Tornado Warning 5, NWS Cheyenne, WY

WYZALL-272035-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1235 PM MDT MON MAY 27 1991

THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER WYOMING AGAIN THIS AFTERNOON.
SOME STORMS...ESPECIALLY OVER THE CENTRAL AND SOUTH WILL BECOME STRONG
WITH HAIL...STRONG WINDS...HEAVY RAIN AND FREQUENT LIGHTNING STRIKES.
ALREADY HAIL HAS BEEN OBSERVERED WITH THUNDERSTORMS IN WESTERN WYOMING.

STORMS WILL CONTINUE THROUGH THE AFTERNOON AND EVENING OVER MUCH OF
THE STATE AND LIKELY INTO THE NIGHT OVER PARTS OF EASTERN WYOMING.

PEOPLE PLANNING OUTDOOR ACTIVITIES ON THIS MEMORIAL DAY SHOULD BE
AWARE OF THE DANGER OF STRONG THUNDERSTORMS.

CAMPERS AND HIKERS NEED TO BE PREPARED TO MOVE TO HIGHER GROUND TODAY.
THE ADDITIONAL RAINFALL WILL JUST ADD TO THE ALREADY HIGH WATER
IN MANY RIVERS AND STREAMS. IN ADDITION...MINOR FLOODING HAS OCCURRED
FOR THE EPAST SEVERAL DAYS AND WILL AGAIN BE POSSIBLE TODAY. BOATERS
SHOULD ALSO BE CAUTIOUS ABOUT VENTURING OUT ON LAKES DURING THE
AFTERNOON.
SCOTT

WYZALL-272035-

SPECIAL WEATHER STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
1240 PM MDT MON MAY 27 1991

THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER WYOMING AGAIN THIS AFTERNOON.
SOME STORMS...ESPECIALLY OVER THE CENTRAL AND SOUTH WILL BECOME STRONG
WITH HAIL...STRONG WINDS...HEAVY RAIN AND FREQUENT LIGHTNING STRIKES.
ALREADY HAIL HAS BEEN OBSERVERED WITH THUNDERSTORMS IN WESTERN WYOMING.

STORMS WILL CONTINUE THROUGH THE AFTERNOON AND EVENING OVER MUCH OF
THE STATE AND LIKELY INTO THE NIGHT OVER PARTS OF EASTERN WYOMING.

PEOPLE PLANNING OUTDOOR ACTIVITIES ON THIS MEMORIAL DAY SHOULD BE
AWARE OF THE DANGER OF STRONG THUNDERSTORMS.

CAMPERS AND HIKERS NEED TO BE PREPARED TO MOVE TO HIGHER GROUND TODAY.
THE ADDITIONAL RAINFALL WILL JUST ADD TO THE ALREADY HIGH WATER
IN MANY RIVERS AND STREAMS. IN ADDITION...MINOR FLOODING HAS OCCURRED
FOR THE PAST SEVERAL DAYS AND WILL AGAIN BE POSSIBLE TODAY. BOATERS
SHOULD ALSO BE CAUTIOUS ABOUT VENTURING OUT ON LAKES DURING THE
AFTERNOON.
SCOTT

WYZALL-272135-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
142 PM MDT MON MAY 27 1991

...THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WATCH FOR THE
SOUTHEAST QUARTER OF WYOMING UNTIL 9 PM THIS EVENING...

I AM CERTAIN THAT RESIDENTS OF SOUTHEAT WYOMING FEALT THE HIGH HUMIDITY
OVER THE AREA THIS MORRNING.  DAYTIME HEATING HAS STARTED TO WORK WITH
THIS MOISTURE CAUSING CLOUDS TO BEGIN BUILDING THE AFTERNOONS EXPECTED
THUNDERSTORMS.  SURFACE WINDS OVER SOUTHEAST WYOMING ARE FROM THE
SOUTHEAST TO EAST AT 15 TO 20 MILES AN HOUR.  THIS IS AN UPSLOPE FLOW
WHICH FEEDS ADDITIONAL GULF MOISTURE INTO THE STATE.  THE UPPER LEVEL
WINDS ARE FROM THE SOUTHWEST AND RATHER STRONG.  THIS DIFFERENCE IN
SURFACE WIND DIRECTION COMPARED TO THE UPPER LEVEL WIND FLOW ADDS
THE NECESSARY WIND SHEAR NEEDED FOR THE FORMATION OF TORNADOES.

