Alert archive / Iowa / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 94, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jun 12, 1994, 7:45 PM CDT for Clay County, Dickinson County, Iowa. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Jun 12, 1994, 7:45 PM CDT (00:45 UTC)
- Expired
- Jun 12, 1994, 8:15 PM CDT
- In force
- 30 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Clay County, IA, Dickinson County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 00:00Z, 0.8 hours before the alert went out and 219 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
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, 6:49 PM CDT, 56 minutes before
IAZALL-130040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 649 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR WESTERN AND CENTRAL IOWA UNTIL 1000 PM CDT THIS SUNDAY EVENING... AT 633 PM...INTENSE THUNDERSTORMS WERE MOVING INTO THE EXTREME NORTHWEST IOWA AROUND THE ROCK RAPIDS...SIBLEY AND SPIRIT LAKE AREA. THESE STORMS ARE LIKELY TO PRODUCE EXTREMELY HEAVY RAIN... HAIL...STRONG THUNDERSTORM WINDS AND NEARLY CONTINUOUS CLOUD TO GROUND LIGHTNING. PEOPLE IN THE PATH OF THESE STORMS SHOULD MONITOR CONDITIONS CLOSELY. AN AREA OF SHOWERS AND WIDELY SCATTERED THUNDERSTORMS WAS MOVING THROUGH NORTH CENTRAL INTO NORTHEAST IOWA. THE LEADING EDGE OF THESE SHOWERS AND STORMS EXTENDED FROM 20 MILES SOUTH OF WATERLOO NORTHEAST TO NEAR WAUKON...IN THE NORTHEAST CORNER OF IOWA. THE STORMS OVER NORTHWEST IOWA WERE MOVING EAST AT 20 TO 25 MILES AN HOUR WHILE THE SHOWERS AND STORMS OVER NORTHEAST AND NORTH CENTRAL IOWA WERE MOVING EAST AT 35 MILES AN HOUR. BARLOW
Special weather statement, Jun 12, 7:10 PM CDT, 35 minutes before
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</html>Special weather statement, Jun 12, 7:15 PM CDT, 30 minutes before
IAZ006-007-008-009-010-011-016-017-018-019-026-027-028-029-038- 039-040-130115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WATERLOO IA 710 PM CDT SUN JUN 12 1994 ...SHOWERS AND STORMS CONTINUE TO THE EAST OF HIGHWAY 63 CORRIDOR... AT 705 PM RADAR WAS SHOWING A LARGE AREA OF SHOWERS AND THUNDERSTORMS ACROSS NORTHEAST AND NORTH CENTRAL IOWA. THE STRONGEST STORMS WERE IN A LINE FROM 5 MILES EAST OF DECORAH TO 7 MILES NORTHEAST OF INDEPENDENCE. THESE STORMS ARE CAPABLE OF PRODUCING ISOLATED GUSTS UP TO 50 MPH ALONG WITH SMALL HAIL...DEADLY LIGHTNING AND BRIEF HEAVY RAINS. THE STRONGEST STORMS WERE MOVING EAST AT 40 MPH AND WILL AFFECT THE FOLLOWING TOWNS: WAUKON...ELKADER AND MANCHESTER THROUGH 715 - 735 PM TRI STATE AREA INCLUDING DUBUQUE 720 - 740 PM FOR AREAS ALONG AND WEST OF HIGHWAY 63 AN AREA OF LIGHT RAIN SHOWERS WILL PERSIST THROUGH THE EVENING HOURS. A TORNADO WATCH REMAINS IN EFFECT FOR AREAS ALONG AND WEST OF I-35 TILL 10 PM. MORE THUNDERSTORMS WERE MOVING INTO FAR NORTHWEST IOWA AND WILL HAVE TO BE MONITORED FOR NORTH CENTRAL IOWA LATER THIS EVENING. STAY TUNED FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. TRS
Special weather statement, Jun 12, 7:26 PM CDT, 19 minutes before
