Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at May 27, 1993, 7:53 PM CDT for Marshall County, Iowa. It was in force for 27 min.
The area
The counties it named.
The facts
- Issued
- May 27, 1993, 7:53 PM CDT (00:53 UTC)
- Expired
- May 27, 1993, 8:20 PM CDT
- In force
- 27 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Marshall County, IA
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.9 hours before the alert went out and 291 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
- 1369 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 1893 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 7.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 280054 TORDSM IAC127-280120- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE DES MOINES IA 753 PM CDT THU MAY 27 1993 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 820 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION(S)... IN CENTRAL IOWA ...WESTERN MARSHALL COUNTY NATIONAL WEATHER SERVICE RADAR INDICATED A POSSIBLE TORNADO ALONG THE STORY...MARSHALL COUNTY BORDER...30 MILES NORTHEAST OF DES MOINES... ALONG HIGHWAY 30. ALSO...THERE HAS BEEN A REPORT OF A FUNNEL CLOUD AND GOLF BALL SIZE HAIL NEAR COLO IN STORY COUNTY. THIS SEVERE STORM WAS MOVING INTO WEST MARSHALL COUNTY AND WILL MOVE CLOSE TO THE COMMUNITIES OF STATE CENTER...ST. ANTHONY...AND RHODES BETWEEN 750 AND 815 PM. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. FELDT
What forecasters said that day
The local office's own words before this tornado 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 27, 7:20 PM CDT, 33 minutes before
IAZ060-280115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 720 PM CDT THU MAY 27 1993 ...STRONG THUNDERSTORMS COULD PUSH ACROSS THE DES MOINES AREA BETWEEN 730 AND 815 PM THIS EVENING... A LINE OF THUNDERSTORMS WAS LOCATED ABOUT 25 MILES NORTH OF DES MOINES AS OF 715 PM. ALTHOUGH THE INDIVIDUAL STORMS WERE MOVING EAST...THE LINE WAS TENDING TO SAG SOUTH. IT IS LIKELY THAT THESE THUNDERSTORMS COULD REACH NORTH PARTS OF THE DES MOINES METRO AREA BETWEEN 730 AND 815 PM. ALTHOUGH MORE LIKELY ACROSS NORTH SECTIONS...IT IS POSSIBLE THAT THE STORMS COULD MOVE NEAR THE DOWNTOWN AREA...INCLUDING SEC TAYLOR STADIUM...BETWEEN 815 AND 830 PM. A PERIOD OF HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING AND PERHAPS SOME HAIL CAN BE EXPECTED WITH THESE STORMS. FELDT
Special weather statement, May 27, 7:25 PM CDT, 28 minutes before
IAZ006>011-016>019-026>029-038>040-280130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 725 PM CDT THU MAY 27 1993 ...STRONG THUNDERSTORMS MOVING INTO GRUNDY COUNTY... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST AND NORTH CENTRAL IOWA UNTIL 10 PM TO THE EAST OF HIGHWAY 65. THE WATCH ALSO DOES NOT INCLUDE BUCHANAN COUNTY. AT 715 PM RADAR INDICATED STRONG THUNDERSTORM IN SOUTHEAST GRUNDY COUNTY BETWEEN WHITTEN AND GRUNDY CENTER. THESE STORMS WILL AFFECT THE GRUNDY CENTER AREA BY 730 PM AND DIKE BY 745 PM. THESE STORMS WILL LIKELY PRODUCE BRIEF DOWNPOURS... STRONG WINDS AND SMALL HAIL. ANOTHER AREA OF THUNDERSTORMS WAS JUST WEST OF WATERLOO AND WILL AFFECT THE WATERLOO AND WAVERLY AREAS THROUGH 8 PM. THESE STORMS WERE WEAKENING BUT STILL WILL PRODUCE BRIEF STRONG WINDS AND HEAVY DOWNPOURS. DP
Special weather statement, May 27, 7:27 PM CDT, 26 minutes before
IAZ006>011-016>019-026>029-038>040-280130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 725 PM CDT THU MAY 27 1993 ...STRONG THUNDERSTORMS MOVING INTO GRUNDY COUNTY... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST AND NORTH CENTRAL IOWA UNTIL 10 PM TO THE EAST OF HIGHWAY 65. THE WATCH ALSO DOES NOT INCLUDE BUCHANAN COUNTY. AT 715 PM RADAR INDICATED STRONG THUNDERSTORM IN SOUTHEAST GRUNDY COUNTY BETWEEN WHITTEN AND GRUNDY CENTER. THESE STORMS WILL AFFECT THE GRUNDY CENTER AREA BY 730 PM AND DIKE BY 745 PM. THESE STORMS WILL LIKELY PRODUCE BRIEF DOWNPOURS... STRONG WINDS AND SMALL HAIL. ANOTHER AREA OF THUNDERSTORMS WAS JUST WEST OF WATERLOO AND WILL AFFECT THE WATERLOO AND WAVERLY AREAS THROUGH 8 PM. THESE STORMS WERE WEAKENING BUT STILL WILL PRODUCE BRIEF STRONG WINDS AND HEAVY DOWNPOURS. DP
