Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 101, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1994, 10:58 PM CDT for Black Hawk County, Iowa. It was in force for 47 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 10:58 PM CDT (03:58 UTC)
- Expired
- Jun 12, 1994, 11:45 PM CDT
- In force
- 47 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, 4.0 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
- 1268 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 106 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 130359 SVRDMX IAC013-130445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WATERLOO IA 1058 PM CDT SUN JUN 12 1994 THE NATIONAL WEATHER SERVICE IN WATERLOO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST IOWA ...BLACK HAWK COUNTY AT 1057 PM RADAR INDICATED SEVERE THUNDERSTORMS 5 MILES NORTHWEST OF WATERLOO NEAR FINCHFORD. THESE STORMS WERE MOVING SOUTHEAST AT 35 MPH AND WILL AFFECT THE WATERLOO METRO AREA BY 1110 PM. OTHER CITIES TO BE AFFECTED INCLUDE HUDSON...DUNKERTON...EVANSDALE AND CEDAR FALLS. WINDS IN EXCESS OF 60 MPH ALONG WITH LARGE HAIL WILL ACCOMPANY THIS SEVERE STORM. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. MOVE TO THE CENTER OF THE HOUSE AND STAY AWAY FROM WINDOWS. BE READY TO ACT QUICKLY IF A TORNADO DEVELOPS. COLLAR/DEWALD K|F^<SHOWERS. A SLIG!`WWUS. -6WWUS 7q4WSUSJ IN 70S. 86WWUS, +6WWUS 0XWSUSH EVENING THUNDERERS. COOLER WITWS IN THE UPPER %6WWUS SDAY...PARTLY CL.bWWUS $= WUUSL 0v6WWUS` <WWUS& p3U^WSUSB T1000- WEST CEN=[6WWUSz H-b6WWUS /86WWUS ERS.
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, Jun 12, 9:47 PM CDT, 1 hour 11 minutes before
IAZ006>011-016>019-026>029-038>040-130400- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 945 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR A LARGE PART OF IOWA UNTIL 10 PM... AT 940 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS FROM 5 MILES WEST OF MASON CITY TO NEAR FORT DODGE. THESE STORMS WERE MOVING SOUTHEAST AT 35 MPH AND WILL BE CAPABLE OF PRODUCING WINDS UP TO 50 MPH...BRIEF HEAVY RAINS AND DEADLY LIGHTNING. CITIES TO BE AFFECTED BY THE STORMS THROUGH 1015 PM INCLUDE MASON CITY ...CLEAR LAKE AND ALEXANDER. THEY WILL ARRIVE IN HAMPTON BY 1015 PM. A TORNADO WATCH IS IN EFFECT FOR AREAS MAINLY SOUTH OF HIGHWAY 18 AND WEST OF HIGHWAY 218 UNTIL 4 AM. S.TAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL T.V. OR RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. COLLAR
Special weather statement, Jun 12, 9:47 PM CDT, 1 hour 11 minutes before
IAZALL-130340- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 947 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR ALL EXCEPT THE EXTREME NORTHEAST CORNER OF IOWA UNTIL 4 AM MONDAY MORNING... AT 932 PM...A 25 TO 35 MILE WIDE BAND OF INTENSE THUNDERSTORMS WAS LOCATED FROM JUST NORTH OF SIOUX CITY NORTHEAST TO ABOUT 10 MILES WEST OF MASON CITY. SEVERAL OF THE STORMS IN THIS AREA HAVE BEEN PRODUCING TORRENTIAL RAIN...NEARLY CONTINUOUS DEADLY LIGHTNING...WINDS GUSTS OF 40 TO 50 MILES AN HOUR AND HAIL. THESE STORMS WERE PART OF A MUCH LARGER AREA OF SHOWERS AND STORMS LOCATED ALONG AND NORTH OF A LINE FROM 20 MILES NORTH O OMAHA/COUNCIL BLUFFS NORTHEAST TO CRESCO. CRESCO IS 50 MILES NORTH OF WATERLOO. THE SHOWERS AND STORMS WERE MOVING EAST SOUTHEAST AT 30 MILES AN HOUR. BARLOW
Special weather statement, Jun 12, 9:48 PM CDT, 1 hour 10 minutes before
IAZ006>011-016>019-026>029-038>040-130400- SPECIAL WEATHER STATEMENT...CORRECT TIME IN HEADLINE NATIONAL WEATHER SERVICE WATERLOO IA 945 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH CONTINUES FOR A LARGE PART OF IOWA UNTIL 4 AM... AT 940 PM RADAR INDICATED A LINE OF STRONG THUNDERSTORMS FROM 5 MILES WEST OF MASON CITY TO NEAR FORT DODGE. THESE STORMS WERE MOVING SOUTHEAST AT 35 MPH AND WILL BE CAPABLE OF PRODUCING WINDS UP TO 50 MPH...BRIEF HEAVY RAINS AND DEADLY LIGHTNING. CITIES TO BE AFFECTED BY THE STORMS THROUGH 1015 PM INCLUDE MASON CITY ...CLEAR LAKE AND ALEXANDER. THEY WILL ARRIVE IN HAMPTON BY 1015 PM. A TORNADO WATCH IS IN EFFECT FOR AREAS MAINLY SOUTH OF HIGHWAY 18 AND WES8T OF HIGHWAY 218 UNTIL 4 AM. STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL T.V. OR RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS. COLLAR