IAZALL-130330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 726 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH REMAINS IN EFFECT FOR THE WESTERN TWO-THIRDS OF IOWA UNTIL 1000 PM CDT... THE POTENTIAL CONTINUES FOR A SEVERE WEATHER OUTBREAK ACROSS IOWA THIS EVENING. SEVERE THUNDERSTORMS WERE ORGANIZING INTO A BAND FROM SOUTHWEST MINNESOTA TO SOUTH CENTRAL NEBRASKA. SEVERAL TORNADOES HAVE ALREADY BEEN REPORTED ALONG THIS LINE. IT IS EXPECTED TO MARCH EAST ACROSS IOWA DURING THE EVENING HOURS. THEY WILL BEGIN TO AFFECT THE FORT DODGE AND COUNCIL BLUFFS AREAS BY 900 PM CDT...AND THE DES MOINES/AMES AREAS AFTER 1000 PM CDT. WEATHER BALLOONS...DOPPLER RADAR....AND SATTELITE PICTURES AS OF 700 PM CDT CONFIRMED THAT THIS IS A PARTICULARLY DANGEROUS SITUATION FOR RESIDENTS IN THE TORNADO WATCH AREA. LARGE HAIL...DAMAGING WINDS... HEAVY RAIN...AND TORNADOES ARE ALL POSSIBLE AS THIS LINE MARCHES EAST ACROSS IOWA TONIGHT. ALL RESIDENTS OF IOWA ARE URGED TO STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL MEDIA BROADCASTS THROUGHOUT THE NIGHT FOR ALL THE LATEST BULLETINS AND WARNINGS. PYTLAK
Special weather statement, Jun 12, 7:27 PM CDT, 18 minutes before
IAZALL-130330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 726 PM CDT SUN JUN 12 1994 ...A TORNADO WATCH REMAINS IN EFFECT FOR THE WESTERN TWO-THIRDS OF IOWA UNTIL 1000 PM CDT... THE POTENTIAL CONTINUES FOR A SEVERE WEATHER OUTBREAK ACROSS IOWA THIS EVENING. SEVERE THUNDERSTORMS WERE ORGANIZING INTO A BAND FROM SOUTHWEST MINNESOTA TO SOUTH CENTRAL NEBRASKA. SEVERAL TORNADOES HAVE ALREADY BEEN REPORTED ALONG THIS LINE. IT IS EXPECTED TO MARCH EAST ACROSS IOWA DURING THE EVENING HOURS. THEY WILL BEGIN TO AFFECT THE FORT DODGE AND COUNCIL BLUFFS AREAS BY 900 PM CDT...AND THE DES MOINES/AMES AREAS AFTER 1000 PM CDT. WEATHER BALLOONS...DOPPLER RADAR....AND SATTELITE PICTURES AS OF 700 PM CDT CONFIRMED THAT THIS IS A PARTICULARLY DANGEROUS SITUATION FOR RESIDENTS IN THE TORNADO WATCH AREA. LARGE HAIL...DAMAGING WINDS... HEAVY RAIN...AND TORNADOES ARE ALL POSSIBLE AS THIS LINE MARCHES EAST ACROSS IOWA TONIGHT. ALL RESIDENTS OF IOWA ARE URGED TO STAY TUNED TO NOAA WEATHER RADIO OR COMMERCIAL MEDIA BROADCASTS THROUGHOUT THE NIGHT FOR ALL THE LATEST BULLETINS AND WARNINGS. PYTLAK
Special weather statement, Jun 12, 7:45 PM CDT, 0 minutes before
IAZALL-130140- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 745 PM CDT SUN JUN 12 1994 ...TORNADO WATCH IN EFFECT FOR WESTERN AND CENTRAL IOWA UNTIL 1000 PM CDT THIS SUNDAY EVENING... AT 730 PM...INTENSE THUNDERSTORMS WERE LOCATED OVER EXTREME NORTHWEST IOWA. THESE STORMS WERE LLOCATED AROUND SPIRIT LAKE AND ROCK RAPIDS. HAIL...BRIEF TORENTIAL DOWNPOURS...WINDS GUSTS IN EXCESS OF 40 MILES AN HOUR AND NEARLY CONTINUOUS DEADLY LIGHTNING CAN BE EXPECTED WITH THESE STORMS. THESE STORMS WERE PART OF AN EXPANDING AREA OF SHOWERS AND THUNDERSTORMS ALONG AND NORTH OF A LINE FROM 20 MILES NORTH OF SIOUX CITY NORTHEAST TO TO ESTHERVILLE. ESTHERVILLE IS 20 MILES NORTHEAST OF SPENCER. ANOTHER AREA OF SHOWERS AND ISOLATED THUNDERSTORMS WAS LOCATED OVER THE NORTHEAST QUARTER OF IOWA. THIS AREA WAS NORTHEAST OF A LINE FROM 10 MILES EAST OF MASON CITY SOUTHEAST TO 10 MILES NORTH OF CEDAR RAPIDS. THE SHOWERS AND STORMS WERE ALL MOVING EAST AT 30 TO 35 MILES AN HOUR. BARLOW
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, 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, 10:58 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 47 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.