COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW 7400 FT-NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT-PIKES PEAK ABOVE 11000 FT-TELLER COUNTY/RAMPART RANGE ABOVE 7500FT/PIKE'S PEAK BETWEEN 7500 AND 11000 FT- 125 PM MDT THU AUG 23 2012 ...THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... EAST CENTRAL TELLER COUNTY IN CENTRAL COLORADO... WEST CENTRAL EL PASO COUNTY IN EAST CENTRAL COLORADO... THIS INCLUDES...WALDO CANYON BURN SCAR AT 120 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM NEAR GREEN MOUNTAIN FALLS...OR 15 MILES WEST OF COLORADO SPRINGS...WHICH WAS MOVING TOWARD THE NORTHEAST AT 10 MPH. LOCATIONS IMPACTED INCLUDE... GREEN MOUNTAIN FALLS. CRYSTOLA. CHIPITA PARK. CASCADE. NORTHERN PORTIONS OF THE WALDO CANYON BURN SCAR. GENERALLY LIGHT RAIN IS EXPECTED WITH THIS STORM AS IT MOVES SLOWLY NORTHEASTWARD ACROSS THE WALDO CANYON BURN SCAR. RAINFALL AMOUNTS RANGING FROM A FEW HUNDREDTHS TO ONE TENTH OF AN INCH WILL BE POSSIBLE...WITH THE GREATEST AMOUNTS ACROSS NORTHERN AND WESTERN PORTIONS OF THE SCAR. BE PREPARED TO TAKE SHELTER IN THE EVENT THESE STORMS INTENSIFY AND BECOME SEVERE...OR A WARNING IS ISSUED BY THE NATIONAL WEATHER SERVICE.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PUEBLO CO 335 PM MDT THU AUG 23 2012 COZ084-085-232245- NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT- COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW 7400 FT- INCLUDING THE CITIES OF...BLACK FOREST...AIR FORCE ACADEMY... COLORADO SPRINGS 335 PM MDT THU AUG 23 2012 ...THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... WEST CENTRAL EL PASO COUNTY IN EAST CENTRAL COLORADO... THIS INCLUDES...THE WALDO CANYON BURN SCAR AT 325 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT RAINFALL OVER THE WALDO CANYON BURN SCAR...WITH STRONGER STORMS REMAINING NORTHWESTERN AND SOUTHWESTERN TELLER COUNTY. LOCATIONS IMPACTED INCLUDE... THE WALDO CANYON BURN SCAR. LIGHT RAINFALL OF GENERALLY LESS THAN ONE TENTH OF AN INCH WILL BE POSIBLE ACROSS THE WALDO CANYON BURN SCAR THROUGH 430 PM. RAINFALL OF SEVEN HUNDREDTHS OF AN INCH HAS BEEN REPORTED AT THE RAMPART RANGE SENSOR OVER THE PAST HOUR...WITH TWO HUNDREDTHS OF AN INCH OF RAIN REPORTED AT THE WEST MONUMENT CREEK SENSOR NEAR THE AIR FORCE ACADEMY. BE PREPARED TO TAKE SHELTER IN THE EVENT THESE STORMS INTENSIFY AND BECOME SEVERE...OR A WARNING IS ISSUED BY THE NATIONAL WEATHER SERVICE.
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE PUEBLO CO 336 PM MDT THU AUG 23 2012 COZ084-085-232300- NORTHERN EL PASO COUNTY/MONUMENT RIDGE/RAMPART RANGE BELOW 7500 FT- COLORADO SPRINGS VICINITY/SOUTHERN EL PASO COUNTY/RAMPART RANGE BELOW 7400 FT- INCLUDING THE CITIES OF...BLACK FOREST...AIR FORCE ACADEMY... COLORADO SPRINGS 336 PM MDT THU AUG 23 2012 ...THE NATIONAL WEATHER SERVICE IN PUEBLO HAS ISSUED A SIGNIFICANT WEATHER ADVISORY FOR... WEST CENTRAL EL PASO COUNTY IN EAST CENTRAL COLORADO... THIS INCLUDES...THE WALDO CANYON BURN SCAR AT 325 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED LIGHT RAINFALL OVER THE WALDO CANYON BURN SCAR...WITH STRONGER STORMS MOVING ACROSS NORTHWESTERN AND SOUTHWESTERN TELLER COUNTY. LOCATIONS IMPACTED INCLUDE... THE WALDO CANYON BURN SCAR. LIGHT RAINFALL OF GENERALLY LESS THAN ONE TENTH OF AN INCH WILL BE POSIBLE ACROSS THE WALDO CANYON BURN SCAR THROUGH 430 PM. RAINFALL OF SEVEN HUNDREDTHS OF AN INCH HAS BEEN REPORTED AT THE RAMPART RANGE SENSOR OVER THE PAST HOUR...WITH TWO HUNDREDTHS OF AN INCH OF RAIN REPORTED AT THE WEST MONUMENT CREEK SENSOR NEAR THE AIR FORCE ACADEMY. BE PREPARED TO TAKE SHELTER IN THE EVENT THESE STORMS INTENSIFY AND BECOME SEVERE...OR A WARNING IS ISSUED BY THE NATIONAL WEATHER SERVICE.
The Goodland radar (KGLD), 115 km away, was scanning. The volume nearest the first event began at 23:21 UTC.
1 tornado. Local standard time, as filed.
A landspout over farm fields caused no damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2012Every state in 2012This day in weather historyThe tornado archive for Colorado, 2012Warnings in Colorado, August 2012
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 403691.