Tornado Warning 5, NWS Des Moines, IA

IAZ004-202200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
210 PM CST MON APR 20 1992

...A WINTER STORM WATCH IS IN EFFECT FOR EXTREME NORTHWEST IOWA
   TONIGHT AND TUESDAY...

WINTER WEATHER IS EXPECTED TO RETURN TO A SMALL PART OF IOWA TONIGHT
AND TUESDAY.  THE WATCH AREA IS TO THE WEST OF A LINE FROM AROUND 30
MILES WEST OF SPENCER TO 20 MILES WEST OF DENISON.  TWO TO SIX INCHES
OF SNOW IS EXPECTED IN THE WATCH AREA TONIGHT...WITH ADDITIONAL
ACCUMULATION POSSIBLE TUESDAY.

EARLY THIS AFTERNOON...A MIXTURE OF RAIN...SLEET AND SNOW HAD MOVED
INTO THE SIOUX CITY AREA.  THIS WAS ON THE NORTHERN END OF A NARROW
BAND OF WINTER PRECIPITATION THAT EXTENDED ALONG AND TO THE WEST OF
THE MISSOURI RIVER IN EXTREME WESTERN IOWA...EASTERN NEBRASKA...AND
NORTHEAST KANSAS.  TEMPERATURES AFTER NOON HOVERED NEAR THE FREEZING
MARK IN THIS AREA...WHICH EXPLAINS THE MESSY MIXTURE.

AS THE DAY WEARS ON...TEMPERATURES IN THIS AREA WILL FALL SLIGHTLY
...RESULTING IN THE PRECIPITATION CHANGING OVER TO ALL SNOW.  AN UPPER
ATMOSPHERIC WEATHER DISTURBANCE MOVING NORTH OUT OF THE SOUTHERN
PLAINS WILL COMBINE WITH THE COLD TEMPERATURES AND ABUNDANT MOISTURE
IN PLACE OVER THE REGION TO PRODUCE A HEAVY...WET SNOW ACROSS PARTS OF
EXTREME NORTHWEST IOWA...INTO EASTERN SECTIONS OF SOUTH DAKOTA AND
NEBRASKA.

IN ADDITION TO THE HEAVY SNOW THAT IS EXPECTED TO FALL TONIGHT AND
TUESDAY...STRONG NORTHERLY WINDS OF 15 TO 30 MILES AN HOUR WILL CAUSE
BLOWING AND DRIFTING SNOW.  THIS WILL CREATE VERY DANGEROUS DRIVING
CONDITIONS...ESPECIALLY IN RURAL AREAS.

IF YOU PLAN TO TRAVEL IN NORTHWEST IOWA TONIGHT OR TUESDAY...KEEP
ABREAST OF THE LATEST FORECASTS...CURRENT WEATHER CONDITIONS AND ROAD
REPORTS BEFORE VENTURING OUT.

SULLIVAN

IAZALL-210000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
430 PM CST MON APR 20 1992

...WINTER STORM WARNING FOR PARTS OF EXTREME WEST CENTRAL IOWA TONIGHT
AND TUESDAY...
...WEATHER ADVISORY MUCH OF WESTERN ONE QUARTER OF IOWA TONIGHT AND
TUESDAY...

A WINTER STORM WARNING WILL BE IN EFFECT FOR PARTS OF EXTREME WEST
CENTRAL IOWA TONIGHT INTO TUESDAY.  SOME CITIES INCLUDED IN THIS
WARNING ARE ONAWA...SIOUX CITY...AND LEMARS.  3 TO 7 INCHES OF SNOW
COULD ACCUMULATE IN THESE AREAS TONIGHT WITH AN ADDITIONAL 3 TO 5
INCHES POSSIBLE ON TUESDAY.

A WEATHER ADVISORY WILL BE IN EFFECT FOR MUCH OF THE WESTERN ONE
QUARTER OF IOWA TONIGHT AND TUESDAY.  THE ADVISORY INCLUDES THAT AREA
MAINLY WEST OF HIGHWAY 71.  SOME CITIES INCLUDED IN THE ADVISORY ARE
SHENANDOAH...ATLANTIC...CARROLL...STORM LAKE...AND SPENCER.

SNOW AMOUNTS IN THE ADVISORY COULD REACH ANYWHERE FROM 3 TO 6
INCHES TONIGHT.  ON TUESDAY ADDITIONAL AMOUNTS OF 2 TO 4 INCHES
COULD ACCUMULATE IN NORTHWEST IOWA AND 1 TO 2 INCHES IN SOUTHWEST
IOWA.  IN ADDITION SOME LOCATIONS IN THE ADVISORY AREA COULD GET
SOME FREEZING RAIN OR SLEET TONIGHT.

AT 400 PM SNOW WAS OCCURRING IN THE SHENANDOAH...OMAHA...COUNCIL
BLUFFS AREA AS WELL AS SIOUX CITY.  SHENANDOAH AND SIOUX CITY
REPORTED ONE INCH OF WET SNOW WITH TWO INCHES AT OMAHA.

THE LOW PRESSURE AREA RESPONSIBLE FOR THIS INCLEMENT SPRING WINTER
WEATHER WAS OVER NORTH CENTRAL MISSOURI AROUND 400 PM.  THE LOW WILL
MOVE NORTH ACROSS CENTRAL IOWA AND BE LOCATED IN THE VICINITY OF
MASON CITY BY DAYBREAK ON TUESDAY.