Special weather statement, May 27, 7:34 PM CDT, 19 minutes before
IAZ006>011-016>019-026>029-038>040-280130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 725 PM CDT THU MAY 27 1993 ...STRONG THUNDERSTORMS MOVING INTO GRUNDY COUNTY... A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR NORTHEAST AND NORTH CENTRAL IOWA UNTIL 10 PM TO THE EAST OF HIGHWAY 65. THE WATCH ALSO DOES NOT INCLUDE BUCHANAN COUNTY. AT 715 PM RADAR INDICATED STRONG THUNDERSTORM IN SOUTHEAST GRUNDY COUNTY BETWEEN WHITTEN AND GRUNDY CENTER. THESE STORMS WILL AFFECT THE GRUNDY CENTER AREA BY 730 PM AND DIKE BY 745 PM. THESE STORMS WILL LIKELY PRODUCE BRIEF DOWNPOURS... STRONG WINDS AND SMALL HAIL. ANOTHER AREA OF THUNDERSTORMS WAS JUST WEST OF WATERLOO AND WILL AFFECT THE WATERLOO AND WAVERLY AREAS THROUGH 8 PM. THESE STORMS WERE WEAKENING BUT STILL WILL PRODUCE BRIEF STRONG WINDS AND HEAVY DOWNPOURS. DP
Special weather statement, May 27, 7:45 PM CDT, 8 minutes before
IAZ060-280145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT THU MAY 27 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL INTO SOUTHWEST IOWA UNTIL 10 PM CDT... AT 733 PM CDT...VERY STRONG THUNDERSTORMS WERE OVER CENTRAL INTO NORTHEAST IOWA. THE STORMS WERE LOCATED IN A 15 MILE WIDE BAND CENTERED FROM 30 MILES NORTHWEST OF DES MOINES...NEAR PERRY TO 10 MILES WEST OF WATERLOO. THE STRONGEST STORM WAS 35 MILES NORTH NORTHEAST OF DES MOINES...NEAR NEVADA. THE STORM WAS PRODUCING FREQUENT DEADLY LIGHTNING...PEA TO MARBLE SIZE HAIL AND BRIEF VERY HEAVY RAIN. THESE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS THAT EXTENDED FROM CENTRAL INTO NORTHEAST IOWA. THE STORMS WERE IN A 40 MILE WIDE AREA THAT EXTENDED FROM 40 MILES SOUTHWEST OF DES MOINES...NEAR GREENFIELD TO 10 MILES NORTHEAST OF WATERLOO. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR. FILLBACH
Special weather statement, May 27, 7:51 PM CDT, 2 minutes before
IAZ060-280145- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT THU MAY 27 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL INTO SOUTHWEST IOWA UNTIL 10 PM CDT... AT 733 PM CDT...VERY STRONG THUNDERSTORMS WERE OVER CENTRAL INTO NORTHEAST IOWA. THE STORMS WERE LOCATED IN A 15 MILE WIDE BAND CENTERED FROM 30 MILES NORTHWEST OF DES MOINES...NEAR PERRY TO 10 MILES WEST OF WATERLOO. THE STRONGEST STORM WAS 35 MILES NORTH NORTHEAST OF DES MOINES...NEAR NEVADA. THE STORM WAS PRODUCING FREQUENT DEADLY LIGHTNING...PEA TO MARBLE SIZE HAIL AND BRIEF VERY HEAVY RAIN. THESE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS THAT EXTENDED FROM CENTRAL INTO NORTHEAST IOWA. THE STORMS WERE IN A 40 MILE WIDE AREA THAT EXTENDED FROM 40 MILES SOUTHWEST OF DES MOINES...NEAR GREENFIELD TO 10 MILES NORTHEAST OF WATERLOO. THE STORMS WERE MOVING EAST AT 30 MILES AN HOUR. FILLBACH
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:07 PM CDT | Severe Thunderstorm Warning | DMX | Story | 38 min |
| May 27, 7:35 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 25 min |
| May 27, 8:12 PM CDT | Tornado Warning | DMX | Black Hawk | 33 min |
| May 27, 8:41 PM CDT | Severe Thunderstorm Warning | DMX | Buchanan | 50 min |
| May 27, 8:48 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 34 min |
| May 27, 11:07 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 23 min |
Nearby
Tornado Warnings in Iowa, 1993Every tornado warning in 1993Tornadoes in 1993
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.