THE TORNADO WATCH ISSUED BY THE NATIONAL WEATHER SERVICE FOR SOUTHEAST
WYOMING IS VALID FROM 2 PM THIS AFTERNOON TO 9 PM THIS EVENING.
THE CITIES OF CASPER...DOUGLAS...LUSK...WHEATLAND...TORRINGTON...
RAWLINS....LARAMIE...CHEYENNE AND PINE BLUFFS ARE  INCLUDED IN
THIS TORNADO WATCH.

NOW IS THE TIME FOR RESIDENTS OF SOUTHEAST WYOMING TO REVIEXW THEIR
TORNADO SAFETY RULES SO THAT QUICK ACTION CAN BE TAKEN IF THREATENED
BY A TORNADO.  SEVERE THUNDERSTORMS THAT SPAWN TORNADOES MAY ALSO
PRODUCE LARGE HAIL AND HEAVY RAINS.
LAUZE

WYZ013-014-272135-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
208 PM MDT MON MAY 27 1991

...STRONG THUNDERSTORMS HAVE DEVELOPED OVER THE SOUTHWEST CORNER
WYOMING...

RADAR AND LIGHTNING DETECTORS INDICATED THAT STRONG THUNDERSTORMS
HAD DEVELOPED OVER SOUTHWEST WYOMING FROM NEAR EVANSTON TO NORTHWEST
OF ROCK SPRINGS.  THE UPPER LEVEL WINDS SHOULD STEAR THE THUNDERSTORMS
TO THE NORTHEAST AT ABOUT 30 MILES AN HOUR.

RESIDENTS OF SOUTHWEST WYOMING SHOULD BE ON THE ALERT FOR STORNG
THUNDERSTORMS THIS AFTERNOON.  IF SEVERE WEATHER IS ENCOUNTERED...
SEEK SHELTER IN DOORS AND RELAY YOUR SEVERE WEATHER REPORT TO
THE NATIONAL WEATHER SERVICE IN CHEYENNE THROUGH YOUR NEAREST LAW
ENFORCEMENT AGENCY.
LAUZE

WYZ012-272200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
320 PM MDT MON MAY 27 1991

...TORNADO WATCH FOR SOUTHEAST WYOMING VALID UNTIL 9 PM THIS EVENING...

RADAR INDICATED A STRONG THUNDERSTORMS 10 MILES NORTH OF WHEATLAND
MOVING TO THE NORTHEAST AT 25 MILES AN HOUR.

RESIDENTS OF HARTVILLE AND GUERNSEY SHOULD KEEP AN EYE ON THE SKY
FOR THE APPROACHING THUNDERSTORM UNTIL 4 PM.  IF SEVERE WEATHER IS
ENCOUNTERED...SEEK SHELTER IN DOORS AND RELAY YOUR SEVERE WEATHER
REPORT TO THE NATIONAL WEATHER SERVICE IN CHEYENNE THROUGH YOUR
NEAREST LAW ENFORCEMENT AGENCY.
LAUZE

WYZ011-012-014-015-016-017-272300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
345 PM MDT MON MAY 27 1991

...A TORNADO WATCH FOR SOUTHEAST WYOMING REMAINED IN EFFECT UNTIL 9 PM
THIS EVENING...

THERE HAS NOT BEEN ANY REPORTS OF SEVERE THUNDERSTORMS OR TORNADOES
IN THE WATCH AREA YET.  THE TORNADO WATCH IN EFFECT UNTIL 9 PM FOR
SOUTHEAST WYOMING INCLUDES THE SOUTHERN HALF OF NATRONA...CONVERSE AND
NIOBRARA COUNTIES AND ALL OF CARBON..ALBANY...LARAMIE...PLATTE AND
GOSHEN COUNTIES.

RADAR DID HOWEVER SHOW THUNDERSTORMS DEVELOPING IN THE WATCH AREA.
THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 25 MILES AN HOUR.

RESIDENTS OF SOUTHEAST WYOMING SHOULD KEEP AN EYE ON THE SKY AND
SHOULD KEEP ABREST OF THE LATEST WEATHER DEVELOPMENTS.  SHOULD SEVERE
WEATHER THREATEN...SEEK SHELTER AND WHEN SAFE THEN RELAY YOUR REPORT
TO THE NATIONAL WEATHER SERVICE THROUGH THE NEAREST LAW ENFORCEMENT
AGENCY.
LAUZE