IN ADDITION WINTER STORM WARNINGS WILL BE IN EFFECT FOR EASTERN
NEBRASKA AND SOUTHEAST SOUTH DAKOTA.  A WEATHER ADVISORY WILL BE
IN E|FFECT FOR SOUTHWEST MINNESOTA.

IF YOU PLAN TO TRAVEL INTO WESTERN IOWA AND ADJACENT AREAS OF
NEBRASKA...SOUTH DAKOTA...AND SOUTHWEST MINNESOTA BE SURE AND CHECK
THE LATEST FORECASTS AND ROAD CONDITIONS BEFORE DEPARTING.

JLA

IAZALL-202240-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DES MOINES IA
448 PM CDT MON APR 20 1992

...TORNADO WATCH UNTIL 10 PM THIS EVENING FOR SOUTHEAST IOWA...
...WINTER STORM WARNING FOR EXTREME WEST CENTRAL IOWA TONIGHT AND
   TUESDAY...
...WEATHER ADVISORY FOR WINTER WEATHER FOR WESTERN ONE-THIRD OF IOWA
   TONIGHT AND TUESDAY...
...FLOOD WATCH FOR ALL BUT NORTHWEST QUARTER OF IOWA TONIGHT...

AT 430 PM CDT...RADAR SHOWED A LARGE AREA OF RAINFALL OVER THE STATE OF
IOWA.  THE AREA WAS MAINLY SOUTH AND WEST OF A LINE FROM NEAR MASON CITY
TO NEAR IOWA CITY...THEN SOUTH INTO NORTHEAST MISSOURI ABOUT 30 MILES
WEST OF KEOKUK.  SURFACE OBSERVATIONS INDICATE THAT SNOW AND SLEET WERE
MIXED WITH THE RAIN IN THE WESTERN PART OF THE STATE.

THE INTENSITY OF THE PRECIPITATION HAD DECREASED SOMEWHAT DURING THE
PRECEDING HOUR AS THE AREA MOVED NORTH AT 30 MILES AN HOUR.

WHILE NO THUNDER HAD BEEN REPORTED IN IOWA AT 430 PM...THUNDERSTORMS ARE
EXPECTED TO DEVELOP IN THE SOUTHEAST CORNER OF THE STATE...AND A TORNADO
WATCH REMAINS IN EFFECT FOR THAT AREA UNTIL 10 PM.  ALSO...NEARLY THE
ENTIRE STATE HAS BEEN SATURATED FROM RAINS OF THE PAST FEW DAYS...AND
ANY NHEAVY RAIN THAT FALLS TONIGHT COULD CAUSE FLOODING OF LOW-LYING AREAS.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL RADIO OR TV STATIONS FOR THE
LATEST WEATHER STATEMENTS AND POSSIBLE WARNINGS.

SULLIVAN

IAZALL-202315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
520 PM CDT MON APR 20 1992

...TORNADO WATCH UNTIL 10 PM THIS EVENING FOR SOUTHEAST IOWA...
...WINTER STORM WARNING FOR EXTREME WEST CENTRAL IOWA TONIGHT AND
   TUESDAY...
...WEATHER ADVISORY FOR WINTER WEATHER FOR WESTERN ONE-THIRD OF IOWA
   TONIGHT AND TUESDAY...
...FLOOD WATCH FOR ALL BUT NORTHWEST QUARTER OF IOWA TONIGHT...

SNOW AND SLEET CONTINUED IN WESTERN IOWA JUST AFTER 5 PM CST...WHILE
THUNDERSTORMS WERE DEVELOPING IN THE SOUTHEAST PART OF THE STATE.

AT 505 PM...THE FREMONT COUNTY SHERIFFS DEPARTMENT REPORTED 6 INCHES OF
WET SNOW AT SIDNEY...ABOUT 40 MILES SOUTHEAST OF COUNCIL BLUFFS.  OTHER
REPORTS FROM SOUTHWEST AND WEST CENTRAL IOWA INDICATED GENERALLY LESS
THAN AN INCH ACCUMULATION IN MOST AREAS...BUT THAT ROADS WERE BECOMING
SLUSHY...AND VISIBILITY IN OPEN COUNTRY WAS AS LOW AS ONE HALF MILE.

AT 515 PM...RADAR SHOWED NEWLY DEVELOPED THUNDERSTORMS 15 MILES NORTH AND
10 MILES EAST OF OTTUMWA.  THESE STORMS WERE MOVING NORTH AT 30 MILES AN
HOUR.

A VARIETY OF WEATHER WILL CONTINUE TO OCCUR OVER IOWA THIS EVENING...
WITH SNOW AND BLOWING SNOW CREATING HAZARDOUS DRIVING CONDITIONS IN THE
WEST...AND THUNDERSTORMS CAPABLE OF BECOMING SEVERE IN THE SOUTHEAST.

IF YOU PLAN TO TRAVEL ANYWHERE IN IOWA TONIGHT...IT WOULD BE WISE TO
PHONE AHEAD AND FIND OUT THE LOCAL WEATHER CONDITIONS BEFORE YOU DEPART.
ALSO...LET SOMEONE KNOW THtE ROUTE YOU PLAN ON TAKING...SHOULD YOU
BECOME STRANDED FOR ANY REASON.

SULLIVAN