Alert archive / Iowa / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 21, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at May 27, 1993, 8:41 PM CDT for Buchanan County, Iowa. It was in force for 50 min.
The area
The counties it named.
The facts
- Issued
- May 27, 1993, 8:41 PM CDT (01:41 UTC)
- Expired
- May 27, 1993, 9:31 PM CDT
- In force
- 50 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Buchanan County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 1.7 hours before the alert went out and 300 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 724 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS1 KALO 280144 SVRDMX IAC019-280245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 841 PM CDT THU MAY 27 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...BUCHANAN COUNTY AT 835 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHEAST OF WATERLOO MOVING EAST SOUTHEAST AT 20 MILES. THIS STORM HAS PRODUCED NUMEROUS REPORTS OF 3/4 INCH HAIL IN THE WATERLOO AREA AND WILL BE EFFECTING THE TOWNS OF JESUP AND BRANDON. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING... VERY HEAVY RAIN AND OCCASIONALLY TORNADOES. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A REINFORCED BUILDING. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. SPEECE &
What forecasters said that day
The local office's own words before this severe thunderstorm 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, 8:00 PM CDT, 41 minutes before
IAZ060-280200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 800 PM CDT THU MAY 27 1993 ...THUNDERSTORMS SHOULD MISS MOST OF THE DES MOINES AREA... SEVERE THUNDERSTORMS HAVE BEEN LOCATED JUST NORTH OF THE DES MOINES METRO AREA FOR MUCH OF THE EVENING. NATIONAL WEATHER SERVICE RADAR INDICATES THAT MOST OF THESE STORMS WILL REMAIN JUST NORTH OF THE METRO AREA. EVENING OUTDOOR ACTIVITIES DOWNTOWN...INCLUDING THE SEC TAYLOR BASEBALL GAME AND CONCERT...SHOULD REMAIN RAINFREE. NORTH SECTIONS OF THE METRO AREA...GENERALLY NORTH OF INTERSTATE 80 COULD RECEIVE A SHOWER OR PASSING THUNDERSTORM. FELDT
Special weather statement, May 27, 8:00 PM CDT, 41 minutes before
IAZ060-280200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 800 PM CDT THU MAY 27 1993 ...THUNDERSTORMS SHOULD MISS MOST OF THE DES MOINES AREA... SEVERE THUNDERSTORMS HAVE BEEN LOCATED JUST NORTH OF THE DES MOINES METRO AREA FOR MUCH OF THE EVENING. NATIONAL WEATHER SERVICE RADAR INDICATES THAT MOST OF THESE STORMS WILL REMAIN JUST NORTH OF THE METRO AREA. EVENING OUTDOOR ACTIVITIES DOWNTOWN...INCLUDING THE SEC TAYLOR BASEBALL GAME AND CONCERT...SHOULD REMAIN RAINFREE. NORTH SECTIONS OF THE METRO AREA...GENERALLY NORTH OF INTERSTATE 80 COULD RECEIVE A SHOWER OR PASSING THUNDERSTORM. FELDT
Special weather statement, May 27, 8:04 PM CDT, 37 minutes before
IAZ060-280200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 805 PM CDT THU MAY 27 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE DES MOINES METRO AREA UNTIL 10 PM CDT... THUNDERSTORMS CONTINUE TO DEVELOP ALONG A COLD FRONT IN CENTRAL IOWA. THE STRONGEST THUNDERSTORMS ARE NORTH OF THE DES MOINES METRO AREA...AND ARE MOVING TO THE EAST AT 30 MILES AN HOUR. AS OF 8 PM CDT RADAR SHOWED A THUNDERSTORM IN NORTHERN POLK COUNTY...NEAR SAYLORVILLE LAKE. CITIES IN NORTHERN POLK COUNTY...INCLUDING POLK CITY...ANKENY...AND ALLEMAN WILL SEE BRIEF HEAVY RAIN...HAIL AND STRONG GUSTY WINDS BEFORE 830 PM. VERY LITTLE RAIN IS EXPECTED IN THE DES M2OINES METRO AREA OVER THE NEXT FEW HOURS...HOWEVER YOU SHOULD CONTINUE TO MONITOR THE WEATHER FOR THE LATEST FORECASTS AND POSSIBLE WARNINGS. LEWIS FILLBACH