Special weather statement, Jun 12, 10:46 PM CDT, 12 minutes before
IAZALL-130440- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 1046 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR ALL EXCEPT THE EXTREME NORTHEAST CORNER OF IOWA UNTIL 4 AM MONDAY MORNING... AT 1030 PM...NUMEROUS VERY STRONG THUNDERSTORMS CONTINUED OVER ABOUT THE NORTHWEST THIRD OF IOWA. THESE STORMS WERE LOCATED ALONG AND ABOUT 30 MILES EITHER SIDE OF A LINE FROM 10 MILES EAST OF SIOUX CITY EAST TO AROUND IOWA FALLS THEN NORTHEAST TO OSAGE. IOWA FALLS IS 40 MILES WEST OF WATERLOO WHILE OSAGE IS 25 MILES NORTHEAST OF MASON CITY. SEVERAL OF THE STORMS IN THIS AREA WILL PRODUCE TORRENTIAL RAIN... HAIL...STRONG THUNDERSTORM WINDS AND NEARLY CONTINUOUS CLOUD TO GROUND LIGHTNING. THESE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS THAT WAS OVER SPREADING THE NORTHWEST HALF OF IOWA. THE LEADING EDGE OF THE SHOWERS AND STORMS EXTENDED FROM OMAHA/COUNCIL BLUFFS NORTHEAST TO TO NEAR WATERLOO THEN NORTHEAST TO THE IOWA/WISCONSIN BORDER NEAR LANSING. THE SHOWERS AND STORMS WERE MOVING EAST SOUTHEAST AT 30 MILES AN HOUR. BARLOW
Special weather statement, Jun 12, 10:48 PM CDT, 10 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-130445- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1048 PM CDT SUN JUN 12 1994 ...INTENSE THUNDERSTORMS BEARING DOWN ON WATERLOO/CEDAR FALLS... BETWEEN 11 PM AND 1115 PM INTENSE THUNDERSTORMS WILL ARRIVE IN THE WATERLOO/CEDAR FALLS AREA PRODUCING GUSTY WINDS OF 40 TO 50 MPH... MARBLE SIZE HAIL...HEAVY RAINS AND FREQUENT DEADLY LIGHTNING. OTHER STRONG STORMS WILL MOVE THROUGH NEW HAMPTON...SUMNER AND WAVERLY BY 1110 PM. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF THE AREA UNTIL 4 AM. TAKE SHELTER FROM THESE STORMS AS THEY APPROACH. COLLAR &
Special weather statement, Jun 12, 10:50 PM CDT, 8 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-130445- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 1048 PM CDT SUN JUN 12 1994 ...INTENSE THUNDERSTORMS BEARING DOWN ON WATERLOO/CEDAR FALLS... BETWEEN 11 PM AND 1115 PM INTENSE THUNDERSTORMS WILL ARRIVE IN THE WATERLOO/CEDAR FALLS AREA PRODUCING GUSTY WINDS OF 40 TO 50 MPH... MARBLE SIZE HAIL...HEAVY RAINS AND FREQUENT DEADLY LIGHTNING. OTHER STRO~NG STORMS WILL MOVE THROUGH NEW HAMPTON...SUMNER AND WAVERLY BY 1110 PM. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF THE AREA UNTIL 4 AM. TAKE SHELTER FROM THESE STORMS AS THEY APPROACH. COLLAR &
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:08 PM CDT | Tornado Warning | DMX | Dickinson | 37 min |
| Jun 12, 7:15 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 30 min |
| Jun 12, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Dickinson | 30 min |
| Jun 12, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | Clay, Palo Alto | 30 min |
| Jun 12, 8:25 PM CDT | Tornado Warning | DMX | Palo Alto | 35 min |
| Jun 12, 8:55 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Kossuth | 35 min |
| Jun 12, 9:26 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 34 min |
| Jun 12, 9:37 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 38 min |
| Jun 12, 9:41 PM CDT | Tornado Warning | DMX | Wright | 34 min |
| Jun 12, 9:56 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin | 34 min |
| Jun 12, 10:14 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 31 min |
| Jun 12, 11:31 PM CDT | Severe Thunderstorm Warning | DMX | Fayette | 29 min |
| Jun 12, 11:38 PM CDT | Severe Thunderstorm Warning | DMX | Carroll | 22 min |
| Jun 13, 12:10 AM CDT | Severe Thunderstorm Warning | DMX | Adams | 14 min |
| Jun 13, 12:54 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas | 21 min |
| Jun 13, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | Marion | 28 min |
| Jun 13, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | Poweshiek | 28 min |
| Jun 13, 1:19 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska | 26 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1994Every severe thunderstorm warning in 1994
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.