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NOUS45 KCYS 272006
PNSCYS
NEZ002-003-019>021-054-055-095-096-WYZ101>119-280806-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
206 PM MDT MON JUL 27 2026
.KEY MESSAGES…
- A PLUME OF MONSOON MOISTURE WILL ARRIVE TODAY, MODERATING
TEMPERATURES AND IMPROVING RAINFALL CHANCES THROUGH WEDNESDAY.
- MARGINAL TO SLIGHT RISK OF SEVERE THUNDERSTORMS MONDAY THROUGH
WEDNESDAY. STRONG GUSTY WINDS WILL BE THE PRIMARY THREAT.
- HEAVY RAINFALL AND LOCALIZED FLASH FLOODING POSSIBLE TUESDAY
THROUGH WEDNESDAY NIGHT.
MORE HEAT RETURNS FOR THURSDAY THROUGH MONDAY, WITH SOME NEAR
RECORD HIGH TEMPERATURES POSSIBLE FOR SOME LOCATIONS AND POSSIBLE
HEAT ADVISORIES.
SHORT TERM…
TONIGHT…WSR-88D RADAR REFLECTIVITY LOOP AND MODEL ANALYSIS SHOWS
SCATTERED TO POSSIBLE NUMEROUS SHOWERS, ISOLATED TO SCATTERED
THUNDERSTORMS CONTINUING THROUGH EARLY EVENING, MAINLY EAST OF I-25.
MODEL TRENDS SHOW SHOWERS AND SOME THUNDERSTORMS DECREASING LATER
TONIGHT. CLOUD COVER WILL MINIMIZE COOLING, ACTING LIKE A BLANKET EFFECT.
THE STORM PREDICTION CENTER HAS REDUCED THE MARGINAL AND SLIGHT RISK
AREA FOR THIS AFTERNOON AND THIS EVENING WHICH SEEMS QUITE PLAUSIBLE
DUE TO EXTENSIVE CLOUD COVER AND REDUCED INSTABILITY.
STORM MOVEMENT WILL BE ENOUGH TO MINIMIZE HEAVY RAIN THREAT.
TUESDAY…LOOKS LIKE A MORE FAVORABLE DAY FOR SCATTERED TO NUMEROUS
SHOWERS AND SCATTERED THUNDERSTORMS, ESPECIALLY WITH RESPECT TO THUNDERSTORM
INTENSITY DUE TO MORE SOLAR INSOLATION, BETTER LOW LEVEL MOISTURE
SUPPLY AND INCREASED SHEAR PARAMETERS, AS EVIDENCED BY BULK SHEAR
VALUES AND PROJECTED 850/700 THETA-E RIDGE AXIS PLACEMENT.
CONCUR WITH THE STORM PREDICTION CENTER DAY 2 OUTLOOK SHOWING MARGINAL
RISK OF SEVERE THUNDERSTORMS TO THE RIGHT OF A LINE FROM LARAMIE TO
TORRINGTON TO SCOTTSBLUFF. MARGINAL RISK OF FLASH FLOODING LOOKS MORE
LIKELY DUE TO WEAKER STEERING LEVEL WINDS AROUND 700 MB, 10,000 FEET MSL.
WEDNESDAY…POSITIONING OF DECENT 850/700 THETA-E RIDGE AXIS, AND THE
PROXIMITY OF A MORE DECENT SHORTWAVE TROUGH ALOFT NEAR PEAK HEATING,
AT LEAST FOR LATE JULY, AND THE PRECIPITABLE WATER (PWAT) VALUES FROM
1.5 TO 2 INCHES, ALONG WITH IMPRESSIVE SHEAR AND INSTABILITY SUGGESTS
ANOTHER ROUND OF SCATTERED TO NUMEROUS AFTERNOON AND EVENING SHOWERS
AND SCATTERED THUNDERSTORMS, WITH A MARGINAL RISK OF SEVERE
THUNDERSTORMS TO THE RIGHT OF A LINE FROM LARAMIE TO CASPER IN THE
AFTERNOON AND EVENING FROM THE METEOROLOGISTS AT THE SPC, STORM
PREDICTION CENTER.
THURSDAY THROUGH MONDAY…MONSOONAL MOISTURE RETREATS OUT OF OUR COUNTY
WARNING AREA (CWA) AS A DRIER AND HOTTER AIRMASS RETURNS PRODUCING
NEARLY DRY CONDITIONS WITH ONLY MINIMAL CHANCES FOR ISOLATED TO WIDELY
SCATTERED THUNDERSTORMS OVER AND NEAR OUR SNOWY, SIERRA MADRE AND
LARAMIE RANGES DUE TO DIFFERENTIAL OROGRAPHIC PROCESSES. TEMPERATURES
WILL SOAR ONCE AGAIN, ESPECIALLY FOR SUNDAY AND MONDAY, WITH SOME
LOCATIONS POSSIBLY APPROACHING NEAR RECORD MAXIMUM TEMPERATURES,
AND PERHAPS THE LONG STANDING ALL TIME RECORD HIGH TEMPERATURE
OF 100 DEGREES AT CHEYENNE, THAT HAS BEEN ACHIEVED FOUR TIMES, THE
MOST RECENT IN THE 1950S. -RUBIN
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