Special weather statement, May 27, 8:05 PM CDT, 36 minutes before
IAZ060-280200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 805 PM CDT THU MAY 27 1993 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE DES MOINES METRO AREA UNTIL 10 PM CDT... THUNDERSTORMS CONTINUE TO DEVELOP ALONG A COLD FRONT IN CENTRAL IOWA. THE STRONGEST THUNDERSTORMS ARE NORTH OF THE DES MOINES METRO AREA...AND ARE MOVING TO THE EAST AT 30 MILES AN HOUR. AS OF 8 PM CDT RADAR SHOWED A THUNDERSTORM IN NORTHERN POLK COUNTY...NEAR SAYLORVILLE LAKE. CITIES IN NORTHERN POLK COUNTY...INCLUDING POLK CITY...ANKENY...AND ALLEMAN WILL SEE BRIEF HEAVY RAIN...HAIL AND STRONG GUSTY WINDS BEFORE 830 PM. VERY LITTLE RAIN IS EXPECTED IN THE DES MOINES METRO AREA OVER THE NEXT FEW HOURS...HOWEVER YOU SHOULD CONTINUE TO MONITOR THE WEATHER FOR THE LATEST FORECASTS AND POSSIBLE WARNINGS. LEWIS FILLBACH
Special weather statement, May 27, 8:30 PM CDT, 11 minutes before
IAZ006>011-016>019-026>029-038>040-280230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 830 PM CDT THU MAY 27 1993 ...SEVERE THUNDERSTORMS IN BLACKHAWK 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 830 PM RADAR INDICATED A TORNADO PRODUCING SEVERE THUNDERSTORM 5 MILES SOUTH OF WATERLOO MOVING SOUTHEAST AT 20 MILES AN HOUR. NO TORNADOES HAVE BEEN REPORTED BUT 3/4 INCH HAIL WAS REPORTED BY THE PUBLIC 5 MILES SOUTH OF WATERLOO ALONG HIGHWAY 21 AT 825 PM. THIS SEVERE STORM WILL MOVE INTO THE INDEPENDENCE AREA BY 9 PM AND WILL LIKELY CONTINUE TO PRODUCE LARGE HAIL AND DAMAGING WINDS. STRONG STORMS HAVE ALSO FORMED IN THE DECORAH AREA AND WILL LIKELY PRODUCE BRIEF DOWNPOURS...SMALL HAIL AND STRONG WINDS THROUGH 930 PM IN THE DECORAH AND WAUKON AREAS. DP
Special weather statement, May 27, 8:40 PM CDT, 1 minute before
IAZ006>011-016>019-026>029-038>040-280130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 830 PM CDT THU MAY 27 1993 ...STRONG THUNDERSTORMS IN BLACKHAWK 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 830 PM RADAR INDICATED A TORNADO PRODUCING SEVERE THUNDERSTORM 5 MILES SOUTH OF WATERLOO MOVING SOUTHEAST AT 20 MILES AN HOUR. NO TORNADOES HAVE BEEN REPORTED BUT 3/4 INCH HAIL WAS REPORTED BY THE PUBLIC 5 MILES SOUTH OF WATERLOO ALONG HIGHWAY 21 AT 825 PM. THIS SEVERE STORM WILL MOVE INTO THE INDEPENDENCE AREA BY 9 PM AND WILL LIKELY CONTINUE TO PRODUCE LARGE HAIL AND DAMAGING WINDS. STRONG STORMS HAVE ALSO FORMED IN THE DECORAH AREA AND WILL LIKELY PRODUCE BRIEF DOWNPOURS...SMALL HAIL AND STRONG
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, 7:53 PM CDT | Tornado Warning | DMX | Marshall | 27 min |
| May 27, 8:12 PM CDT | Tornado Warning | DMX | Black Hawk | 33 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
Severe Thunderstorm Warnings in Iowa, 1993Every severe thunderstorm warning 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.