Alert archive / Iowa / Tornado Warnings in 1993
Tornado Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this tornado warning at May 27, 1993, 8:12 PM CDT for Black Hawk County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- May 27, 1993, 8:12 PM CDT (01:12 UTC)
- Expired
- May 27, 1993, 8:45 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Black Hawk County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 1.2 hours before the alert went out and 284 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 TTAA00 KALO 280116 TORALO IAC013-280145- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE WATERLOO IA 812 PM CDT THU MAY 27 1993 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...BLACK HAWK COUNTY AT 810 PM CDT...WEATHER RADAR INDICATED A TORNADO PRODUCING THUNDERSTORM 5 MILES SOUTHEAST OF THE CENTER OF WATERLOO. THIS STORM WAS MOVING EAST AT 20 MPH AND WILL EFFECT THE WATERLOO/CEDAR FALLS AREAS...EVANSDALE AND HUDSON. THIS IS A DANGEROUS STORM SITUATION. ACT QUICKLY. YOU SHOULD SEEK SHELTER BELOW GROUND LEVEL IF POSSIBLE. OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE AND AVOID WINDOWS. DO NOT TRY TO OUTRUN A TORNADO IN YOUR CAR. ABANDON YOUR CAR AND SEEK SHELTER IN A REINFORCED BUILDING. IF NO STRUCTURE IS NEARBY... SEEK SHELTER IN A DITCH OR LOW SPOT. SPEECE/PABS T
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, 7:45 PM CDT, 27 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, 21 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, 8:00 PM CDT, 12 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, 12 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, 8 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, 7 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
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, 8:41 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.